MySQL 8.4.3
Source Code Documentation
sys_vars.cc File Reference

Definitions of all server's session or global variables. More...

#include "sql/sys_vars.h"
#include "my_config.h"
#include <assert.h>
#include <limits.h>
#include <math.h>
#include <stdint.h>
#include <stdio.h>
#include <sys/stat.h>
#include <zlib.h>
#include <atomic>
#include <limits>
#include "include/compression.h"
#include "mysql/components/services/log_builtins.h"
#include "mysql/components/services/log_shared.h"
#include "mysql/my_loglevel.h"
#include "mysql_com.h"
#include "sql/auth/authentication_policy.h"
#include "sql/protocol.h"
#include "sql/rpl_trx_tracking.h"
#include <sys/time.h>
#include <unistd.h>
#include <algorithm>
#include <map>
#include <utility>
#include "ft_global.h"
#include "m_string.h"
#include "my_aes.h"
#include "my_command.h"
#include "my_compiler.h"
#include "my_dbug.h"
#include "my_dir.h"
#include "my_double2ulonglong.h"
#include "my_io.h"
#include "my_macros.h"
#include "my_sqlcommand.h"
#include "my_thread.h"
#include "my_thread_local.h"
#include "my_time.h"
#include "myisam.h"
#include "mysql/binlog/event/binlog_event.h"
#include "mysql/binlog/event/compression/zstd_comp.h"
#include "mysql/plugin_group_replication.h"
#include "mysql/psi/mysql_mutex.h"
#include "mysql/strings/dtoa.h"
#include "mysql/strings/int2str.h"
#include "mysql/strings/m_ctype.h"
#include "mysql_version.h"
#include "nulls.h"
#include "sql-common/my_decimal.h"
#include "sql/auth/auth_acls.h"
#include "sql/auth/auth_common.h"
#include "sql/binlog.h"
#include "sql/changestreams/apply/replication_thread_status.h"
#include "sql/clone_handler.h"
#include "sql/conn_handler/connection_handler_impl.h"
#include "sql/conn_handler/connection_handler_manager.h"
#include "sql/conn_handler/socket_connection.h"
#include "sql/derror.h"
#include "sql/discrete_interval.h"
#include "sql/events.h"
#include "sql/hostname_cache.h"
#include "sql/log.h"
#include "sql/mdl.h"
#include "sql/opt_trace_context.h"
#include "sql/options_mysqld.h"
#include "sql/protocol_classic.h"
#include "sql/psi_memory_key.h"
#include "sql/query_options.h"
#include "sql/rpl_group_replication.h"
#include "sql/rpl_handler.h"
#include "sql/rpl_info_factory.h"
#include "sql/rpl_info_handler.h"
#include "sql/rpl_log_encryption.h"
#include "sql/rpl_mi.h"
#include "sql/rpl_msr.h"
#include "sql/rpl_mta_submode.h"
#include "sql/rpl_replica.h"
#include "sql/rpl_rli.h"
#include "sql/server_component/log_builtins_filter_imp.h"
#include "sql/server_component/log_builtins_imp.h"
#include "sql/session_tracker.h"
#include "sql/sp_head.h"
#include "sql/sql_lex.h"
#include "sql/sql_locale.h"
#include "sql/sql_parse.h"
#include "sql/sql_show_processlist.h"
#include "sql/sql_tmp_table.h"
#include "sql/ssl_acceptor_context_operator.h"
#include "sql/system_variables.h"
#include "sql/table_cache.h"
#include "sql/transaction.h"
#include "sql/transaction_info.h"
#include "sql/xa.h"
#include "string_with_len.h"
#include "template_utils.h"
#include "thr_lock.h"
#include "my_openssl_fips.h"
#include "storage/perfschema/pfs_server.h"
#include "storage/perfschema/terminology_use_previous.h"

Classes

struct  anonymous_namespace{sys_vars.cc}::Get_name
 
struct  anonymous_namespace{sys_vars.cc}::Get_csname
 
struct  anonymous_namespace{sys_vars.cc}::Get_locale_name
 

Namespaces

namespace  anonymous_namespace{sys_vars.cc}
 Warn usage of restrict_fk_on_non_standard_key variable.
 

Macros

#define export   /* not static */
 
#define PFS_TRAILING_PROPERTIES
 

Functions

static bool update_buffer_size (THD *, KEY_CACHE *key_cache, ptrdiff_t offset, ulonglong new_value)
 
static bool update_keycache_param (THD *, KEY_CACHE *key_cache, ptrdiff_t offset, ulonglong new_value)
 
static bool check_tagged_gtid_next_privileges (sys_var *self, THD *thd, set_var *setv)
 Check if correct privileges for GTID_NEXT tagged are granted. More...
 
static bool check_session_admin_or_replication_applier (sys_var *self, THD *thd, set_var *setv)
 Check if REPLICATION_APPLIER granted. More...
 
static bool check_session_admin_privileges_only (sys_var *self, THD *thd, set_var *setv)
 Utility method that checks if user has correct session administrative dynamic privileges. More...
 
static bool check_session_admin_no_super (sys_var *self, THD *thd, set_var *setv)
 Check if SESSION_VARIABLES_ADMIN granted. More...
 
static bool check_session_admin (sys_var *self, THD *thd, set_var *setv)
 Check if SESSION_VARIABLES_ADMIN granted. More...
 
static bool performance_schema_show_processlist_update (sys_var *, THD *thd, enum_var_type)
 Update the performance_schema_show_processlist. More...
 
static bool check_partial_revokes (sys_var *self, THD *thd, set_var *setv)
 Checks, if there exists at least a partial revoke on a database at the time of turning OFF the system variable "@@partial_revokes". More...
 
static bool partial_revokes_update (sys_var *, THD *, enum_var_type)
 Set the updated global variable to the corresponding atomic system variable. More...
 
static bool fix_binlog_cache_size (sys_var *, THD *thd, enum_var_type)
 
static bool fix_binlog_stmt_cache_size (sys_var *, THD *thd, enum_var_type)
 
static bool check_outside_trx (sys_var *var, THD *thd, set_var *)
 
static bool check_session_admin_outside_trx_outside_sf (sys_var *self, THD *thd, set_var *var)
 
static bool check_explicit_defaults_for_timestamp (sys_var *self, THD *thd, set_var *var)
 
static bool check_gtid_next (sys_var *self, THD *thd, set_var *var)
 Check-function to @GTID_NEXT system variable. More...
 
static bool check_session_admin_outside_trx_outside_sf_outside_sp (sys_var *self, THD *thd, set_var *var)
 
static bool binlog_format_check (sys_var *self, THD *thd, set_var *var)
 
static bool fix_binlog_format_after_update (sys_var *, THD *thd, enum_var_type type)
 
static bool prevent_global_rbr_exec_mode_idempotent (sys_var *self, THD *, set_var *var)
 
static bool check_binlog_row_image (sys_var *self, THD *thd, set_var *var)
 
static bool check_binlog_trx_compression (sys_var *self, THD *thd, set_var *var)
 
static bool on_session_track_gtids_update (sys_var *, THD *thd, enum_var_type)
 
static bool binlog_direct_check (sys_var *self, THD *thd, set_var *var)
 
static bool replica_parallel_workers_update (sys_var *, THD *thd, enum_var_type)
 
static bool check_not_null (sys_var *, THD *, set_var *var)
 
static bool check_storage_engine (sys_var *self, THD *thd, set_var *var)
 Check storage engine is not empty and log warning. More...
 
static bool check_charset (sys_var *, THD *thd, set_var *var)
 
static bool check_charset_not_null (sys_var *self, THD *thd, set_var *var)
 
static bool check_charset_db (sys_var *self, THD *thd, set_var *var)
 
static bool update_deprecated_with_removal_message (sys_var *self, THD *thd, enum_var_type)
 
static bool update_deprecated (sys_var *self, THD *thd, enum_var_type)
 
static bool check_cs_client (sys_var *self, THD *thd, set_var *var)
 
static bool fix_thd_charset (sys_var *, THD *thd, enum_var_type type)
 
static bool check_cs_filesystem (sys_var *self, THD *thd, set_var *var)
 
static bool check_collation_not_null (sys_var *self, THD *thd, set_var *var)
 
static bool check_collation_db (sys_var *self, THD *thd, set_var *var)
 
export bool fix_delay_key_write (sys_var *, THD *, enum_var_type)
 
static bool event_scheduler_check (sys_var *, THD *, set_var *var)
 
static bool event_scheduler_update (sys_var *, THD *, enum_var_type)
 
static bool check_ftb_syntax (sys_var *, THD *, set_var *var)
 
static bool check_init_string (sys_var *, THD *, set_var *var)
 
static bool check_log_error_services (sys_var *self, THD *thd, set_var *var)
 
static bool fix_log_error_services (sys_var *self, THD *thd, enum_var_type type)
 
static bool check_log_error_suppression_list (sys_var *self, THD *thd, set_var *var)
 
static bool fix_log_error_suppression_list (sys_var *self, THD *thd, enum_var_type type)
 
static bool update_log_throttle_queries_not_using_indexes (sys_var *, THD *thd, enum_var_type)
 
static bool update_log_error_verbosity (sys_var *, THD *, enum_var_type)
 
static bool update_cached_long_query_time (sys_var *, THD *thd, enum_var_type type)
 
static bool fix_low_prio_updates (sys_var *, THD *thd, enum_var_type type)
 
static bool session_readonly (sys_var *self, THD *, set_var *var)
 
static bool check_max_allowed_packet (sys_var *self, THD *thd, set_var *var)
 
static bool fix_max_binlog_size (sys_var *, THD *, enum_var_type)
 
static bool check_max_delayed_threads (sys_var *self, THD *thd, set_var *var)
 
static bool fix_max_join_size (sys_var *self, THD *thd, enum_var_type type)
 
static bool fix_max_relay_log_size (sys_var *, THD *, enum_var_type)
 
static bool check_net_buffer_length (sys_var *self, THD *thd, set_var *var)
 
static bool fix_net_read_timeout (sys_var *self, THD *thd, enum_var_type type)
 
static bool fix_net_write_timeout (sys_var *self, THD *thd, enum_var_type type)
 
static bool fix_net_retry_count (sys_var *self, THD *thd, enum_var_type type)
 
static bool limit_parser_max_mem_size (sys_var *, THD *thd, set_var *var)
 
void update_parser_max_mem_size ()
 
void update_optimizer_switch ()
 
static bool check_optimizer_switch (sys_var *, THD *thd, set_var *var)
 
static bool optimizer_trace_update (sys_var *, THD *thd, enum_var_type)
 Delete all old optimizer traces. More...
 
static bool check_read_only (sys_var *, THD *thd, set_var *)
 
static bool check_require_secure_transport (sys_var *, THD *, set_var *var)
 
static void event_scheduler_restart (THD *thd)
 
static bool fix_read_only (sys_var *self, THD *thd, enum_var_type)
 
static bool fix_super_read_only (sys_var *, THD *thd, enum_var_type type)
 
static bool fix_thd_mem_root (sys_var *self, THD *thd, enum_var_type type)
 
static bool fix_trans_mem_root (sys_var *self, THD *thd, enum_var_type type)
 
static bool fix_server_id (sys_var *, THD *thd, enum_var_type)
 
static bool check_not_null_not_empty (sys_var *self, THD *thd, set_var *var)
 
static bool check_slave_stopped (sys_var *self, THD *thd, set_var *var)
 
static bool is_error_gtid_mode_with_ignore_server_ids (Gtid_mode::value_type newmode)
 This function shall return true if the new gtid mode is set to GTID_MODE_ON and there is at least one replication channel with IGNORE_SERVER_IDS configured (i.e., not empty). More...
 
static void check_sub_modes_of_strict_mode (sql_mode_t &sql_mode, THD *thd)
 Check sql modes strict_mode, 'NO_ZERO_DATE', 'NO_ZERO_IN_DATE' and 'ERROR_FOR_DIVISION_BY_ZERO' are used together. More...
 
export sql_mode_t expand_sql_mode (sql_mode_t sql_mode, THD *thd)
 
static bool check_sql_mode (sys_var *, THD *thd, set_var *var)
 
static bool fix_sql_mode (sys_var *self, THD *thd, enum_var_type type)
 
export bool sql_mode_string_representation (THD *thd, sql_mode_t sql_mode, LEX_STRING *ls)
 
export bool sql_mode_quoted_string_representation (THD *thd, sql_mode_t sql_mode, LEX_STRING *ls)
 
static bool fix_table_cache_size (sys_var *, THD *, enum_var_type)
 
static bool modify_thread_cache_size (sys_var *, THD *, enum_var_type)
 Modify the thread size cache size. More...
 
static bool check_transaction_isolation (sys_var *, THD *thd, set_var *var)
 Function to check if the 'next' transaction isolation level can be changed. More...
 
static bool check_transaction_read_only (sys_var *, THD *thd, set_var *var)
 Function to check if the state of 'transaction_read_only' can be changed. More...
 
static bool pre_autocommit (sys_var *self, THD *thd, set_var *var)
 Pre-update function to commit connection's active transactions when autocommit is enabled. More...
 
static bool fix_autocommit (sys_var *self, THD *thd, enum_var_type type)
 
static bool fix_sql_log_bin_after_update (sys_var *, THD *thd, enum_var_type type)
 This function sets the session variable thd->variables.sql_log_bin to reflect changes to @session.sql_log_bin. More...
 
static bool check_sql_log_bin (sys_var *self, THD *thd, set_var *var)
 This function checks if the sql_log_bin can be changed, what is possible if: More...
 
static bool update_timestamp (THD *thd, set_var *var)
 
static double read_timestamp (THD *thd)
 
static bool check_timestamp (sys_var *, THD *, set_var *var)
 
static bool update_last_insert_id (THD *thd, set_var *var)
 
static ulonglong read_last_insert_id (THD *thd)
 
static bool update_insert_id (THD *thd, set_var *var)
 
static ulonglong read_insert_id (THD *thd)
 
static bool update_rand_seed1 (THD *thd, set_var *var)
 
static ulonglong read_rand_seed (THD *)
 
static bool update_rand_seed2 (THD *thd, set_var *var)
 
static ulonglong read_error_count (THD *thd)
 
static ulonglong read_warning_count (THD *thd)
 
static ulonglong read_statement_id (THD *thd)
 
static bool check_log_path (sys_var *self, THD *, set_var *var)
 
static bool fix_general_log_file (sys_var *, THD *, enum_var_type)
 
static bool fix_slow_log_file (sys_var *, THD *thd, enum_var_type)
 
static bool fix_general_log_state (sys_var *, THD *thd, enum_var_type)
 
static bool fix_slow_log_state (sys_var *, THD *thd, enum_var_type)
 
static bool check_slow_log_extra (sys_var *, THD *thd, set_var *)
 
static bool check_not_empty_set (sys_var *, THD *, set_var *var)
 
static bool fix_log_output (sys_var *, THD *, enum_var_type)
 
static bool fix_replica_net_timeout (sys_var *, THD *thd, enum_var_type)
 
static bool check_slave_skip_counter (sys_var *, THD *thd, set_var *var)
 
static bool check_locale (sys_var *self, THD *thd, set_var *var)
 
static bool fix_host_cache_size (sys_var *, THD *, enum_var_type)
 
const char * fixup_enforce_gtid_consistency_command_line (char *value_arg)
 
static bool check_pseudo_replica_mode (sys_var *self, THD *thd, set_var *var)
 
static bool check_gtid_purged (sys_var *self, THD *thd, set_var *var)
 
static bool check_track_session_sys_vars (sys_var *, THD *thd, set_var *var)
 
static bool update_track_session_sys_vars (sys_var *, THD *thd, enum_var_type type)
 
static bool update_session_track_schema (sys_var *, THD *thd, enum_var_type)
 
static bool update_session_track_tx_info (sys_var *, THD *thd, enum_var_type)
 
static bool update_session_track_state_change (sys_var *, THD *thd, enum_var_type)
 
static bool handle_offline_mode (sys_var *, THD *thd, enum_var_type)
 
static bool check_offline_mode (sys_var *, THD *thd, set_var *)
 Checks if user has an additional CONNECTION_ADMIN privilege, needed to modify OFFLINE_MODE system variable (unless having SUPER). More...
 
static Sys_var_bool Sys_persisted_globals_load (PERSISTED_GLOBALS_LOAD, "When this option is enabled, config file mysqld-auto.cnf is read " "and applied to server, else this file is ignored even if present.", READ_ONLY NON_PERSIST GLOBAL_VAR(persisted_globals_load), CMD_LINE(OPT_ARG), DEFAULT(true), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(nullptr))
 
static bool sysvar_check_authid_string (sys_var *, THD *thd, set_var *var)
 
static bool sysvar_update_mandatory_roles (sys_var *, THD *, enum_var_type)
 
static bool check_resultset_metadata (sys_var *, THD *thd, set_var *var)
 
static bool check_binlog_row_value_options (sys_var *self, THD *thd, set_var *var)
 
static bool check_keyring_access (sys_var *, THD *thd, set_var *)
 
static bool check_default_collation_for_utf8mb4 (sys_var *self, THD *thd, set_var *var)
 
static bool check_group_replication_consistency (sys_var *self, THD *thd, set_var *var)
 
static bool check_binlog_encryption_admin (sys_var *, THD *thd, set_var *)
 
static bool check_set_default_table_encryption_access (sys_var *self, THD *thd, set_var *var)
 
static bool check_set_table_encryption_privilege_access (sys_var *, THD *thd, set_var *)
 
static bool check_set_protocol_compression_algorithms (sys_var *, THD *, set_var *var)
 
static bool check_set_require_row_format (sys_var *, THD *thd, set_var *var)
 
static bool handle_plugin_lock_type_change (sys_var *, THD *, enum_var_type)
 Changes the Delegate internal state in regards to which type of lock to use and in regards to whether or not to take plugin locks in each hook invocation. More...
 
static bool check_authentication_policy (sys_var *, THD *, set_var *var)
 
static bool fix_authentication_policy (sys_var *, THD *, enum_var_type)
 
bool anonymous_namespace{sys_vars.cc}::restrict_fk_on_non_standard_key_check (sys_var *self, THD *thd, set_var *setv)
 

Variables

static constexpr const unsigned long DEFAULT_ERROR_COUNT {1024}
 
static constexpr const unsigned long DEFAULT_SORT_MEMORY {256UL * 1024UL}
 
static constexpr const unsigned HOST_CACHE_SIZE {128}
 
static constexpr const unsigned long SCHEMA_DEF_CACHE_DEFAULT {256}
 
static constexpr const unsigned long STORED_PROGRAM_DEF_CACHE_DEFAULT {256}
 
static constexpr const unsigned long TABLESPACE_DEF_CACHE_DEFAULT {256}
 
static constexpr const unsigned long TABLE_DEF_CACHE_MIN {400}
 We must have room for at least 400 table definitions in the table cache, since otherwise there is no chance prepared statements that use these many tables can work. More...
 
static constexpr const unsigned long SCHEMA_DEF_CACHE_MIN {256}
 
static constexpr const unsigned long STORED_PROGRAM_DEF_CACHE_MIN {256}
 
static constexpr const unsigned long TABLESPACE_DEF_CACHE_MIN {256}
 
static constexpr const unsigned long CONNECT_TIMEOUT {10}
 
static constexpr const unsigned long DELAYED_LIMIT {100}
 
static constexpr const unsigned long DELAYED_QUEUE_SIZE {1000}
 
static constexpr const unsigned long DELAYED_WAIT_TIMEOUT {5 * 60}
 
static constexpr const unsigned long QUERY_ALLOC_BLOCK_SIZE {8192}
 
static constexpr const unsigned long QUERY_ALLOC_PREALLOC_SIZE {8192}
 
static constexpr const unsigned long TRANS_ALLOC_PREALLOC_SIZE {4096}
 
static constexpr const unsigned long RANGE_ALLOC_BLOCK_SIZE {4096}
 
static constexpr const unsigned long long OPTIMIZER_SWITCH_DEFAULT
 
static constexpr const unsigned long MYSQLD_NET_RETRY_COUNT {10}
 
TYPELIB bool_typelib
 
static Sys_var_bool Sys_pfs_enabled ("performance_schema", "Enable the performance schema.", READ_ONLY GLOBAL_VAR(pfs_param.m_enabled), CMD_LINE(OPT_ARG), DEFAULT(true), PFS_TRAILING_PROPERTIES)
 
static Sys_var_charptr Sys_pfs_instrument ("performance_schema_instrument", "Default startup value for a performance schema instrument.", READ_ONLY NOT_VISIBLE GLOBAL_VAR(pfs_param.m_pfs_instrument), CMD_LINE(OPT_ARG, OPT_PFS_INSTRUMENT), IN_FS_CHARSET, DEFAULT(""), PFS_TRAILING_PROPERTIES)
 
static Sys_var_bool Sys_pfs_processlist ("performance_schema_show_processlist", "Default startup value to enable SHOW PROCESSLIST " "in the performance schema.", GLOBAL_VAR(pfs_processlist_enabled), CMD_LINE(OPT_ARG), DEFAULT(false), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(performance_schema_show_processlist_update), nullptr, sys_var::PARSE_NORMAL)
 
static Sys_var_bool Sys_pfs_consumer_events_stages_current ("performance_schema_consumer_events_stages_current", "Default startup value for the events_stages_current consumer.", READ_ONLY NOT_VISIBLE GLOBAL_VAR(pfs_param.m_consumer_events_stages_current_enabled), CMD_LINE(OPT_ARG), DEFAULT(false), PFS_TRAILING_PROPERTIES)
 
static Sys_var_bool Sys_pfs_consumer_events_stages_history ("performance_schema_consumer_events_stages_history", "Default startup value for the events_stages_history consumer.", READ_ONLY NOT_VISIBLE GLOBAL_VAR(pfs_param.m_consumer_events_stages_history_enabled), CMD_LINE(OPT_ARG), DEFAULT(false), PFS_TRAILING_PROPERTIES)
 
static Sys_var_bool Sys_pfs_consumer_events_stages_history_long ("performance_schema_consumer_events_stages_history_long", "Default startup value for the events_stages_history_long consumer.", READ_ONLY NOT_VISIBLE GLOBAL_VAR(pfs_param.m_consumer_events_stages_history_long_enabled), CMD_LINE(OPT_ARG), DEFAULT(false), PFS_TRAILING_PROPERTIES)
 
static Sys_var_bool Sys_pfs_consumer_events_statements_cpu ("performance_schema_consumer_events_statements_cpu", "Default startup value for the events_statements_cpu consumer.", READ_ONLY NOT_VISIBLE GLOBAL_VAR(pfs_param.m_consumer_events_statements_cpu_enabled), CMD_LINE(OPT_ARG), DEFAULT(false), PFS_TRAILING_PROPERTIES)
 
static Sys_var_bool Sys_pfs_consumer_events_statements_current ("performance_schema_consumer_events_statements_current", "Default startup value for the events_statements_current consumer.", READ_ONLY NOT_VISIBLE GLOBAL_VAR(pfs_param.m_consumer_events_statements_current_enabled), CMD_LINE(OPT_ARG), DEFAULT(true), PFS_TRAILING_PROPERTIES)
 
static Sys_var_bool Sys_pfs_consumer_events_statements_history ("performance_schema_consumer_events_statements_history", "Default startup value for the events_statements_history consumer.", READ_ONLY NOT_VISIBLE GLOBAL_VAR(pfs_param.m_consumer_events_statements_history_enabled), CMD_LINE(OPT_ARG), DEFAULT(true), PFS_TRAILING_PROPERTIES)
 
static Sys_var_bool Sys_pfs_consumer_events_statements_history_long ("performance_schema_consumer_events_statements_history_long", "Default startup value for the events_statements_history_long consumer.", READ_ONLY NOT_VISIBLE GLOBAL_VAR(pfs_param.m_consumer_events_statements_history_long_enabled), CMD_LINE(OPT_ARG), DEFAULT(false), PFS_TRAILING_PROPERTIES)
 
static Sys_var_bool Sys_pfs_consumer_events_transactions_current ("performance_schema_consumer_events_transactions_current", "Default startup value for the events_transactions_current consumer.", READ_ONLY NOT_VISIBLE GLOBAL_VAR(pfs_param.m_consumer_events_transactions_current_enabled), CMD_LINE(OPT_ARG), DEFAULT(true), PFS_TRAILING_PROPERTIES)
 
static Sys_var_bool Sys_pfs_consumer_events_transactions_history ("performance_schema_consumer_events_transactions_history", "Default startup value for the events_transactions_history consumer.", READ_ONLY NOT_VISIBLE GLOBAL_VAR(pfs_param.m_consumer_events_transactions_history_enabled), CMD_LINE(OPT_ARG), DEFAULT(true), PFS_TRAILING_PROPERTIES)
 
static Sys_var_bool Sys_pfs_consumer_events_transactions_history_long ("performance_schema_consumer_events_transactions_history_long", "Default startup value for the events_transactions_history_long consumer.", READ_ONLY NOT_VISIBLE GLOBAL_VAR(pfs_param.m_consumer_events_transactions_history_long_enabled), CMD_LINE(OPT_ARG), DEFAULT(false), PFS_TRAILING_PROPERTIES)
 
static Sys_var_bool Sys_pfs_consumer_events_waits_current ("performance_schema_consumer_events_waits_current", "Default startup value for the events_waits_current consumer.", READ_ONLY NOT_VISIBLE GLOBAL_VAR(pfs_param.m_consumer_events_waits_current_enabled), CMD_LINE(OPT_ARG), DEFAULT(false), PFS_TRAILING_PROPERTIES)
 
static Sys_var_bool Sys_pfs_consumer_events_waits_history ("performance_schema_consumer_events_waits_history", "Default startup value for the events_waits_history consumer.", READ_ONLY NOT_VISIBLE GLOBAL_VAR(pfs_param.m_consumer_events_waits_history_enabled), CMD_LINE(OPT_ARG), DEFAULT(false), PFS_TRAILING_PROPERTIES)
 
static Sys_var_bool Sys_pfs_consumer_events_waits_history_long ("performance_schema_consumer_events_waits_history_long", "Default startup value for the events_waits_history_long consumer.", READ_ONLY NOT_VISIBLE GLOBAL_VAR(pfs_param.m_consumer_events_waits_history_long_enabled), CMD_LINE(OPT_ARG), DEFAULT(false), PFS_TRAILING_PROPERTIES)
 
static Sys_var_bool Sys_pfs_consumer_global_instrumentation ("performance_schema_consumer_global_instrumentation", "Default startup value for the global_instrumentation consumer.", READ_ONLY NOT_VISIBLE GLOBAL_VAR(pfs_param.m_consumer_global_instrumentation_enabled), CMD_LINE(OPT_ARG), DEFAULT(true), PFS_TRAILING_PROPERTIES)
 
static Sys_var_bool Sys_pfs_consumer_thread_instrumentation ("performance_schema_consumer_thread_instrumentation", "Default startup value for the thread_instrumentation consumer.", READ_ONLY NOT_VISIBLE GLOBAL_VAR(pfs_param.m_consumer_thread_instrumentation_enabled), CMD_LINE(OPT_ARG), DEFAULT(true), PFS_TRAILING_PROPERTIES)
 
static Sys_var_bool Sys_pfs_consumer_statement_digest ("performance_schema_consumer_statements_digest", "Default startup value for the statements_digest consumer.", READ_ONLY NOT_VISIBLE GLOBAL_VAR(pfs_param.m_consumer_statement_digest_enabled), CMD_LINE(OPT_ARG), DEFAULT(true), PFS_TRAILING_PROPERTIES)
 
static Sys_var_long Sys_pfs_events_waits_history_long_size ("performance_schema_events_waits_history_long_size", "Number of rows in EVENTS_WAITS_HISTORY_LONG." " Use 0 to disable, -1 for automated sizing.", READ_ONLY GLOBAL_VAR(pfs_param.m_events_waits_history_long_sizing), CMD_LINE(REQUIRED_ARG), VALID_RANGE(-1, 1024 *1024), DEFAULT(PFS_AUTOSIZE_VALUE), BLOCK_SIZE(1), PFS_TRAILING_PROPERTIES)
 
static Sys_var_long Sys_pfs_events_waits_history_size ("performance_schema_events_waits_history_size", "Number of rows per thread in EVENTS_WAITS_HISTORY." " Use 0 to disable, -1 for automated sizing.", READ_ONLY GLOBAL_VAR(pfs_param.m_events_waits_history_sizing), CMD_LINE(REQUIRED_ARG), VALID_RANGE(-1, 1024), DEFAULT(PFS_AUTOSIZE_VALUE), BLOCK_SIZE(1), PFS_TRAILING_PROPERTIES)
 
static Sys_var_ulong Sys_pfs_max_cond_classes ("performance_schema_max_cond_classes", "Maximum number of condition instruments.", READ_ONLY GLOBAL_VAR(pfs_param.m_cond_class_sizing), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, 1024), DEFAULT(PFS_MAX_COND_CLASS), BLOCK_SIZE(1), PFS_TRAILING_PROPERTIES)
 
static Sys_var_long Sys_pfs_max_cond_instances ("performance_schema_max_cond_instances", "Maximum number of instrumented condition objects." " Use 0 to disable, -1 for automated scaling.", READ_ONLY GLOBAL_VAR(pfs_param.m_cond_sizing), CMD_LINE(REQUIRED_ARG), VALID_RANGE(-1, 1024 *1024), DEFAULT(PFS_AUTOSCALE_VALUE), BLOCK_SIZE(1), PFS_TRAILING_PROPERTIES)
 
static Sys_var_long Sys_pfs_max_program_instances ("performance_schema_max_program_instances", "Maximum number of instrumented programs." " Use 0 to disable, -1 for automated scaling.", READ_ONLY GLOBAL_VAR(pfs_param.m_program_sizing), CMD_LINE(REQUIRED_ARG), VALID_RANGE(-1, 1024 *1024), DEFAULT(PFS_AUTOSCALE_VALUE), BLOCK_SIZE(1), PFS_TRAILING_PROPERTIES)
 
static constexpr int num_prepared_stmt_limit = 4 * 1024 * 1024
 
static Sys_var_long Sys_pfs_max_prepared_stmt_instances ("performance_schema_max_prepared_statements_instances", "Maximum number of instrumented prepared statements." " Use 0 to disable, -1 for automated scaling.", READ_ONLY GLOBAL_VAR(pfs_param.m_prepared_stmt_sizing), CMD_LINE(REQUIRED_ARG), VALID_RANGE(-1, num_prepared_stmt_limit), DEFAULT(PFS_AUTOSCALE_VALUE), BLOCK_SIZE(1), PFS_TRAILING_PROPERTIES)
 
static Sys_var_ulong Sys_pfs_max_file_classes ("performance_schema_max_file_classes", "Maximum number of file instruments.", READ_ONLY GLOBAL_VAR(pfs_param.m_file_class_sizing), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, 1024), DEFAULT(PFS_MAX_FILE_CLASS), BLOCK_SIZE(1), PFS_TRAILING_PROPERTIES)
 
static Sys_var_ulong Sys_pfs_max_file_handles ("performance_schema_max_file_handles", "Maximum number of opened instrumented files.", READ_ONLY GLOBAL_VAR(pfs_param.m_file_handle_sizing), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, 1024 *1024), DEFAULT(PFS_MAX_FILE_HANDLE), BLOCK_SIZE(1), PFS_TRAILING_PROPERTIES)
 
static Sys_var_long Sys_pfs_max_file_instances ("performance_schema_max_file_instances", "Maximum number of instrumented files." " Use 0 to disable, -1 for automated scaling.", READ_ONLY GLOBAL_VAR(pfs_param.m_file_sizing), CMD_LINE(REQUIRED_ARG), VALID_RANGE(-1, 1024 *1024), DEFAULT(PFS_AUTOSCALE_VALUE), BLOCK_SIZE(1), PFS_TRAILING_PROPERTIES)
 
static Sys_var_long Sys_pfs_max_sockets ("performance_schema_max_socket_instances", "Maximum number of opened instrumented sockets." " Use 0 to disable, -1 for automated scaling.", READ_ONLY GLOBAL_VAR(pfs_param.m_socket_sizing), CMD_LINE(REQUIRED_ARG), VALID_RANGE(-1, 1024 *1024), DEFAULT(PFS_AUTOSCALE_VALUE), BLOCK_SIZE(1), PFS_TRAILING_PROPERTIES)
 
static Sys_var_ulong Sys_pfs_max_socket_classes ("performance_schema_max_socket_classes", "Maximum number of socket instruments.", READ_ONLY GLOBAL_VAR(pfs_param.m_socket_class_sizing), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, 1024), DEFAULT(PFS_MAX_SOCKET_CLASS), BLOCK_SIZE(1), PFS_TRAILING_PROPERTIES)
 
static Sys_var_ulong Sys_pfs_max_mutex_classes ("performance_schema_max_mutex_classes", "Maximum number of mutex instruments.", READ_ONLY GLOBAL_VAR(pfs_param.m_mutex_class_sizing), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, 1024), DEFAULT(PFS_MAX_MUTEX_CLASS), BLOCK_SIZE(1), PFS_TRAILING_PROPERTIES)
 
static Sys_var_long Sys_pfs_max_mutex_instances ("performance_schema_max_mutex_instances", "Maximum number of instrumented MUTEX objects." " Use 0 to disable, -1 for automated scaling.", READ_ONLY GLOBAL_VAR(pfs_param.m_mutex_sizing), CMD_LINE(REQUIRED_ARG), VALID_RANGE(-1, 100 *1024 *1024), DEFAULT(PFS_AUTOSCALE_VALUE), BLOCK_SIZE(1), PFS_TRAILING_PROPERTIES)
 
static Sys_var_ulong Sys_pfs_max_rwlock_classes ("performance_schema_max_rwlock_classes", "Maximum number of rwlock instruments.", READ_ONLY GLOBAL_VAR(pfs_param.m_rwlock_class_sizing), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, 1024), DEFAULT(PFS_MAX_RWLOCK_CLASS), BLOCK_SIZE(1), PFS_TRAILING_PROPERTIES)
 
static Sys_var_long Sys_pfs_max_rwlock_instances ("performance_schema_max_rwlock_instances", "Maximum number of instrumented RWLOCK objects." " Use 0 to disable, -1 for automated scaling.", READ_ONLY GLOBAL_VAR(pfs_param.m_rwlock_sizing), CMD_LINE(REQUIRED_ARG), VALID_RANGE(-1, 100 *1024 *1024), DEFAULT(PFS_AUTOSCALE_VALUE), BLOCK_SIZE(1), PFS_TRAILING_PROPERTIES)
 
static Sys_var_long Sys_pfs_max_table_handles ("performance_schema_max_table_handles", "Maximum number of opened instrumented tables." " Use 0 to disable, -1 for automated scaling.", READ_ONLY GLOBAL_VAR(pfs_param.m_table_sizing), CMD_LINE(REQUIRED_ARG), VALID_RANGE(-1, 1024 *1024), DEFAULT(PFS_AUTOSCALE_VALUE), BLOCK_SIZE(1), PFS_TRAILING_PROPERTIES)
 
static Sys_var_long Sys_pfs_max_table_instances ("performance_schema_max_table_instances", "Maximum number of instrumented tables." " Use 0 to disable, -1 for automated scaling.", READ_ONLY GLOBAL_VAR(pfs_param.m_table_share_sizing), CMD_LINE(REQUIRED_ARG), VALID_RANGE(-1, 1024 *1024), DEFAULT(PFS_AUTOSCALE_VALUE), BLOCK_SIZE(1), PFS_TRAILING_PROPERTIES)
 
static Sys_var_long Sys_pfs_max_table_lock_stat ("performance_schema_max_table_lock_stat", "Maximum number of lock statistics for instrumented tables." " Use 0 to disable, -1 for automated scaling.", READ_ONLY GLOBAL_VAR(pfs_param.m_table_lock_stat_sizing), CMD_LINE(REQUIRED_ARG), VALID_RANGE(-1, 1024 *1024), DEFAULT(PFS_AUTOSCALE_VALUE), BLOCK_SIZE(1), PFS_TRAILING_PROPERTIES)
 
static Sys_var_long Sys_pfs_max_index_stat ("performance_schema_max_index_stat", "Maximum number of index statistics for instrumented tables." " Use 0 to disable, -1 for automated scaling.", READ_ONLY GLOBAL_VAR(pfs_param.m_index_stat_sizing), CMD_LINE(REQUIRED_ARG), VALID_RANGE(-1, 1024 *1024), DEFAULT(PFS_AUTOSCALE_VALUE), BLOCK_SIZE(1), PFS_TRAILING_PROPERTIES)
 
static Sys_var_ulong Sys_pfs_max_thread_classes ("performance_schema_max_thread_classes", "Maximum number of thread instruments.", READ_ONLY GLOBAL_VAR(pfs_param.m_thread_class_sizing), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, 1024), DEFAULT(PFS_MAX_THREAD_CLASS), BLOCK_SIZE(1), PFS_TRAILING_PROPERTIES)
 
static Sys_var_long Sys_pfs_max_thread_instances ("performance_schema_max_thread_instances", "Maximum number of instrumented threads." " Use 0 to disable, -1 for automated scaling.", READ_ONLY GLOBAL_VAR(pfs_param.m_thread_sizing), CMD_LINE(REQUIRED_ARG), VALID_RANGE(-1, 1024 *1024), DEFAULT(PFS_AUTOSCALE_VALUE), BLOCK_SIZE(1), PFS_TRAILING_PROPERTIES)
 
static Sys_var_long Sys_pfs_setup_actors_size ("performance_schema_setup_actors_size", "Maximum number of rows in SETUP_ACTORS." " Use 0 to disable, -1 for automated scaling.", READ_ONLY GLOBAL_VAR(pfs_param.m_setup_actor_sizing), CMD_LINE(REQUIRED_ARG), VALID_RANGE(-1, 1024 *1024), DEFAULT(PFS_AUTOSCALE_VALUE), BLOCK_SIZE(1), PFS_TRAILING_PROPERTIES)
 
static Sys_var_long Sys_pfs_setup_objects_size ("performance_schema_setup_objects_size", "Maximum number of rows in SETUP_OBJECTS." " Use 0 to disable, -1 for automated scaling.", READ_ONLY GLOBAL_VAR(pfs_param.m_setup_object_sizing), CMD_LINE(REQUIRED_ARG), VALID_RANGE(-1, 1024 *1024), DEFAULT(PFS_AUTOSCALE_VALUE), BLOCK_SIZE(1), PFS_TRAILING_PROPERTIES)
 
static Sys_var_long Sys_pfs_accounts_size ("performance_schema_accounts_size", "Maximum number of instrumented user@host accounts." " Use 0 to disable, -1 for automated scaling.", READ_ONLY GLOBAL_VAR(pfs_param.m_account_sizing), CMD_LINE(REQUIRED_ARG), VALID_RANGE(-1, 1024 *1024), DEFAULT(PFS_AUTOSCALE_VALUE), BLOCK_SIZE(1), PFS_TRAILING_PROPERTIES)
 
static Sys_var_long Sys_pfs_hosts_size ("performance_schema_hosts_size", "Maximum number of instrumented hosts." " Use 0 to disable, -1 for automated scaling.", READ_ONLY GLOBAL_VAR(pfs_param.m_host_sizing), CMD_LINE(REQUIRED_ARG), VALID_RANGE(-1, 1024 *1024), DEFAULT(PFS_AUTOSCALE_VALUE), BLOCK_SIZE(1), PFS_TRAILING_PROPERTIES)
 
static Sys_var_long Sys_pfs_users_size ("performance_schema_users_size", "Maximum number of instrumented users." " Use 0 to disable, -1 for automated scaling.", READ_ONLY GLOBAL_VAR(pfs_param.m_user_sizing), CMD_LINE(REQUIRED_ARG), VALID_RANGE(-1, 1024 *1024), DEFAULT(PFS_AUTOSCALE_VALUE), BLOCK_SIZE(1), PFS_TRAILING_PROPERTIES)
 
static Sys_var_ulong Sys_pfs_max_stage_classes ("performance_schema_max_stage_classes", "Maximum number of stage instruments.", READ_ONLY GLOBAL_VAR(pfs_param.m_stage_class_sizing), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, 1024), DEFAULT(PFS_MAX_STAGE_CLASS), BLOCK_SIZE(1), PFS_TRAILING_PROPERTIES)
 
static Sys_var_long Sys_pfs_events_stages_history_long_size ("performance_schema_events_stages_history_long_size", "Number of rows in EVENTS_STAGES_HISTORY_LONG." " Use 0 to disable, -1 for automated sizing.", READ_ONLY GLOBAL_VAR(pfs_param.m_events_stages_history_long_sizing), CMD_LINE(REQUIRED_ARG), VALID_RANGE(-1, 1024 *1024), DEFAULT(PFS_AUTOSIZE_VALUE), BLOCK_SIZE(1), PFS_TRAILING_PROPERTIES)
 
static Sys_var_long Sys_pfs_events_stages_history_size ("performance_schema_events_stages_history_size", "Number of rows per thread in EVENTS_STAGES_HISTORY." " Use 0 to disable, -1 for automated sizing.", READ_ONLY GLOBAL_VAR(pfs_param.m_events_stages_history_sizing), CMD_LINE(REQUIRED_ARG), VALID_RANGE(-1, 1024), DEFAULT(PFS_AUTOSIZE_VALUE), BLOCK_SIZE(1), PFS_TRAILING_PROPERTIES)
 
static Sys_var_ulong Sys_pfs_max_statement_classes ("performance_schema_max_statement_classes", "Maximum number of statement instruments.", READ_ONLY GLOBAL_VAR(pfs_param.m_statement_class_sizing), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, 256), DEFAULT((ulong) SQLCOM_END+(ulong) COM_END+5+SP_PSI_STATEMENT_INFO_COUNT+CLONE_PSI_STATEMENT_COUNT), BLOCK_SIZE(1), PFS_TRAILING_PROPERTIES)
 Variable performance_schema_max_statement_classes. More...
 
static Sys_var_long Sys_pfs_events_statements_history_long_size ("performance_schema_events_statements_history_long_size", "Number of rows in EVENTS_STATEMENTS_HISTORY_LONG." " Use 0 to disable, -1 for automated sizing.", READ_ONLY GLOBAL_VAR(pfs_param.m_events_statements_history_long_sizing), CMD_LINE(REQUIRED_ARG), VALID_RANGE(-1, 1024 *1024), DEFAULT(PFS_AUTOSIZE_VALUE), BLOCK_SIZE(1), PFS_TRAILING_PROPERTIES)
 
static Sys_var_long Sys_pfs_events_statements_history_size ("performance_schema_events_statements_history_size", "Number of rows per thread in EVENTS_STATEMENTS_HISTORY." " Use 0 to disable, -1 for automated sizing.", READ_ONLY GLOBAL_VAR(pfs_param.m_events_statements_history_sizing), CMD_LINE(REQUIRED_ARG), VALID_RANGE(-1, 1024), DEFAULT(PFS_AUTOSIZE_VALUE), BLOCK_SIZE(1), PFS_TRAILING_PROPERTIES)
 
static Sys_var_ulong Sys_pfs_statement_stack_size ("performance_schema_max_statement_stack", "Number of rows per thread in EVENTS_STATEMENTS_CURRENT.", READ_ONLY GLOBAL_VAR(pfs_param.m_statement_stack_sizing), CMD_LINE(REQUIRED_ARG), VALID_RANGE(1, 256), DEFAULT(PFS_STATEMENTS_STACK_SIZE), BLOCK_SIZE(1), PFS_TRAILING_PROPERTIES)
 
static Sys_var_ulong Sys_pfs_max_memory_classes ("performance_schema_max_memory_classes", "Maximum number of memory pool instruments.", READ_ONLY GLOBAL_VAR(pfs_param.m_memory_class_sizing), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, 1024), DEFAULT(PFS_MAX_MEMORY_CLASS), BLOCK_SIZE(1), PFS_TRAILING_PROPERTIES)
 
static Sys_var_ulong Sys_pfs_max_meter_classes ("performance_schema_max_meter_classes", "Maximum number of meter source instruments.", READ_ONLY GLOBAL_VAR(pfs_param.m_meter_class_sizing), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, 64), DEFAULT(PFS_MAX_METER_CLASS), BLOCK_SIZE(1), PFS_TRAILING_PROPERTIES)
 
static Sys_var_ulong Sys_pfs_max_metric_classes ("performance_schema_max_metric_classes", "Maximum number of metric source instruments.", READ_ONLY GLOBAL_VAR(pfs_param.m_metric_class_sizing), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, 11000), DEFAULT(PFS_MAX_METRIC_CLASS), BLOCK_SIZE(1), PFS_TRAILING_PROPERTIES)
 
static Sys_var_long Sys_pfs_digest_size ("performance_schema_digests_size", "Size of the statement digest." " Use 0 to disable, -1 for automated sizing.", READ_ONLY GLOBAL_VAR(pfs_param.m_digest_sizing), CMD_LINE(REQUIRED_ARG), VALID_RANGE(-1, 1024 *1024), DEFAULT(PFS_AUTOSIZE_VALUE), BLOCK_SIZE(1), PFS_TRAILING_PROPERTIES)
 
static Sys_var_long Sys_pfs_events_transactions_history_long_size ("performance_schema_events_transactions_history_long_size", "Number of rows in EVENTS_TRANSACTIONS_HISTORY_LONG." " Use 0 to disable, -1 for automated sizing.", READ_ONLY GLOBAL_VAR(pfs_param.m_events_transactions_history_long_sizing), CMD_LINE(REQUIRED_ARG), VALID_RANGE(-1, 1024 *1024), DEFAULT(PFS_AUTOSIZE_VALUE), BLOCK_SIZE(1), PFS_TRAILING_PROPERTIES)
 
static Sys_var_long Sys_pfs_events_transactions_history_size ("performance_schema_events_transactions_history_size", "Number of rows per thread in EVENTS_TRANSACTIONS_HISTORY." " Use 0 to disable, -1 for automated sizing.", READ_ONLY GLOBAL_VAR(pfs_param.m_events_transactions_history_sizing), CMD_LINE(REQUIRED_ARG), VALID_RANGE(-1, 1024), DEFAULT(PFS_AUTOSIZE_VALUE), BLOCK_SIZE(1), PFS_TRAILING_PROPERTIES)
 
static Sys_var_long Sys_pfs_max_digest_length ("performance_schema_max_digest_length", "Maximum length considered for digest text, when stored in " "performance_schema tables.", READ_ONLY GLOBAL_VAR(pfs_param.m_max_digest_length), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, 1024 *1024), DEFAULT(1024), BLOCK_SIZE(1), PFS_TRAILING_PROPERTIES)
 
static Sys_var_ulong Sys_pfs_max_digest_sample_age ("performance_schema_max_digest_sample_age", "The time in seconds after which a previous query sample is considered old." " When the value is 0, queries are sampled once." " When the value is greater than zero, queries are re sampled if the" " last sample is more than performance_schema_max_digest_sample_age " "seconds old.", GLOBAL_VAR(pfs_param.m_max_digest_sample_age), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, 1024 *1024), DEFAULT(60), BLOCK_SIZE(1), PFS_TRAILING_PROPERTIES)
 
static Sys_var_long Sys_pfs_connect_attrs_size ("performance_schema_session_connect_attrs_size", "Size of session attribute string buffer per thread." " Use 0 to disable, -1 for automated sizing.", READ_ONLY GLOBAL_VAR(pfs_param.m_session_connect_attrs_sizing), CMD_LINE(REQUIRED_ARG), VALID_RANGE(-1, 1024 *1024), DEFAULT(PFS_AUTOSIZE_VALUE), BLOCK_SIZE(1), PFS_TRAILING_PROPERTIES)
 
static Sys_var_long Sys_pfs_max_metadata_locks ("performance_schema_max_metadata_locks", "Maximum number of metadata locks." " Use 0 to disable, -1 for automated scaling.", READ_ONLY GLOBAL_VAR(pfs_param.m_metadata_lock_sizing), CMD_LINE(REQUIRED_ARG), VALID_RANGE(-1, 100 *1024 *1024), DEFAULT(PFS_AUTOSCALE_VALUE), BLOCK_SIZE(1), PFS_TRAILING_PROPERTIES)
 
static Sys_var_long Sys_pfs_max_sql_text_length ("performance_schema_max_sql_text_length", "Maximum length of displayed sql text.", READ_ONLY GLOBAL_VAR(pfs_param.m_max_sql_text_length), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, 1024 *1024), DEFAULT(1024), BLOCK_SIZE(1), PFS_TRAILING_PROPERTIES)
 
static Sys_var_long Sys_pfs_error_size ("performance_schema_error_size", "Number of server errors instrumented.", READ_ONLY GLOBAL_VAR(pfs_param.m_error_sizing), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, 1024 *1024), DEFAULT(PFS_MAX_GLOBAL_SERVER_ERRORS), BLOCK_SIZE(1), PFS_TRAILING_PROPERTIES)
 
static Sys_var_ulong Sys_auto_increment_increment ("auto_increment_increment", "Auto-increment columns are incremented by this", HINT_UPDATEABLE SESSION_VAR(auto_increment_increment), CMD_LINE(OPT_ARG), VALID_RANGE(1, 65535), DEFAULT(1), BLOCK_SIZE(1), NO_MUTEX_GUARD, IN_BINLOG)
 
static Sys_var_ulong Sys_auto_increment_offset ("auto_increment_offset", "Offset added to Auto-increment columns. Used when " "auto-increment-increment != 1", HINT_UPDATEABLE SESSION_VAR(auto_increment_offset), CMD_LINE(OPT_ARG), VALID_RANGE(1, 65535), DEFAULT(1), BLOCK_SIZE(1), NO_MUTEX_GUARD, IN_BINLOG)
 
static Sys_var_bool Sys_windowing_use_high_precision ("windowing_use_high_precision", "For SQL window functions, determines whether to enable inversion " "optimization for moving window frames also for floating values.", HINT_UPDATEABLE SESSION_VAR(windowing_use_high_precision), CMD_LINE(OPT_ARG), DEFAULT(true))
 
static Sys_var_uint Sys_cte_max_recursion_depth ("cte_max_recursion_depth", "Abort a recursive common table expression " "if it does more than this number of iterations.", HINT_UPDATEABLE SESSION_VAR(cte_max_recursion_depth), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, UINT_MAX32), DEFAULT(1000), BLOCK_SIZE(1))
 
static Sys_var_bool Sys_automatic_sp_privileges ("automatic_sp_privileges", "Creating and dropping stored procedures alters ACLs", GLOBAL_VAR(sp_automatic_privileges), CMD_LINE(OPT_ARG), DEFAULT(true))
 
static Sys_var_ulong Sys_back_log ("back_log", "The number of outstanding connection requests " "MySQL can have. This comes into play when the main MySQL thread " "gets very many connection requests in a very short time", READ_ONLY GLOBAL_VAR(back_log), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, 65535), DEFAULT(0), BLOCK_SIZE(1))
 
static Sys_var_charptr Sys_basedir ("basedir", "Path to installation directory. All paths are " "usually resolved relative to this", READ_ONLY NON_PERSIST GLOBAL_VAR(mysql_home_ptr), CMD_LINE(REQUIRED_ARG, 'b'), IN_FS_CHARSET, DEFAULT(nullptr))
 
static PolyLock_mutex Plock_default_password_lifetime & LOCK_default_password_lifetime
 
static Sys_var_uint Sys_default_password_lifetime ("default_password_lifetime", "The number of days after which the " "password will expire.", GLOBAL_VAR(default_password_lifetime), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, UINT_MAX16), DEFAULT(0), BLOCK_SIZE(1), &Plock_default_password_lifetime)
 
static Sys_var_charptr Sys_my_bind_addr ("bind_address", "IP address(es) to bind to. Syntax: address[,address]...," " where address can be an IPv4 address, IPv6 address," " host name or one of the wildcard values *, ::, 0.0.0.0." " In case more than one address is specified in a" " comma-separated list, wildcard values are not allowed." " Every address can have optional network namespace separated" " by the delimiter / from the address value. E.g., the following value" " 192.168.1.1/red,172.16.1.1/green,193.168.1.1 specifies three IP" " addresses to listen for incoming TCP connections two of that have" " to be placed in corresponding namespaces: the address 192.168.1.1" " must be placed into the namespace red and the address 172.16.1.1" " must be placed into the namespace green. Using of network namespace" " requires its support from underlying Operating System. Attempt to specify" " a network namespace for a platform that doesn't support it results in" " error during socket creation.", READ_ONLY NON_PERSIST GLOBAL_VAR(my_bind_addr_str), CMD_LINE(REQUIRED_ARG), IN_FS_CHARSET, DEFAULT(MY_BIND_ALL_ADDRESSES))
 
static Sys_var_charptr Sys_admin_addr ("admin_address", "IP address to bind to for service connection. Address can be an IPv4" " address, IPv6 address, or host name. Wildcard values *, ::, 0.0.0.0" " are not allowed. Address value can have following optional network" " namespace separated by the delimiter / from the address value." " E.g., the following value 192.168.1.1/red specifies IP addresses to" " listen for incoming TCP connections that have to be placed into" " the namespace 'red'. Using of network namespace requires its support" " from underlying Operating System. Attempt to specify a network namespace" " for a platform that doesn't support it results in error during socket" " creation.", READ_ONLY NON_PERSIST GLOBAL_VAR(my_admin_bind_addr_str), CMD_LINE(REQUIRED_ARG), IN_FS_CHARSET, DEFAULT(nullptr))
 
static Sys_var_uint Sys_admin_port ("admin_port", "Port number to use for service connection," " built-in default (" STRINGIFY_ARG(MYSQL_ADMIN_PORT) ")", READ_ONLY NON_PERSIST GLOBAL_VAR(mysqld_admin_port), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, 65535), DEFAULT(MYSQL_ADMIN_PORT), BLOCK_SIZE(1))
 
static Sys_var_bool Sys_use_separate_thread_for_admin ("create_admin_listener_thread", "Use a dedicated thread for listening incoming connections on admin" " interface", READ_ONLY NON_PERSIST GLOBAL_VAR(listen_admin_interface_in_separate_thread), CMD_LINE(OPT_ARG), DEFAULT(false))
 
static Sys_var_bool Sys_password_require_current ("password_require_current", "Current password is needed to be specified in order to change it", GLOBAL_VAR(password_require_current), CMD_LINE(OPT_ARG), DEFAULT(false))
 
static PolyLock_mutex Plock_partial_revokes & LOCK_partial_revokes
 We also modify the global variable outside of sys_var structure. More...
 
static Sys_var_bool Sys_partial_revokes ("partial_revokes", "Access of database objects can be restricted, " "even if user has global privileges granted.", GLOBAL_VAR(opt_partial_revokes), CMD_LINE(OPT_ARG), DEFAULT(DEFAULT_PARTIAL_REVOKES), &Plock_partial_revokes, IN_BINLOG, ON_CHECK(check_partial_revokes), ON_UPDATE(partial_revokes_update), nullptr, sys_var::PARSE_EARLY)
 
static Sys_var_ulong Sys_binlog_cache_size ("binlog_cache_size", "The size of the transactional cache for " "updates to transactional engines for the binary log. " "If you often use transactions containing many statements, " "you can increase this to get more performance", GLOBAL_VAR(binlog_cache_size), CMD_LINE(REQUIRED_ARG), VALID_RANGE(IO_SIZE, ULONG_MAX), DEFAULT(32768), BLOCK_SIZE(IO_SIZE), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(fix_binlog_cache_size))
 
static Sys_var_ulong Sys_binlog_stmt_cache_size ("binlog_stmt_cache_size", "The size of the statement cache for " "updates to non-transactional engines for the binary log. " "If you often use statements updating a great number of rows, " "you can increase this to get more performance", GLOBAL_VAR(binlog_stmt_cache_size), CMD_LINE(REQUIRED_ARG), VALID_RANGE(IO_SIZE, ULONG_MAX), DEFAULT(32768), BLOCK_SIZE(IO_SIZE), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(fix_binlog_stmt_cache_size))
 
static Sys_var_int32 Sys_binlog_max_flush_queue_time ("binlog_max_flush_queue_time", "The maximum time that the binary log group commit will keep reading" " transactions before it flush the transactions to the binary log (and" " optionally sync, depending on the value of sync_binlog).", GLOBAL_VAR(opt_binlog_max_flush_queue_time), CMD_LINE(REQUIRED_ARG, OPT_BINLOG_MAX_FLUSH_QUEUE_TIME), VALID_RANGE(0, 100000), DEFAULT(0), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(nullptr), DEPRECATED_VAR(""))
 
static Sys_var_long Sys_binlog_group_commit_sync_delay ("binlog_group_commit_sync_delay", "The number of microseconds the server waits for the " "binary log group commit sync queue to fill before " "continuing. Default: 0. Min: 0. Max: 1000000.", GLOBAL_VAR(opt_binlog_group_commit_sync_delay), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, 1000000), DEFAULT(0), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG)
 
static Sys_var_ulong Sys_binlog_group_commit_sync_no_delay_count ("binlog_group_commit_sync_no_delay_count", "If there are this many transactions in the commit sync " "queue and the server is waiting for more transactions " "to be enqueued (as set using --binlog-group-commit-sync-delay), " "the commit procedure resumes.", GLOBAL_VAR(opt_binlog_group_commit_sync_no_delay_count), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, 100000), DEFAULT(0), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG)
 
static Sys_var_test_flag Sys_core_file ("core_file", "write a core-file on crashes", TEST_CORE_ON_SIGNAL)
 
static Sys_var_enum Sys_binlog_format ("binlog_format", "The format used when writing the binary log. ROW writes each changed " "row in a binary format. STATEMENT writes SQL statements. MIXED writes " "SQL statements for most statements, and row format for statements that " "cannot be replayed in a deterministic manner using SQL. If NDBCLUSTER " "is enabled and binlog-format is MIXED, the format switches to row-based " "and back implicitly for each query accessing an NDBCLUSTER table." " This option is deprecated and will be removed in a future version.", SESSION_VAR(binlog_format), CMD_LINE(REQUIRED_ARG, OPT_BINLOG_FORMAT), binlog_format_names, DEFAULT(BINLOG_FORMAT_ROW), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(binlog_format_check), ON_UPDATE(fix_binlog_format_after_update), DEPRECATED_VAR(""))
 
static const char * rbr_exec_mode_names [] = {"STRICT", "IDEMPOTENT", nullptr}
 
static Sys_var_enum rbr_exec_mode ("rbr_exec_mode", "Modes for how row events should be executed. Legal values " "are STRICT (default) and IDEMPOTENT. In IDEMPOTENT mode, " "the server will not throw errors for operations that are idempotent. " "In STRICT mode, server will throw errors for the operations that " "cause a conflict.", SESSION_VAR(rbr_exec_mode_options), NO_CMD_LINE, rbr_exec_mode_names, DEFAULT(RBR_EXEC_MODE_STRICT), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(prevent_global_rbr_exec_mode_idempotent), ON_UPDATE(nullptr))
 
static const char * binlog_row_image_names []
 
static Sys_var_enum Sys_binlog_row_image ("binlog_row_image", "Controls whether rows should be logged in 'FULL', 'NOBLOB' or " "'MINIMAL' formats. 'FULL', means that all columns in the before " "and after image are logged. 'NOBLOB', means that mysqld avoids logging " "blob columns whenever possible (e.g. blob column was not changed or " "is not part of primary key). 'MINIMAL', means that a PK equivalent (PK " "columns or full row if there is no PK in the table) is logged in the " "before image, and only changed columns are logged in the after image. " "(Default: FULL).", SESSION_VAR(binlog_row_image), CMD_LINE(REQUIRED_ARG), binlog_row_image_names, DEFAULT(BINLOG_ROW_IMAGE_FULL), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_binlog_row_image), ON_UPDATE(nullptr))
 
static const char * binlog_row_metadata_names [] = {"MINIMAL", "FULL", NullS}
 
static Sys_var_enum Sys_binlog_row_metadata ("binlog_row_metadata", "Controls how much type information is written to the binary log when " "using ROW format. FULL causes all metadata to be logged. MINIMAL means " "that only metadata actually needed by replicas is logged.", GLOBAL_VAR(binlog_row_metadata), CMD_LINE(REQUIRED_ARG), binlog_row_metadata_names, DEFAULT(BINLOG_ROW_METADATA_MINIMAL), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(nullptr))
 
static Sys_var_bool Sys_binlog_trx_compression ("binlog_transaction_compression", "Whether to compress transactions or not. Transactions are compressed " "using the ZSTD compression algorythm.", SESSION_VAR(binlog_trx_compression), CMD_LINE(OPT_ARG), DEFAULT(false), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_binlog_trx_compression))
 
static Sys_var_uint Sys_binlog_transaction_compression_level_zstd ("binlog_transaction_compression_level_zstd", "Specifies the transaction compression level for ZSTD " "transaction compression in the binary log.", SESSION_VAR(binlog_trx_compression_level_zstd), CMD_LINE(REQUIRED_ARG), VALID_RANGE(1, 22), DEFAULT(mysql::binlog::event::compression::Zstd_comp::default_compression_level), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_binlog_trx_compression), ON_UPDATE(nullptr))
 
static const char * session_track_gtids_names []
 
static Sys_var_enum Sys_session_track_gtids ("session_track_gtids", "Controls the amount of global transaction ids to be " "included in the response packet sent by the server." "(Default: OFF).", SESSION_VAR(session_track_gtids), CMD_LINE(REQUIRED_ARG), session_track_gtids_names, DEFAULT(SESSION_TRACK_GTIDS_OFF), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_outside_trx), ON_UPDATE(on_session_track_gtids_update))
 
static Sys_var_bool Sys_binlog_direct ("binlog_direct_non_transactional_updates", "Causes updates to non-transactional engines using statement format to " "be written directly to binary log, after executing them and before " "committing the transaction. Before using this option make sure " "that there are no dependencies between transactional and " "non-transactional tables such as in the statement INSERT INTO t_myisam " "SELECT * FROM t_innodb; otherwise, replicas may diverge.", SESSION_VAR(binlog_direct_non_trans_update), CMD_LINE(OPT_ARG), DEFAULT(false), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(binlog_direct_check))
 
static Sys_var_bool Sys_explicit_defaults_for_timestamp ("explicit_defaults_for_timestamp", "This option causes CREATE TABLE to create all TIMESTAMP columns " "as NULL with DEFAULT NULL attribute, Without this option, " "TIMESTAMP columns are NOT NULL and have implicit DEFAULT clauses. " "The old behavior is deprecated. " "The variable can only be set by users having the SUPER privilege.", SESSION_VAR(explicit_defaults_for_timestamp), CMD_LINE(OPT_ARG), DEFAULT(true), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_explicit_defaults_for_timestamp))
 This variable is read only to users. More...
 
static Sys_var_bool Sys_binlog_rows_query ("binlog_rows_query_log_events", "Allow writing of Rows_query_log events into binary log.", SESSION_VAR(binlog_rows_query_log_events), CMD_LINE(OPT_ARG), DEFAULT(false), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_session_admin))
 
static Sys_var_bool Sys_binlog_order_commits ("binlog_order_commits", "Issue internal commit calls in the same order as transactions are" " written to the binary log. Default is to order commits.", GLOBAL_VAR(opt_binlog_order_commits), CMD_LINE(OPT_ARG), DEFAULT(true))
 
static Sys_var_ulong Sys_bulk_insert_buff_size ("bulk_insert_buffer_size", "Size of tree cache used in bulk " "insert optimisation. Note that this is a limit per thread!", HINT_UPDATEABLE SESSION_VAR(bulk_insert_buff_size), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, ULONG_MAX), DEFAULT(8192 *1024), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_session_admin))
 
static Sys_var_charptr Sys_character_sets_dir ("character_sets_dir", "Directory where character sets are", READ_ONLY NON_PERSIST GLOBAL_VAR(charsets_dir), CMD_LINE(REQUIRED_ARG), IN_FS_CHARSET, DEFAULT(nullptr))
 
static Sys_var_ulong Sys_select_into_buffer_size ("select_into_buffer_size", "Buffer size for SELECT INTO OUTFILE/DUMPFILE.", HINT_UPDATEABLE SESSION_VAR(select_into_buffer_size), CMD_LINE(OPT_ARG), VALID_RANGE(IO_SIZE *2, INT_MAX32), DEFAULT(128 *1024), BLOCK_SIZE(IO_SIZE), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_session_admin_no_super))
 
static Sys_var_bool Sys_select_into_disk_sync ("select_into_disk_sync", "Synchronize flushed buffer with disk for SELECT INTO OUTFILE/DUMPFILE.", HINT_UPDATEABLE SESSION_VAR(select_into_disk_sync), CMD_LINE(OPT_ARG), DEFAULT(false))
 
static Sys_var_uint Sys_select_into_disk_sync_delay ("select_into_disk_sync_delay", "The delay in milliseconds after each buffer sync " "for SELECT INTO OUTFILE/DUMPFILE. Requires select_into_sync_disk = ON.", HINT_UPDATEABLE SESSION_VAR(select_into_disk_sync_delay), CMD_LINE(OPT_ARG), VALID_RANGE(0, LONG_TIMEOUT), DEFAULT(0), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_session_admin_no_super))
 
static CHARSET_INFOcharset_system_default = &my_charset_utf8mb3_general_ci
 
static Sys_var_struct< CHARSET_INFO, Get_csname > Sys_character_set_system ("character_set_system", "The character set used by the server " "for storing identifiers", READ_ONLY NON_PERSIST GLOBAL_VAR(system_charset_info), NO_CMD_LINE, DEFAULT(&charset_system_default))
 
static Sys_var_struct< CHARSET_INFO, Get_csname > Sys_character_set_server ("character_set_server", "The default character set", PERSIST_AS_READONLY SESSION_VAR(collation_server), NO_CMD_LINE, DEFAULT(&default_charset_info), NO_MUTEX_GUARD, IN_BINLOG, ON_CHECK(check_charset_not_null))
 
static Sys_var_struct< CHARSET_INFO, Get_csname > Sys_character_set_database ("character_set_database", " The character set used by the default database", SESSION_VAR(collation_database), NO_CMD_LINE, DEFAULT(&default_charset_info), NO_MUTEX_GUARD, IN_BINLOG, ON_CHECK(check_charset_db), ON_UPDATE(update_deprecated))
 
static Sys_var_struct< CHARSET_INFO, Get_csname > Sys_character_set_client ("character_set_client", "The character set for statements " "that arrive from the client", SESSION_VAR(character_set_client), NO_CMD_LINE, DEFAULT(&default_charset_info), NO_MUTEX_GUARD, IN_BINLOG, ON_CHECK(check_cs_client), ON_UPDATE(fix_thd_charset))
 
static Sys_var_struct< CHARSET_INFO, Get_csname > Sys_character_set_connection ("character_set_connection", "The character set used for " "literals that do not have a character set introducer and for " "number-to-string conversion", SESSION_VAR(collation_connection), NO_CMD_LINE, DEFAULT(&default_charset_info), NO_MUTEX_GUARD, IN_BINLOG, ON_CHECK(check_charset_not_null), ON_UPDATE(fix_thd_charset))
 
static Sys_var_struct< CHARSET_INFO, Get_csname > Sys_character_set_results ("character_set_results", "The character set used for returning " "query results to the client", SESSION_VAR(character_set_results), NO_CMD_LINE, DEFAULT(&default_charset_info), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_charset))
 
static Sys_var_struct< CHARSET_INFO, Get_csname > Sys_character_set_filesystem ("character_set_filesystem", "The filesystem character set", SESSION_VAR(character_set_filesystem), NO_CMD_LINE, DEFAULT(&character_set_filesystem), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_cs_filesystem), ON_UPDATE(fix_thd_charset))
 
static const char * completion_type_names []
 
static Sys_var_enum Sys_completion_type ("completion_type", "The transaction completion type, one of " "NO_CHAIN, CHAIN, RELEASE", SESSION_VAR(completion_type), CMD_LINE(REQUIRED_ARG), completion_type_names, DEFAULT(0))
 
static Sys_var_struct< CHARSET_INFO, Get_name > Sys_collation_connection ("collation_connection", "The collation of the connection " "character set", SESSION_VAR(collation_connection), NO_CMD_LINE, DEFAULT(&default_charset_info), NO_MUTEX_GUARD, IN_BINLOG, ON_CHECK(check_collation_not_null), ON_UPDATE(fix_thd_charset))
 
static Sys_var_struct< CHARSET_INFO, Get_name > Sys_collation_database ("collation_database", "The collation of the database " "character set", SESSION_VAR(collation_database), NO_CMD_LINE, DEFAULT(&default_charset_info), NO_MUTEX_GUARD, IN_BINLOG, ON_CHECK(check_collation_db), ON_UPDATE(update_deprecated))
 
static Sys_var_struct< CHARSET_INFO, Get_name > Sys_collation_server ("collation_server", "The server default collation", SESSION_VAR(collation_server), NO_CMD_LINE, DEFAULT(&default_charset_info), NO_MUTEX_GUARD, IN_BINLOG, ON_CHECK(check_collation_not_null))
 
static const char * concurrent_insert_names []
 
static Sys_var_enum Sys_concurrent_insert ("concurrent_insert", "Use concurrent insert with MyISAM. Possible " "values are NEVER, AUTO, ALWAYS", GLOBAL_VAR(myisam_concurrent_insert), CMD_LINE(OPT_ARG), concurrent_insert_names, DEFAULT(1))
 
static Sys_var_ulong Sys_connect_timeout ("connect_timeout", "The number of seconds the mysqld server is waiting for a connect " "packet before responding with 'Bad handshake'", GLOBAL_VAR(connect_timeout), CMD_LINE(REQUIRED_ARG), VALID_RANGE(2, LONG_TIMEOUT), DEFAULT(CONNECT_TIMEOUT), BLOCK_SIZE(1))
 
static Sys_var_ulong Sys_information_schema_stats_expiry ("information_schema_stats_expiry", "The number of seconds after which mysqld server will fetch " "data from storage engine and replace the data in cache.", SESSION_VAR(information_schema_stats_expiry), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, LONG_TIMEOUT), DEFAULT(24 *60 *60), BLOCK_SIZE(1))
 
static Sys_var_charptr Sys_datadir ("datadir", "Path to the database root directory", READ_ONLY NON_PERSIST GLOBAL_VAR(mysql_real_data_home_ptr), CMD_LINE(REQUIRED_ARG, 'h'), IN_FS_CHARSET, DEFAULT(mysql_real_data_home))
 
static Sys_var_dbug Sys_dbug ("debug", "Debug log", sys_var::SESSION, CMD_LINE(OPT_ARG, '#'), DEFAULT(""), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_session_admin))
 
static const char * delay_key_write_names [] = {"OFF", "ON", "ALL", NullS}
 
static Sys_var_enum Sys_delay_key_write ("delay_key_write", "Type of DELAY_KEY_WRITE", GLOBAL_VAR(delay_key_write_options), CMD_LINE(OPT_ARG), delay_key_write_names, DEFAULT(DELAY_KEY_WRITE_ON), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(fix_delay_key_write))
 
static Sys_var_ulong Sys_delayed_insert_limit ("delayed_insert_limit", "After inserting delayed_insert_limit rows, the INSERT DELAYED " "handler will check if there are any SELECT statements pending. " "If so, it allows these to execute before continuing. " "This variable is deprecated along with INSERT DELAYED.", GLOBAL_VAR(delayed_insert_limit), CMD_LINE(REQUIRED_ARG), VALID_RANGE(1, ULONG_MAX), DEFAULT(DELAYED_LIMIT), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(nullptr), DEPRECATED_VAR(""))
 
static Sys_var_ulong Sys_delayed_insert_timeout ("delayed_insert_timeout", "How long a INSERT DELAYED thread should wait for INSERT statements " "before terminating. " "This variable is deprecated along with INSERT DELAYED.", GLOBAL_VAR(delayed_insert_timeout), CMD_LINE(REQUIRED_ARG), VALID_RANGE(1, LONG_TIMEOUT), DEFAULT(DELAYED_WAIT_TIMEOUT), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(nullptr), DEPRECATED_VAR(""))
 
static Sys_var_ulong Sys_delayed_queue_size ("delayed_queue_size", "What size queue (in rows) should be allocated for handling INSERT " "DELAYED. If the queue becomes full, any client that does INSERT " "DELAYED will wait until there is room in the queue again. " "This variable is deprecated along with INSERT DELAYED.", GLOBAL_VAR(delayed_queue_size), CMD_LINE(REQUIRED_ARG), VALID_RANGE(1, ULONG_MAX), DEFAULT(DELAYED_QUEUE_SIZE), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(nullptr), DEPRECATED_VAR(""))
 
static const char * event_scheduler_names [] = {"OFF", "ON", "DISABLED", NullS}
 
static Sys_var_enum Sys_event_scheduler ("event_scheduler", "Enable the event scheduler. Possible values are " "ON, OFF, and DISABLED (keep the event scheduler completely " "deactivated, it cannot be activated run-time)", GLOBAL_VAR(Events::opt_event_scheduler), CMD_LINE(OPT_ARG), event_scheduler_names, DEFAULT(Events::EVENTS_ON), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(event_scheduler_check), ON_UPDATE(event_scheduler_update))
 
static Sys_var_ulong Sys_binlog_expire_logs_seconds ("binlog_expire_logs_seconds", "If non-zero, binary logs will be purged after binlog_expire_logs_seconds" " seconds; Purges happen at startup and at binary log rotation.", GLOBAL_VAR(binlog_expire_logs_seconds), CMD_LINE(REQUIRED_ARG, OPT_BINLOG_EXPIRE_LOGS_SECONDS), VALID_RANGE(0, 0xFFFFFFFF), DEFAULT(2592000), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(nullptr))
 
static Sys_var_bool Sys_binlog_expire_logs_auto_purge ("binlog_expire_logs_auto_purge", "Controls whether the server shall automatically purge binary log " "files or not. If this variable is set to FALSE then the server will " "not purge binary log files automatically.", GLOBAL_VAR(opt_binlog_expire_logs_auto_purge), CMD_LINE(OPT_ARG), DEFAULT(true))
 
static Sys_var_bool Sys_flush ("flush", "Flush MyISAM tables to disk between SQL commands", GLOBAL_VAR(myisam_flush), CMD_LINE(OPT_ARG), DEFAULT(false))
 
static Sys_var_ulong Sys_flush_time ("flush_time", "A dedicated thread is created to flush all tables at the " "given interval", GLOBAL_VAR(flush_time), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, LONG_TIMEOUT), DEFAULT(0), BLOCK_SIZE(1))
 
static Sys_var_charptr Sys_ft_boolean_syntax ("ft_boolean_syntax", "List of operators for " "MATCH ... AGAINST ( ... IN BOOLEAN MODE)", GLOBAL_VAR(ft_boolean_syntax), CMD_LINE(REQUIRED_ARG), IN_SYSTEM_CHARSET, DEFAULT(DEFAULT_FTB_SYNTAX), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_ftb_syntax))
 
static Sys_var_ulong Sys_ft_max_word_len ("ft_max_word_len", "The maximum length of the word to be included in a FULLTEXT index. " "Note: FULLTEXT indexes must be rebuilt after changing this variable", READ_ONLY GLOBAL_VAR(ft_max_word_len), CMD_LINE(REQUIRED_ARG), VALID_RANGE(10, HA_FT_MAXCHARLEN), DEFAULT(HA_FT_MAXCHARLEN), BLOCK_SIZE(1))
 
static Sys_var_ulong Sys_ft_min_word_len ("ft_min_word_len", "The minimum length of the word to be included in a FULLTEXT index. " "Note: FULLTEXT indexes must be rebuilt after changing this variable", READ_ONLY GLOBAL_VAR(ft_min_word_len), CMD_LINE(REQUIRED_ARG), VALID_RANGE(1, HA_FT_MAXCHARLEN), DEFAULT(4), BLOCK_SIZE(1))
 
static Sys_var_ulong Sys_ft_query_expansion_limit ("ft_query_expansion_limit", "Number of best matches to use for query expansion", READ_ONLY GLOBAL_VAR(ft_query_expansion_limit), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, 1000), DEFAULT(20), BLOCK_SIZE(1))
 
static Sys_var_charptr Sys_ft_stopword_file ("ft_stopword_file", "Use stopwords from this file instead of built-in list", READ_ONLY NON_PERSIST GLOBAL_VAR(ft_stopword_file), CMD_LINE(REQUIRED_ARG), IN_FS_CHARSET, DEFAULT(nullptr))
 
static PolyLock_rwlock PLock_sys_init_connect & LOCK_sys_init_connect
 
static Sys_var_lexstring Sys_init_connect ("init_connect", "Command(s) that are executed for each " "new connection", GLOBAL_VAR(opt_init_connect), CMD_LINE(REQUIRED_ARG), IN_SYSTEM_CHARSET, DEFAULT(""), &PLock_sys_init_connect, NOT_IN_BINLOG, ON_CHECK(check_init_string))
 
static Sys_var_charptr Sys_init_file ("init_file", "Read SQL commands from this file at startup", READ_ONLY NON_PERSIST GLOBAL_VAR(opt_init_file), CMD_LINE(REQUIRED_ARG), IN_FS_CHARSET, DEFAULT(nullptr))
 
static PolyLock_rwlock PLock_sys_init_replica & LOCK_sys_init_replica
 
static Sys_var_lexstring Sys_init_replica ("init_replica", "Command(s) that are executed by the replication applier thread " "each time the applier threads start.", GLOBAL_VAR(opt_init_replica), CMD_LINE(REQUIRED_ARG), IN_SYSTEM_CHARSET, DEFAULT(""), &PLock_sys_init_replica, NOT_IN_BINLOG, ON_CHECK(check_init_string))
 
static Sys_var_deprecated_alias Sys_init_slave ("init_slave", Sys_init_replica)
 
static Sys_var_ulong Sys_interactive_timeout ("interactive_timeout", "The number of seconds the server waits for activity on an interactive " "connection before closing it", SESSION_VAR(net_interactive_timeout), CMD_LINE(REQUIRED_ARG), VALID_RANGE(1, LONG_TIMEOUT), DEFAULT(NET_WAIT_TIMEOUT), BLOCK_SIZE(1))
 
static Sys_var_ulong Sys_join_buffer_size ("join_buffer_size", "The size of the buffer that is used for full joins", HINT_UPDATEABLE SESSION_VAR(join_buff_size), CMD_LINE(REQUIRED_ARG), VALID_RANGE(128, ULONG_MAX), DEFAULT(256 *1024), BLOCK_SIZE(128))
 
static Sys_var_keycache Sys_key_buffer_size ("key_buffer_size", "The size of the buffer used for " "index blocks for MyISAM tables. Increase this to get better index " "handling (for all reads and multiple writes) to as much as you can " "afford", KEYCACHE_VAR(param_buff_size), CMD_LINE(REQUIRED_ARG, OPT_KEY_BUFFER_SIZE), VALID_RANGE(0, SIZE_T_MAX), DEFAULT(KEY_CACHE_SIZE), BLOCK_SIZE(IO_SIZE), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(update_buffer_size))
 
static Sys_var_keycache Sys_key_cache_block_size ("key_cache_block_size", "The default size of key cache blocks", KEYCACHE_VAR(param_block_size), CMD_LINE(REQUIRED_ARG, OPT_KEY_CACHE_BLOCK_SIZE), VALID_RANGE(512, 1024 *16), DEFAULT(KEY_CACHE_BLOCK_SIZE), BLOCK_SIZE(512), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(update_keycache_param))
 
static Sys_var_keycache Sys_key_cache_division_limit ("key_cache_division_limit", "The minimum percentage of warm blocks in key cache", KEYCACHE_VAR(param_division_limit), CMD_LINE(REQUIRED_ARG, OPT_KEY_CACHE_DIVISION_LIMIT), VALID_RANGE(1, 100), DEFAULT(100), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(update_keycache_param))
 
static Sys_var_keycache Sys_key_cache_age_threshold ("key_cache_age_threshold", "This characterizes the number of " "hits a hot block has to be untouched until it is considered aged " "enough to be downgraded to a warm block. This specifies the " "percentage ratio of that number of hits to the total number of " "blocks in key cache", KEYCACHE_VAR(param_age_threshold), CMD_LINE(REQUIRED_ARG, OPT_KEY_CACHE_AGE_THRESHOLD), VALID_RANGE(100, ULONG_MAX), DEFAULT(300), BLOCK_SIZE(100), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(update_keycache_param))
 
static Sys_var_bool Sys_large_files_support ("large_files_support", "Whether mysqld was compiled with options for large file support", READ_ONLY NON_PERSIST GLOBAL_VAR(opt_large_files), NO_CMD_LINE, DEFAULT(sizeof(my_off_t) > 4))
 
static Sys_var_uint Sys_large_page_size ("large_page_size", "If large page support is enabled, this shows the size of memory pages", READ_ONLY NON_PERSIST GLOBAL_VAR(opt_large_page_size), NO_CMD_LINE, VALID_RANGE(0, UINT_MAX), DEFAULT(0), BLOCK_SIZE(1))
 
static Sys_var_bool Sys_large_pages ("large_pages", "Enable support for large pages", READ_ONLY GLOBAL_VAR(opt_large_pages), IF_WIN(NO_CMD_LINE, CMD_LINE(OPT_ARG)), DEFAULT(false))
 
static Sys_var_charptr Sys_language ("lc_messages_dir", "Directory where error messages are", READ_ONLY NON_PERSIST GLOBAL_VAR(lc_messages_dir_ptr), CMD_LINE(REQUIRED_ARG, OPT_LC_MESSAGES_DIRECTORY), IN_FS_CHARSET, DEFAULT(nullptr))
 
static Sys_var_bool Sys_local_infile ("local_infile", "Enable LOAD DATA LOCAL INFILE", GLOBAL_VAR(opt_local_infile), CMD_LINE(OPT_ARG), DEFAULT(false))
 
static Sys_var_ulong Sys_lock_wait_timeout ("lock_wait_timeout", "Timeout in seconds to wait for a lock before returning an error.", HINT_UPDATEABLE SESSION_VAR(lock_wait_timeout), CMD_LINE(REQUIRED_ARG), VALID_RANGE(1, LONG_TIMEOUT), DEFAULT(LONG_TIMEOUT), BLOCK_SIZE(1))
 
static Sys_var_bool Sys_locked_in_memory ("locked_in_memory", "Whether mysqld was locked in memory with --memlock", READ_ONLY NON_PERSIST GLOBAL_VAR(locked_in_memory), NO_CMD_LINE, DEFAULT(false))
 
static Sys_var_bool Sys_log_bin ("log_bin", "Whether the binary log is enabled", READ_ONLY NON_PERSIST GLOBAL_VAR(opt_bin_log), NO_CMD_LINE, DEFAULT(true))
 
static Sys_var_ulong Sys_rpl_stop_replica_timeout ("rpl_stop_replica_timeout", "Timeout in seconds to wait for replication threads to stop, before " "STOP REPLICA returns a warning.", GLOBAL_VAR(rpl_stop_replica_timeout), CMD_LINE(REQUIRED_ARG), VALID_RANGE(2, LONG_TIMEOUT), DEFAULT(LONG_TIMEOUT), BLOCK_SIZE(1))
 
static Sys_var_deprecated_alias Sys_rpl_stop_slave_timeout ("rpl_stop_slave_timeout", Sys_rpl_stop_replica_timeout)
 
static Sys_var_enum Sys_binlog_error_action ("binlog_error_action", "When statements cannot be written to the binary log due to a fatal " "error, this option determines whether the server ignores the error and " "closes the binary log, or aborts.", GLOBAL_VAR(binlog_error_action), CMD_LINE(REQUIRED_ARG), binlog_error_action_list, DEFAULT(ABORT_SERVER))
 
static Sys_var_bool Sys_trust_function_creators ("log_bin_trust_function_creators", "If set to FALSE (the default), then when --log-bin is used, creation " "of a stored function (or trigger) is allowed only to users having the " "SUPER privilege and only if this stored function (trigger) may not " "break binary logging. Note that if ALL connections to this server " "ALWAYS use row-based binary logging, the security issues do not " "exist and the binary logging cannot break, so you can safely set " "this to TRUE. This variable is deprecated and will be removed in a " "future version.", GLOBAL_VAR(trust_function_creators), CMD_LINE(OPT_ARG), DEFAULT(false), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(nullptr), DEPRECATED_VAR(""))
 
static Sys_var_bool Sys_check_proxy_users ("check_proxy_users", "If set to FALSE (the default), then proxy user identity will not be " "mapped for authentication plugins which support mapping from grant " "tables. When set to TRUE, users associated with authentication " "plugins which signal proxy user mapping should be done according to " "GRANT PROXY privilege definition.", GLOBAL_VAR(check_proxy_users), CMD_LINE(OPT_ARG), DEFAULT(false))
 
static Sys_var_bool Sys_mysql_native_password_proxy_users ("mysql_native_password_proxy_users", "If set to FALSE (the default), then the mysql_native_password " "plugin will not signal for authenticated users to be checked for " "mapping " "to proxy users. When set to TRUE, the plugin will flag associated " "authenticated accounts to be mapped to proxy users when the server " "option " "check_proxy_users is enabled.", GLOBAL_VAR(mysql_native_password_proxy_users), CMD_LINE(OPT_ARG), DEFAULT(false))
 
static Sys_var_bool Sys_sha256_password_proxy_users ("sha256_password_proxy_users", "If set to FALSE (the default), then the sha256_password authentication " "plugin will not signal for authenticated users to be checked for " "mapping " "to proxy users. When set to TRUE, the plugin will flag associated " "authenticated accounts to be mapped to proxy users when the server " "option " "check_proxy_users is enabled.", GLOBAL_VAR(sha256_password_proxy_users), CMD_LINE(OPT_ARG), DEFAULT(false))
 
static Sys_var_charptr Sys_log_error ("log_error", "Error log file", READ_ONLY NON_PERSIST GLOBAL_VAR(log_error_dest), CMD_LINE(OPT_ARG, OPT_LOG_ERROR), IN_FS_CHARSET, DEFAULT(disabled_my_option), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(nullptr), nullptr, sys_var::PARSE_EARLY)
 
static Sys_var_charptr Sys_log_error_services ("log_error_services", "Services that should be called when an error event is received", PERSIST_AS_READONLY GLOBAL_VAR(opt_log_error_services), CMD_LINE(REQUIRED_ARG), IN_SYSTEM_CHARSET, DEFAULT(LOG_ERROR_SERVICES_DEFAULT), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_log_error_services), ON_UPDATE(fix_log_error_services), nullptr, sys_var::PARSE_EARLY)
 
static Sys_var_charptr Sys_log_error_suppression_list ("log_error_suppression_list", "Comma-separated list of error-codes. Error messages corresponding to " "these codes will not be included in the error log. Only events with a " "severity of Warning or Information can be suppressed; events with " "System " "or Error severity will always be included. Requires the filter " "\'log_filter_internal\' to be set in @@global.log_error_services, which " "is the default.", PERSIST_AS_READONLY GLOBAL_VAR(opt_log_error_suppression_list), CMD_LINE(REQUIRED_ARG), IN_SYSTEM_CHARSET, DEFAULT(""), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_log_error_suppression_list), ON_UPDATE(fix_log_error_suppression_list))
 
static Sys_var_bool Sys_log_queries_not_using_indexes ("log_queries_not_using_indexes", "Log queries that are executed without benefit of any index to the " "slow log if it is open", GLOBAL_VAR(opt_log_queries_not_using_indexes), CMD_LINE(OPT_ARG), DEFAULT(false))
 
static Sys_var_bool Sys_log_slow_admin_statements ("log_slow_admin_statements", "Log slow OPTIMIZE, ANALYZE, ALTER and other administrative statements " "to " "the slow log if it is open.", GLOBAL_VAR(opt_log_slow_admin_statements), CMD_LINE(OPT_ARG), DEFAULT(false))
 
static Sys_var_bool Sys_log_slow_replica_statements ("log_slow_replica_statements", "Log slow statements executed by the replication applier threads to the " "slow log if it is open.", GLOBAL_VAR(opt_log_slow_replica_statements), CMD_LINE(OPT_ARG), DEFAULT(false))
 
static Sys_var_deprecated_alias Sys_log_slow_slave_statements ("log_slow_slave_statements", Sys_log_slow_replica_statements)
 
static Sys_var_ulong Sys_log_throttle_queries_not_using_indexes ("log_throttle_queries_not_using_indexes", "Log at most this many 'not using index' warnings per minute to the " "slow log. Any further warnings will be condensed into a single " "summary line. A value of 0 disables throttling. " "Option has no effect unless --log_queries_not_using_indexes is set.", GLOBAL_VAR(opt_log_throttle_queries_not_using_indexes), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, ULONG_MAX), DEFAULT(0), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(update_log_throttle_queries_not_using_indexes))
 
static Sys_var_ulong Sys_log_error_verbosity ("log_error_verbosity", "How detailed the error log should be. " "1, log errors only. " "2, log errors and warnings. " "3, log errors, warnings, and notes. " "Messages sent to the client are unaffected by this setting.", PERSIST_AS_READONLY GLOBAL_VAR(log_error_verbosity), CMD_LINE(REQUIRED_ARG), VALID_RANGE(1, 3), DEFAULT(2), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(update_log_error_verbosity))
 
static Sys_var_enum Sys_log_timestamps ("log_timestamps", "UTC to timestamp log files in zulu time, for more concise timestamps " "and easier correlation of logs from servers from multiple time zones, " "or SYSTEM to use the system's local time. " "This affects only log files, not log tables, as the timestamp columns " "of the latter can be converted at will.", GLOBAL_VAR(opt_log_timestamps), CMD_LINE(REQUIRED_ARG), timestamp_type_names, DEFAULT(0), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(nullptr), nullptr, sys_var::PARSE_EARLY)
 
static Sys_var_bool Sys_log_statements_unsafe_for_binlog ("log_statements_unsafe_for_binlog", "Log statements considered unsafe when using statement based binary " "logging. This variable is deprecated and will be removed in a " "future version.", GLOBAL_VAR(opt_log_unsafe_statements), CMD_LINE(OPT_ARG), DEFAULT(true), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(nullptr), DEPRECATED_VAR(""))
 
static Sys_var_double Sys_long_query_time ("long_query_time", "Log all queries that have taken more than long_query_time seconds " "to execute to file. The argument will be treated as a decimal value " "with microsecond precision", SESSION_VAR(long_query_time_double), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, LONG_TIMEOUT), DEFAULT(10), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(update_cached_long_query_time))
 
static Sys_var_bool Sys_low_priority_updates ("low_priority_updates", "INSERT/DELETE/UPDATE has lower priority than selects", SESSION_VAR(low_priority_updates), CMD_LINE(OPT_ARG), DEFAULT(false), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_session_admin_no_super), ON_UPDATE(fix_low_prio_updates))
 
static Sys_var_bool Sys_lower_case_file_system ("lower_case_file_system", "Case sensitivity of file names on the file system where the " "data directory is located", READ_ONLY NON_PERSIST GLOBAL_VAR(lower_case_file_system), NO_CMD_LINE, DEFAULT(false))
 
static Sys_var_uint Sys_lower_case_table_names ("lower_case_table_names", "If set to 1 table names are stored in lowercase on disk and table " "names will be case-insensitive. Should be set to 2 if you are using " "a case insensitive file system", READ_ONLY GLOBAL_VAR(lower_case_table_names), CMD_LINE(OPT_ARG, OPT_LOWER_CASE_TABLE_NAMES), VALID_RANGE(0, 2), DEFAULT(0), BLOCK_SIZE(1))
 
static Sys_var_ulong Sys_max_allowed_packet ("max_allowed_packet", "Max packet length to send to or receive from the server", SESSION_VAR(max_allowed_packet), CMD_LINE(REQUIRED_ARG), VALID_RANGE(1024, 1024 *1024 *1024), DEFAULT(64 *1024 *1024), BLOCK_SIZE(1024), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_max_allowed_packet))
 
static Sys_var_ulong Sys_replica_max_allowed_packet ("replica_max_allowed_packet", "The maximum size of packets sent from an upstream source server to this " "server.", GLOBAL_VAR(replica_max_allowed_packet), CMD_LINE(REQUIRED_ARG), VALID_RANGE(1024, mysql::binlog::event::max_log_event_size), DEFAULT(mysql::binlog::event::max_log_event_size), BLOCK_SIZE(1024))
 
static Sys_var_deprecated_alias Sys_slave_max_allowed_packet ("slave_max_allowed_packet", Sys_replica_max_allowed_packet)
 
static Sys_var_ulonglong Sys_max_binlog_cache_size ("max_binlog_cache_size", "Sets the total size of the transactional cache", GLOBAL_VAR(max_binlog_cache_size), CMD_LINE(REQUIRED_ARG), VALID_RANGE(IO_SIZE, ULLONG_MAX), DEFAULT((ULLONG_MAX/IO_SIZE) *IO_SIZE), BLOCK_SIZE(IO_SIZE), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(fix_binlog_cache_size))
 
static Sys_var_ulonglong Sys_max_binlog_stmt_cache_size ("max_binlog_stmt_cache_size", "Sets the total size of the statement cache", GLOBAL_VAR(max_binlog_stmt_cache_size), CMD_LINE(REQUIRED_ARG), VALID_RANGE(IO_SIZE, ULLONG_MAX), DEFAULT((ULLONG_MAX/IO_SIZE) *IO_SIZE), BLOCK_SIZE(IO_SIZE), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(fix_binlog_stmt_cache_size))
 
static Sys_var_ulong Sys_max_binlog_size ("max_binlog_size", "Binary log will be rotated automatically when the size exceeds this " "value. Will also apply to relay logs if max_relay_log_size is 0", GLOBAL_VAR(max_binlog_size), CMD_LINE(REQUIRED_ARG), VALID_RANGE(IO_SIZE, 1024 *1024L *1024L), DEFAULT(1024 *1024L *1024L), BLOCK_SIZE(IO_SIZE), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(fix_max_binlog_size))
 
static Sys_var_ulong Sys_max_connections ("max_connections", "The number of simultaneous clients allowed", GLOBAL_VAR(max_connections), CMD_LINE(REQUIRED_ARG), VALID_RANGE(1, 100000), DEFAULT(MAX_CONNECTIONS_DEFAULT), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(nullptr), nullptr, sys_var::PARSE_EARLY)
 
static Sys_var_ulong Sys_max_connect_errors ("max_connect_errors", "If there is more than this number of interrupted connections from " "a host this host will be blocked from further connections", GLOBAL_VAR(max_connect_errors), CMD_LINE(REQUIRED_ARG), VALID_RANGE(1, ULONG_MAX), DEFAULT(100), BLOCK_SIZE(1))
 
static Sys_var_long Sys_max_digest_length ("max_digest_length", "Maximum length considered for digest text.", READ_ONLY GLOBAL_VAR(max_digest_length), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, 1024 *1024), DEFAULT(1024), BLOCK_SIZE(1))
 
static Sys_var_ulong Sys_max_insert_delayed_threads ("max_insert_delayed_threads", "Don't start more than this number of threads to handle INSERT " "DELAYED statements. If set to zero INSERT DELAYED will be not used. " "This variable is deprecated along with INSERT DELAYED.", SESSION_VAR(max_insert_delayed_threads), NO_CMD_LINE, VALID_RANGE(0, 16384), DEFAULT(20), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_max_delayed_threads), ON_UPDATE(nullptr), DEPRECATED_VAR(""))
 
static Sys_var_ulong Sys_max_delayed_threads ("max_delayed_threads", "Don't start more than this number of threads to handle INSERT " "DELAYED statements. If set to zero INSERT DELAYED will be not used. " "This variable is deprecated along with INSERT DELAYED.", SESSION_VAR(max_insert_delayed_threads), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, 16384), DEFAULT(20), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_max_delayed_threads), ON_UPDATE(nullptr), DEPRECATED_VAR(""))
 
static Sys_var_ulong Sys_max_error_count ("max_error_count", "Max number of errors/warnings to store for a statement", HINT_UPDATEABLE SESSION_VAR(max_error_count), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, 65535), DEFAULT(DEFAULT_ERROR_COUNT), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_session_admin_no_super))
 
static Sys_var_ulonglong Sys_max_heap_table_size ("max_heap_table_size", "Don't allow creation of heap tables bigger than this", HINT_UPDATEABLE SESSION_VAR(max_heap_table_size), CMD_LINE(REQUIRED_ARG), VALID_RANGE(16384,(ulonglong) ~(intptr) 0), DEFAULT(16 *1024 *1024), BLOCK_SIZE(1024))
 
static Sys_var_uint Sys_pseudo_thread_id ("pseudo_thread_id", "This variable is for internal server use", SESSION_ONLY(pseudo_thread_id), NO_CMD_LINE, VALID_RANGE(0, UINT_MAX32), DEFAULT(0), BLOCK_SIZE(1), NO_MUTEX_GUARD, IN_BINLOG, ON_CHECK(check_session_admin))
 
static Sys_var_harows Sys_max_join_size ("max_join_size", "Joins that are probably going to read more than max_join_size " "records return an error", HINT_UPDATEABLE SESSION_VAR(max_join_size), CMD_LINE(REQUIRED_ARG), VALID_RANGE(1, HA_POS_ERROR), DEFAULT(HA_POS_ERROR), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(fix_max_join_size))
 
static Sys_var_ulong Sys_max_seeks_for_key ("max_seeks_for_key", "Limit assumed max number of seeks when looking up rows based on a key", HINT_UPDATEABLE SESSION_VAR(max_seeks_for_key), CMD_LINE(REQUIRED_ARG), VALID_RANGE(1, ULONG_MAX), DEFAULT(ULONG_MAX), BLOCK_SIZE(1))
 
static Sys_var_ulong Sys_max_length_for_sort_data ("max_length_for_sort_data", "This variable is deprecated and will be removed in a future release.", HINT_UPDATEABLE SESSION_VAR(max_length_for_sort_data), CMD_LINE(REQUIRED_ARG), VALID_RANGE(4, 8192 *1024L), DEFAULT(4096), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(nullptr), DEPRECATED_VAR(""))
 
static Sys_var_ulong Sys_max_points_in_geometry ("max_points_in_geometry", "Maximum number of points in a geometry", HINT_UPDATEABLE SESSION_VAR(max_points_in_geometry), CMD_LINE(OPT_ARG), VALID_RANGE(3, 1024 *1024L), DEFAULT(64 *1024), BLOCK_SIZE(1))
 
static PolyLock_mutex PLock_prepared_stmt_count & LOCK_prepared_stmt_count
 
static Sys_var_ulong Sys_max_prepared_stmt_count ("max_prepared_stmt_count", "Maximum number of prepared statements in the server", GLOBAL_VAR(max_prepared_stmt_count), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, num_prepared_stmt_limit), DEFAULT(16382), BLOCK_SIZE(1), &PLock_prepared_stmt_count, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(nullptr), nullptr, sys_var::PARSE_EARLY)
 
static Sys_var_ulong Sys_max_relay_log_size ("max_relay_log_size", "If non-zero: relay log will be rotated automatically when the " "size exceeds this value; if zero: when the size " "exceeds max_binlog_size", GLOBAL_VAR(max_relay_log_size), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, 1024L *1024 *1024), DEFAULT(0), BLOCK_SIZE(IO_SIZE), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(fix_max_relay_log_size))
 
static Sys_var_ulong Sys_max_sort_length ("max_sort_length", "The number of bytes to use when sorting long values with PAD SPACE " "collations (only the first max_sort_length bytes of each value are " "used; the rest are ignored)", HINT_UPDATEABLE SESSION_VAR(max_sort_length), CMD_LINE(REQUIRED_ARG), VALID_RANGE(4, 8192 *1024L), DEFAULT(1024), BLOCK_SIZE(1))
 
static Sys_var_ulong Sys_max_sp_recursion_depth ("max_sp_recursion_depth", "Maximum stored procedure recursion depth", SESSION_VAR(max_sp_recursion_depth), CMD_LINE(OPT_ARG), VALID_RANGE(0, 255), DEFAULT(0), BLOCK_SIZE(1))
 
static Sys_var_max_user_conn Sys_max_user_connections ("max_user_connections", "The maximum number of active connections for a single user " "(0 = no limit)", SESSION_VAR(max_user_connections), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, UINT_MAX), DEFAULT(0), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(session_readonly))
 
static Sys_var_ulong Sys_max_write_lock_count ("max_write_lock_count", "After this many write locks, allow some read locks to run in between", GLOBAL_VAR(max_write_lock_count), CMD_LINE(REQUIRED_ARG), VALID_RANGE(1, ULONG_MAX), DEFAULT(ULONG_MAX), BLOCK_SIZE(1))
 
static Sys_var_ulong Sys_min_examined_row_limit ("min_examined_row_limit", "Don't write queries to slow log that examine fewer rows " "than that", SESSION_VAR(min_examined_row_limit), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, ULONG_MAX), DEFAULT(0), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_session_admin_no_super))
 
static Sys_var_ulong Sys_net_buffer_length ("net_buffer_length", "Buffer length for TCP/IP and socket communication", SESSION_VAR(net_buffer_length), CMD_LINE(REQUIRED_ARG), VALID_RANGE(1024, 1024 *1024), DEFAULT(16384), BLOCK_SIZE(1024), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_net_buffer_length))
 
static Sys_var_ulong Sys_net_read_timeout ("net_read_timeout", "Number of seconds to wait for more data from a connection before " "aborting the read", SESSION_VAR(net_read_timeout), CMD_LINE(REQUIRED_ARG), VALID_RANGE(1, LONG_TIMEOUT), DEFAULT(NET_READ_TIMEOUT), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(fix_net_read_timeout))
 
static Sys_var_ulong Sys_net_write_timeout ("net_write_timeout", "Number of seconds to wait for a block to be written to a connection " "before aborting the write", SESSION_VAR(net_write_timeout), CMD_LINE(REQUIRED_ARG), VALID_RANGE(1, LONG_TIMEOUT), DEFAULT(NET_WRITE_TIMEOUT), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(fix_net_write_timeout))
 
static Sys_var_ulong Sys_net_retry_count ("net_retry_count", "If a read on a communication port is interrupted, retry this " "many times before giving up", SESSION_VAR(net_retry_count), CMD_LINE(REQUIRED_ARG), VALID_RANGE(1, ULONG_MAX), DEFAULT(MYSQLD_NET_RETRY_COUNT), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(fix_net_retry_count))
 
static Sys_var_bool Sys_old_alter_table ("old_alter_table", "Use old, non-optimized alter table", SESSION_VAR(old_alter_table), CMD_LINE(OPT_ARG), DEFAULT(false))
 
static Sys_var_ulong Sys_open_files_limit ("open_files_limit", "If this is not 0, then mysqld will use this value to reserve file " "descriptors to use with setrlimit(). If this value is 0 then mysqld " "will reserve max_connections*5 or max_connections + table_open_cache*2 " "(whichever is larger) number of file descriptors", READ_ONLY GLOBAL_VAR(open_files_limit), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, OS_FILE_LIMIT), DEFAULT(0), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(nullptr), nullptr, sys_var::PARSE_EARLY)
 
static Sys_var_ulong Sys_optimizer_prune_level ("optimizer_prune_level", "Controls the heuristic(s) applied during query optimization to prune " "less-promising partial plans from the optimizer search space. " "Meaning: 0 - do not apply any heuristic, thus perform exhaustive " "search; 1 - prune plans based on number of retrieved rows", HINT_UPDATEABLE SESSION_VAR(optimizer_prune_level), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, 1), DEFAULT(1), BLOCK_SIZE(1))
 
static Sys_var_ulong Sys_optimizer_search_depth ("optimizer_search_depth", "Maximum depth of search performed by the query optimizer. Values " "larger than the number of relations in a query result in better " "query plans, but take longer to compile a query. Values smaller " "than the number of tables in a relation result in faster " "optimization, but may produce very bad query plans. If set to 0, " "the system will automatically pick a reasonable value", HINT_UPDATEABLE SESSION_VAR(optimizer_search_depth), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, MAX_TABLES+1), DEFAULT(MAX_TABLES+1), BLOCK_SIZE(1))
 
static Sys_var_ulong Sys_optimizer_max_subgraph_pairs ("optimizer_max_subgraph_pairs", "Maximum depth of subgraph pairs a query can have before the " "hypergraph join optimizer starts reducing the search space " "heuristically. Larger values may result in better query plans " "for large queries, but also more time and memory spent during planning. " "Increasing this larger than the actual number of subgraph pairs " "in the query will have no further effect. " "Ignored by the old (non-hypergraph) join optimizer", HINT_UPDATEABLE SESSION_VAR(optimizer_max_subgraph_pairs), CMD_LINE(REQUIRED_ARG), VALID_RANGE(1, INT_MAX), DEFAULT(100000), BLOCK_SIZE(1))
 
static Sys_var_ulong Sys_range_optimizer_max_mem_size ("range_optimizer_max_mem_size", "Maximum amount of memory used by the range optimizer " "to allocate predicates during range analysis. " "The larger the number, more memory may be consumed during " "range analysis. If the value is too low to completed range " "optimization of a query, index range scan will not be " "considered for this query. A value of 0 means range optimizer " "does not have any cap on memory. ", HINT_UPDATEABLE SESSION_VAR(range_optimizer_max_mem_size), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, ULONG_MAX), DEFAULT(8388608), BLOCK_SIZE(1))
 
constexpr size_t max_mem_sz = std::numeric_limits<size_t>::max()
 
static Sys_var_ulonglong Sys_histogram_generation_max_mem_size ("histogram_generation_max_mem_size", "Maximum amount of memory available for generating histograms", SESSION_VAR(histogram_generation_max_mem_size), CMD_LINE(REQUIRED_ARG), VALID_RANGE(1000000, max_mem_sz), DEFAULT(20000000), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_session_admin), ON_UPDATE(nullptr))
 
static Sys_var_ulonglong Sys_parser_max_mem_size ("parser_max_mem_size", "Maximum amount of memory available to the parser", SESSION_VAR(parser_max_mem_size), CMD_LINE(REQUIRED_ARG), VALID_RANGE(10 *1000 *1000, max_mem_sz), DEFAULT(max_mem_sz), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(limit_parser_max_mem_size), ON_UPDATE(nullptr))
 
static const char * optimizer_switch_names []
 
static Sys_var_flagset Sys_optimizer_switch ("optimizer_switch", "optimizer_switch=option=val[,option=val...], where option is one of " "{index_merge, index_merge_union, index_merge_sort_union, " "index_merge_intersection, engine_condition_pushdown, " "index_condition_pushdown, mrr, mrr_cost_based" ", materialization, semijoin, loosescan, firstmatch, duplicateweedout," " subquery_materialization_cost_based, skip_scan," " block_nested_loop, batched_key_access, use_index_extensions," " condition_fanout_filter, derived_merge, hash_join," " subquery_to_derived, prefer_ordering_index," " derived_condition_pushdown, hash_set_operations} and val is one of " "{on, off, default}", HINT_UPDATEABLE SESSION_VAR(optimizer_switch), CMD_LINE(REQUIRED_ARG), optimizer_switch_names, DEFAULT(OPTIMIZER_SWITCH_DEFAULT), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_optimizer_switch), ON_UPDATE(nullptr))
 
static PolyLock_mutex PLock_global_conn_mem_limit & LOCK_global_conn_mem_limit
 
static Sys_var_ulonglong Sys_global_connection_memory_limit ("global_connection_memory_limit", "Maximum amount of memory all connections can consume", GLOBAL_VAR(global_conn_mem_limit), CMD_LINE(REQUIRED_ARG), VALID_RANGE(1, max_mem_sz), DEFAULT(max_mem_sz), BLOCK_SIZE(1), &PLock_global_conn_mem_limit, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(nullptr))
 
static Sys_var_ulonglong Sys_connection_memory_limit ("connection_memory_limit", "Maximum amount of memory connection can consume", SESSION_VAR(conn_mem_limit), CMD_LINE(REQUIRED_ARG), VALID_RANGE(1, max_mem_sz), DEFAULT(max_mem_sz), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_session_admin), ON_UPDATE(nullptr))
 
static Sys_var_ulong Sys_connection_memory_chunk_size ("connection_memory_chunk_size", "Chunk size regulating frequency of updating the global memory counter", SESSION_VAR(conn_mem_chunk_size), CMD_LINE(REQUIRED_ARG), VALID_RANGE(1, 1024 *1024 *512), DEFAULT(8192), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_session_admin), ON_UPDATE(nullptr))
 
static Sys_var_bool Sys_connection_global_memory_tracking ("global_connection_memory_tracking", "Enable updating the global memory counter and checking " "the global connection memory limit exceeding", SESSION_VAR(conn_global_mem_tracking), CMD_LINE(OPT_ARG), DEFAULT(false), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_session_admin), ON_UPDATE(nullptr))
 
static Sys_var_bool Sys_var_end_markers_in_json ("end_markers_in_json", "In JSON output (\"EXPLAIN FORMAT=JSON\" and optimizer trace), " "if variable is set to 1, repeats the structure's key (if it has one) " "near the closing bracket", HINT_UPDATEABLE SESSION_VAR(end_markers_in_json), CMD_LINE(OPT_ARG), DEFAULT(false))
 
static Sys_var_flagset Sys_optimizer_trace ("optimizer_trace", "Controls tracing of the Optimizer:" " optimizer_trace=option=val[,option=val...], where option is one of" " {enabled, one_line}" " and val is one of {on, default}", SESSION_VAR(optimizer_trace), CMD_LINE(REQUIRED_ARG), Opt_trace_context::flag_names, DEFAULT(Opt_trace_context::FLAG_DEFAULT))
 
export sys_varSys_optimizer_trace_ptr = &Sys_optimizer_trace
 
static Sys_var_flagset Sys_optimizer_trace_features ("optimizer_trace_features", "Enables/disables tracing of selected features of the Optimizer:" " optimizer_trace_features=option=val[,option=val...], where option is " "one " "of" " {greedy_search, range_optimizer, dynamic_range, repeated_subselect}" " and val is one of {on, off, default}", SESSION_VAR(optimizer_trace_features), CMD_LINE(REQUIRED_ARG), Opt_trace_context::feature_names, DEFAULT(Opt_trace_context::default_features))
 Note how "misc" is not here: it is not accessible to the user; disabling "misc" would disable the top object, which would make an empty trace. More...
 
static Sys_var_long Sys_optimizer_trace_offset ("optimizer_trace_offset", "Offset of first optimizer trace to show; see manual", SESSION_VAR(optimizer_trace_offset), CMD_LINE(REQUIRED_ARG), VALID_RANGE(LONG_MIN, LONG_MAX), DEFAULT(-1), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(optimizer_trace_update))
 
static Sys_var_long Sys_optimizer_trace_limit ("optimizer_trace_limit", "Maximum number of shown optimizer traces", SESSION_VAR(optimizer_trace_limit), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, LONG_MAX), DEFAULT(1), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(optimizer_trace_update))
 
static Sys_var_ulong Sys_optimizer_trace_max_mem_size ("optimizer_trace_max_mem_size", "Maximum allowed cumulated size of stored optimizer traces", SESSION_VAR(optimizer_trace_max_mem_size), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, ULONG_MAX), DEFAULT(1024 *1024), BLOCK_SIZE(1))
 
static Sys_var_charptr Sys_pid_file ("pid_file", "Pid file used by safe_mysqld", READ_ONLY NON_PERSIST GLOBAL_VAR(pidfile_name_ptr), CMD_LINE(REQUIRED_ARG), IN_FS_CHARSET, DEFAULT(pidfile_name))
 
static Sys_var_charptr Sys_plugin_dir ("plugin_dir", "Directory for plugins", READ_ONLY NON_PERSIST GLOBAL_VAR(opt_plugin_dir_ptr), CMD_LINE(REQUIRED_ARG), IN_FS_CHARSET, DEFAULT(nullptr))
 
static Sys_var_uint Sys_port ("port", "Port number to use for connection or 0 to default to, " "my.cnf, $MYSQL_TCP_PORT, " "/etc/services, " "built-in default (" STRINGIFY_ARG(MYSQL_PORT) "), whatever comes first", READ_ONLY NON_PERSIST GLOBAL_VAR(mysqld_port), CMD_LINE(REQUIRED_ARG, 'P'), VALID_RANGE(0, 65535), DEFAULT(0), BLOCK_SIZE(1))
 
static Sys_var_ulong Sys_preload_buff_size ("preload_buffer_size", "The size of the buffer that is allocated when preloading indexes", SESSION_VAR(preload_buff_size), CMD_LINE(REQUIRED_ARG), VALID_RANGE(1024, 1024 *1024 *1024), DEFAULT(32768), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_session_admin_no_super))
 
static Sys_var_uint Sys_protocol_version ("protocol_version", "The version of the client/server protocol used by the MySQL server", READ_ONLY NON_PERSIST GLOBAL_VAR(protocol_version), NO_CMD_LINE, VALID_RANGE(0, ~0), DEFAULT(PROTOCOL_VERSION), BLOCK_SIZE(1))
 
static Sys_var_proxy_user Sys_proxy_user ("proxy_user", "The proxy user account name used when logging in", IN_SYSTEM_CHARSET)
 
static Sys_var_external_user Sys_external_user ("external_user", "The external user account used when logging in", IN_SYSTEM_CHARSET)
 
static Sys_var_ulong Sys_read_buff_size ("read_buffer_size", "Each thread that does a sequential scan allocates a buffer of " "this size for each table it scans. If you do many sequential scans, " "you may want to increase this value", HINT_UPDATEABLE SESSION_VAR(read_buff_size), CMD_LINE(REQUIRED_ARG), VALID_RANGE(IO_SIZE *2, INT_MAX32), DEFAULT(128 *1024), BLOCK_SIZE(IO_SIZE))
 
static Sys_var_bool Sys_require_secure_transport ("require_secure_transport", "When this option is enabled, connections attempted using insecure " "transport will be rejected. Secure transports are SSL/TLS, " "Unix socket or Shared Memory (on Windows).", GLOBAL_VAR(opt_require_secure_transport), CMD_LINE(OPT_ARG), DEFAULT(false), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_require_secure_transport), ON_UPDATE(nullptr))
 
static Sys_var_bool Sys_readonly ("read_only", "Make all non-temporary tables read-only, with the exception for " "replication applier threads and users with the SUPER privilege.", GLOBAL_VAR(read_only), CMD_LINE(OPT_ARG), DEFAULT(false), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_read_only), ON_UPDATE(fix_read_only))
 The read_only boolean is always equal to the opt_readonly boolean except during fix_read_only(); when that function is entered, opt_readonly is the pre-update value and read_only is the post-update value. More...
 
static Sys_var_bool Sys_super_readonly ("super_read_only", "Make all non-temporary tables read-only, with the exception for " "replication applier threads. Users with the SUPER privilege are " "affected, unlike read_only. Setting super_read_only to ON " "also sets read_only to ON.", GLOBAL_VAR(super_read_only), CMD_LINE(OPT_ARG), DEFAULT(false), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(fix_super_read_only))
 Setting super_read_only to ON triggers read_only to also be set to ON. More...
 
static Sys_var_ulong Sys_read_rnd_buff_size ("read_rnd_buffer_size", "When reading rows in sorted order after a sort, the rows are read " "through this buffer to avoid a disk seeks", HINT_UPDATEABLE SESSION_VAR(read_rnd_buff_size), CMD_LINE(REQUIRED_ARG), VALID_RANGE(1, INT_MAX32), DEFAULT(256 *1024), BLOCK_SIZE(1))
 
static Sys_var_ulong Sys_div_precincrement ("div_precision_increment", "Precision of the result of '/' " "operator will be increased on that value", HINT_UPDATEABLE SESSION_VAR(div_precincrement), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, DECIMAL_MAX_SCALE), DEFAULT(4), BLOCK_SIZE(1))
 
static Sys_var_uint Sys_eq_range_index_dive_limit ("eq_range_index_dive_limit", "The optimizer will use existing index statistics instead of " "doing index dives for equality ranges if the number of equality " "ranges for the index is larger than or equal to this number. " "If set to 0, index dives are always used.", HINT_UPDATEABLE SESSION_VAR(eq_range_index_dive_limit), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, UINT_MAX32), DEFAULT(200), BLOCK_SIZE(1))
 
static Sys_var_ulong Sys_range_alloc_block_size ("range_alloc_block_size", "Allocation block size for storing ranges during optimization", HINT_UPDATEABLE SESSION_VAR(range_alloc_block_size), CMD_LINE(REQUIRED_ARG), VALID_RANGE(RANGE_ALLOC_BLOCK_SIZE, UINT32_MAX), DEFAULT(RANGE_ALLOC_BLOCK_SIZE), BLOCK_SIZE(1024))
 
static Sys_var_ulong Sys_query_alloc_block_size ("query_alloc_block_size", "Allocation block size for query parsing and execution", SESSION_VAR(query_alloc_block_size), CMD_LINE(REQUIRED_ARG), VALID_RANGE(1024, UINT_MAX32), DEFAULT(QUERY_ALLOC_BLOCK_SIZE), BLOCK_SIZE(1024), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(fix_thd_mem_root))
 
static Sys_var_ulong Sys_query_prealloc_size ("query_prealloc_size", "Persistent buffer for query parsing and execution", SESSION_VAR(query_prealloc_size), CMD_LINE(REQUIRED_ARG), VALID_RANGE(QUERY_ALLOC_PREALLOC_SIZE, ULONG_MAX), DEFAULT(QUERY_ALLOC_PREALLOC_SIZE), BLOCK_SIZE(1024), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(nullptr), DEPRECATED_VAR(""))
 
static Sys_var_bool Sys_skip_external_locking ("skip_external_locking", "Don't use system (external) locking", READ_ONLY NON_PERSIST GLOBAL_VAR(my_disable_locking), NO_CMD_LINE, DEFAULT(true))
 
static Sys_var_bool Sys_skip_networking ("skip_networking", "Don't allow connection with TCP/IP", READ_ONLY NON_PERSIST GLOBAL_VAR(opt_disable_networking), CMD_LINE(OPT_ARG), DEFAULT(false))
 
static Sys_var_bool Sys_skip_name_resolve ("skip_name_resolve", "Don't resolve hostnames. All hostnames are IP's or 'localhost'.", READ_ONLY GLOBAL_VAR(opt_skip_name_resolve), CMD_LINE(OPT_ARG, OPT_SKIP_RESOLVE), DEFAULT(false))
 
static Sys_var_bool Sys_skip_show_database ("skip_show_database", "Don't allow 'SHOW DATABASE' commands", READ_ONLY GLOBAL_VAR(opt_skip_show_db), CMD_LINE(OPT_ARG), DEFAULT(false))
 
static Sys_var_charptr Sys_socket ("socket", "Socket file to use for connection", READ_ONLY NON_PERSIST GLOBAL_VAR(mysqld_unix_port), CMD_LINE(REQUIRED_ARG), IN_FS_CHARSET, DEFAULT(nullptr))
 
static Sys_var_ulong Sys_thread_stack ("thread_stack", "The stack size for each thread", READ_ONLY GLOBAL_VAR(my_thread_stack_size), CMD_LINE(REQUIRED_ARG), VALID_RANGE(128 *1024, ULONG_MAX), DEFAULT(DEFAULT_THREAD_STACK), BLOCK_SIZE(1024))
 
static Sys_var_charptr Sys_tmpdir ("tmpdir", "Path for temporary files. Several paths may " "be specified, separated by a " "colon (:)" ", in this case they are used in a round-robin fashion", READ_ONLY NON_PERSIST GLOBAL_VAR(opt_mysql_tmpdir), CMD_LINE(REQUIRED_ARG, 't'), IN_FS_CHARSET, DEFAULT(nullptr))
 
static Sys_var_ulong Sys_trans_alloc_block_size ("transaction_alloc_block_size", "Allocation block size for transactions to be stored in binary log", SESSION_VAR(trans_alloc_block_size), CMD_LINE(REQUIRED_ARG), VALID_RANGE(1024, 128 *1024), DEFAULT(QUERY_ALLOC_BLOCK_SIZE), BLOCK_SIZE(1024), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(fix_trans_mem_root))
 
static Sys_var_ulong Sys_trans_prealloc_size ("transaction_prealloc_size", "Persistent buffer for transactions to be stored in binary log", SESSION_VAR(trans_prealloc_size), CMD_LINE(REQUIRED_ARG), VALID_RANGE(1024, 128 *1024), DEFAULT(TRANS_ALLOC_PREALLOC_SIZE), BLOCK_SIZE(1024), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(nullptr), DEPRECATED_VAR(""))
 
static const char * thread_handling_names []
 
static Sys_var_enum Sys_thread_handling ("thread_handling", "Define threads usage for handling queries, one of " "one-thread-per-connection, no-threads, loaded-dynamically", READ_ONLY GLOBAL_VAR(Connection_handler_manager::thread_handling), CMD_LINE(REQUIRED_ARG), thread_handling_names, DEFAULT(0))
 
static Sys_var_charptr Sys_secure_file_priv ("secure_file_priv", "Limit LOAD DATA, SELECT ... OUTFILE, and LOAD_FILE() to files " "within specified directory", READ_ONLY NON_PERSIST GLOBAL_VAR(opt_secure_file_priv), CMD_LINE(REQUIRED_ARG), IN_FS_CHARSET, DEFAULT(DEFAULT_SECURE_FILE_PRIV_DIR))
 
static Sys_var_ulong Sys_server_id ("server_id", "Uniquely identifies the server instance in the community of " "replication partners", PERSIST_AS_READONLY GLOBAL_VAR(server_id), CMD_LINE(REQUIRED_ARG, OPT_SERVER_ID), VALID_RANGE(0, UINT_MAX32), DEFAULT(1), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(fix_server_id))
 
static Sys_var_charptr Sys_server_uuid ("server_uuid", "Uniquely identifies the server instance in the universe", READ_ONLY NON_PERSIST GLOBAL_VAR(server_uuid_ptr), NO_CMD_LINE, IN_FS_CHARSET, DEFAULT(server_uuid))
 
static Sys_var_charptr Sys_server_build_id ("build_id", "A unique Build ID generated by the linker, a 160 bit sha1 signature.", READ_ONLY NON_PERSIST GLOBAL_VAR(server_build_id_ptr), NO_CMD_LINE, IN_FS_CHARSET, DEFAULT(server_build_id))
 
static Sys_var_uint Sys_server_id_bits ("server_id_bits", "Set number of significant bits in server-id", GLOBAL_VAR(opt_server_id_bits), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, 32), DEFAULT(32), BLOCK_SIZE(1))
 
static Sys_var_int32 Sys_regexp_time_limit ("regexp_time_limit", "Timeout for regular expressions matches, in steps of the match " "engine, typically on the order of milliseconds.", GLOBAL_VAR(opt_regexp_time_limit), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, INT32_MAX), DEFAULT(32), BLOCK_SIZE(1))
 
static Sys_var_int32 Sys_regexp_stack_limit ("regexp_stack_limit", "Stack size limit for regular expressions matches", GLOBAL_VAR(opt_regexp_stack_limit), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, INT32_MAX), DEFAULT(8000000), BLOCK_SIZE(1))
 
static Sys_var_bool Sys_replica_compressed_protocol ("replica_compressed_protocol", "Use compression in the source/replica protocol.", GLOBAL_VAR(opt_replica_compressed_protocol), CMD_LINE(OPT_ARG), DEFAULT(false))
 
static Sys_var_deprecated_alias Sys_slave_compressed_protocol ("slave_compressed_protocol", Sys_replica_compressed_protocol)
 
static const char * replica_exec_mode_names []
 
static Sys_var_enum Sys_replica_exec_mode ("replica_exec_mode", "Modes for how replication events should be executed. Legal values " "are STRICT (default) and IDEMPOTENT. In IDEMPOTENT mode, " "replication will ignore duplicate key errors and key not found errors. " "In STRICT mode, replication will stop at those errors.", GLOBAL_VAR(replica_exec_mode_options), CMD_LINE(REQUIRED_ARG), replica_exec_mode_names, DEFAULT(RBR_EXEC_MODE_STRICT))
 
static Sys_var_deprecated_alias Sys_slave_exec_mode ("slave_exec_mode", Sys_replica_exec_mode)
 
const char * replica_type_conversions_name []
 
static Sys_var_set Sys_replica_type_conversions ("replica_type_conversions", "Set of type conversions that may be used by the replication applier " "thread for row events. Allowed values are:" " ALL_LOSSY to enable lossy conversions," " ALL_NON_LOSSY to enable non-lossy conversions," " ALL_UNSIGNED to treat all integer column type data to be unsigned " "values, and" " ALL_SIGNED to treat all integer column type data to be signed values." " Default treatment is ALL_SIGNED. If ALL_SIGNED and ALL_UNSIGNED both " "are" " specified, ALL_SIGNED will take higher priority than ALL_UNSIGNED." " If the variable is assigned the empty set, no conversions are" " allowed and it is expected that the types match exactly.", GLOBAL_VAR(replica_type_conversions_options), CMD_LINE(REQUIRED_ARG), replica_type_conversions_name, DEFAULT(0))
 
static Sys_var_deprecated_alias Sys_slave_type_conversions ("slave_type_conversions", Sys_replica_type_conversions)
 
static Sys_var_bool Sys_replica_sql_verify_checksum ("replica_sql_verify_checksum", "Force checksum verification of replication events after reading them " "from relay log. Note: The replica always verifies checksums for events " "received from the network, if the event has a checksum at all, before " "it writes the event to the relay log. Enabled by default.", GLOBAL_VAR(opt_replica_sql_verify_checksum), CMD_LINE(OPT_ARG), DEFAULT(true))
 
static Sys_var_deprecated_alias Sys_slave_sql_verify_checksum ("slave_sql_verify_checksum", Sys_replica_sql_verify_checksum)
 
static const char * mts_parallel_type_names []
 
static Sys_var_enum Sys_replica_parallel_type ("replica_parallel_type", "The method used by the replication applier to parallelize " "transactions. DATABASE, indicates that it " "may apply transactions in parallel in case they update different " "databases. LOGICAL_CLOCK, which is the default, indicates that it decides " "whether two " "transactions can be applied in parallel using the logical timestamps " "computed by the source.", PERSIST_AS_READONLY GLOBAL_VAR(mts_parallel_option), CMD_LINE(REQUIRED_ARG, OPT_REPLICA_PARALLEL_TYPE), mts_parallel_type_names, DEFAULT(MTS_PARALLEL_TYPE_LOGICAL_CLOCK), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_slave_stopped), ON_UPDATE(nullptr), DEPRECATED_VAR(""))
 
static Sys_var_deprecated_alias Sys_slave_parallel_type ("slave_parallel_type", Sys_replica_parallel_type)
 
static PolyLock_mutex PLock_slave_trans_dep_trackerLOCK_replica_trans_dep_tracker
 
static Sys_var_ulong Binlog_transaction_dependency_history_size ("binlog_transaction_dependency_history_size", "Maximum number of rows to keep in the writeset history.", ->m_opt_max_history_size)
 
static Sys_var_ulong CMD_LINE (REQUIRED_ARG, 0)
 
static Sys_var_ulong VALID_RANGE (1, 1000000)
 
static Sys_var_ulong DEFAULT (25000)
 
static Sys_var_ulong BLOCK_SIZE (1)
 
static Sys_var_ulongPLock_slave_trans_dep_tracker
 
static Sys_var_ulong NOT_IN_BINLOG
 
static Sys_var_ulong ON_CHECK (nullptr)
 
static Sys_var_ulong ON_UPDATE (nullptr))
 
static Sys_var_bool Sys_replica_preserve_commit_order ("replica_preserve_commit_order", "Force replication worker threads to commit in the same order as on the " "source. Enabled by default", PERSIST_AS_READONLY GLOBAL_VAR(opt_replica_preserve_commit_order), CMD_LINE(OPT_ARG, OPT_REPLICA_PRESERVE_COMMIT_ORDER), DEFAULT(true), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_slave_stopped), ON_UPDATE(nullptr))
 
static Sys_var_deprecated_alias Sys_slave_preserve_commit_order ("slave_preserve_commit_order", Sys_replica_preserve_commit_order)
 
static Sys_var_enum_binlog_checksum Binlog_checksum_enum ("binlog_checksum", "Type of BINLOG_CHECKSUM_ALG. Include checksum for " "log events in the binary log. Possible values are NONE and CRC32; " "default is CRC32.", GLOBAL_VAR(binlog_checksum_options), CMD_LINE(REQUIRED_ARG), binlog_checksum_type_names, DEFAULT(mysql::binlog::event::BINLOG_CHECKSUM_ALG_CRC32), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_outside_trx))
 
static Sys_var_bool Sys_source_verify_checksum ("source_verify_checksum", "Force checksum verification of events in binary log before " "sending them to replicas or printing them in output of SHOW BINLOG " "EVENTS. " "Disabled by default.", GLOBAL_VAR(opt_source_verify_checksum), CMD_LINE(OPT_ARG), DEFAULT(false))
 
static Sys_var_deprecated_alias Sys_master_verify_checksum ("master_verify_checksum", Sys_source_verify_checksum)
 
static Sys_var_ulong Sys_slow_launch_time ("slow_launch_time", "If creating the thread takes longer than this value (in seconds), " "the Slow_launch_threads counter will be incremented", GLOBAL_VAR(slow_launch_time), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, LONG_TIMEOUT), DEFAULT(2), BLOCK_SIZE(1))
 
static Sys_var_ulong Sys_sort_buffer ("sort_buffer_size", "Each thread that needs to do a sort allocates a buffer of this size", HINT_UPDATEABLE SESSION_VAR(sortbuff_size), CMD_LINE(REQUIRED_ARG), VALID_RANGE(MIN_SORT_MEMORY, ULONG_MAX), DEFAULT(DEFAULT_SORT_MEMORY), BLOCK_SIZE(1))
 
static const char * sql_mode_names []
 
static Sys_var_set Sys_sql_mode ("sql_mode", "Syntax: sql-mode=mode[,mode[,mode...]]. See the manual for the " "complete list of valid sql modes", HINT_UPDATEABLE SESSION_VAR(sql_mode), CMD_LINE(REQUIRED_ARG), sql_mode_names, DEFAULT(MODE_NO_ENGINE_SUBSTITUTION|MODE_ONLY_FULL_GROUP_BY|MODE_STRICT_TRANS_TABLES|MODE_NO_ZERO_IN_DATE|MODE_NO_ZERO_DATE|MODE_ERROR_FOR_DIVISION_BY_ZERO), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_sql_mode), ON_UPDATE(fix_sql_mode))
 
static Sys_var_ulong Sys_max_execution_time ("max_execution_time", "Kill SELECT statement that takes over the specified number of " "milliseconds", HINT_UPDATEABLE SESSION_VAR(max_execution_time), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, ULONG_MAX), DEFAULT(0), BLOCK_SIZE(1))
 
static const char * ssl_fips_mode_names [] = {"OFF", "ON", "STRICT", nullptr}
 
static Sys_var_enum Sys_ssl_fips_mode ("ssl_fips_mode", "SSL FIPS mode (applies only for OpenSSL); " "permitted values are: OFF, ON, STRICT", READ_ONLY GLOBAL_VAR(opt_ssl_fips_mode), CMD_LINE(REQUIRED_ARG), ssl_fips_mode_names, DEFAULT(0), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(nullptr), DEPRECATED_VAR(""), sys_var::PARSE_EARLY)
 
static Sys_var_bool Sys_auto_generate_certs ("auto_generate_certs", "Auto generate SSL certificates at server startup if " "none of the other SSL system variables are specified and " "certificate/key files are not present in data directory.", READ_ONLY NON_PERSIST GLOBAL_VAR(opt_auto_generate_certs), CMD_LINE(OPT_ARG), DEFAULT(true), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(nullptr), nullptr)
 
static const char * updatable_views_with_limit_names [] = {"NO", "YES", nullptr}
 
static Sys_var_enum Sys_updatable_views_with_limit ("updatable_views_with_limit", "YES = Don't issue an error message (warning only) if a VIEW without " "presence of a key of the underlying table is used in queries with a " "LIMIT clause for updating. NO = Prohibit update of a VIEW, which " "does not contain a key of the underlying table and the query uses " "a LIMIT clause (usually get from GUI tools)", HINT_UPDATEABLE SESSION_VAR(updatable_views_with_limit), CMD_LINE(REQUIRED_ARG), updatable_views_with_limit_names, DEFAULT(true))
 
static Sys_var_system_time_zone Sys_system_time_zone ("system_time_zone", "The server system time zone")
 
static Sys_var_ulong Sys_table_def_size ("table_definition_cache", "The number of cached table definitions", GLOBAL_VAR(table_def_size), CMD_LINE(REQUIRED_ARG, OPT_TABLE_DEFINITION_CACHE), VALID_RANGE(TABLE_DEF_CACHE_MIN, 512 *1024), DEFAULT(TABLE_DEF_CACHE_DEFAULT), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(nullptr), nullptr, sys_var::PARSE_EARLY)
 
static Sys_var_ulong Sys_schema_def_size ("schema_definition_cache", "The number of cached schema definitions", GLOBAL_VAR(schema_def_size), CMD_LINE(REQUIRED_ARG), VALID_RANGE(SCHEMA_DEF_CACHE_MIN, 512 *1024), DEFAULT(SCHEMA_DEF_CACHE_DEFAULT), BLOCK_SIZE(1))
 
static Sys_var_ulong Sys_tablespace_def_size ("tablespace_definition_cache", "The number of cached tablespace definitions", GLOBAL_VAR(tablespace_def_size), CMD_LINE(REQUIRED_ARG), VALID_RANGE(TABLESPACE_DEF_CACHE_MIN, 512 *1024), DEFAULT(TABLESPACE_DEF_CACHE_DEFAULT), BLOCK_SIZE(1))
 
static Sys_var_ulong Sys_stored_program_def_size ("stored_program_definition_cache", "The number of cached stored program definitions", GLOBAL_VAR(stored_program_def_size), CMD_LINE(REQUIRED_ARG), VALID_RANGE(STORED_PROGRAM_DEF_CACHE_MIN, 512 *1024), DEFAULT(STORED_PROGRAM_DEF_CACHE_DEFAULT), BLOCK_SIZE(1))
 
static Sys_var_ulong Sys_table_cache_size ("table_open_cache", "The number of cached open tables " "(total for all table cache instances)", GLOBAL_VAR(table_cache_size), CMD_LINE(REQUIRED_ARG), VALID_RANGE(1, 512 *1024), DEFAULT(TABLE_OPEN_CACHE_DEFAULT), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(fix_table_cache_size), nullptr, sys_var::PARSE_EARLY)
 
static Sys_var_ulong Sys_table_cache_instances ("table_open_cache_instances", "The number of table cache instances", READ_ONLY GLOBAL_VAR(table_cache_instances), CMD_LINE(REQUIRED_ARG), VALID_RANGE(1, Table_cache_manager::MAX_TABLE_CACHES), DEFAULT(Table_cache_manager::DEFAULT_MAX_TABLE_CACHES), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(nullptr), nullptr, sys_var::PARSE_EARLY)
 
static Sys_var_ulong Sys_thread_cache_size ("thread_cache_size", "How many threads we should keep in a cache for reuse", GLOBAL_VAR(Per_thread_connection_handler::max_blocked_pthreads), CMD_LINE(REQUIRED_ARG, OPT_THREAD_CACHE_SIZE), VALID_RANGE(0, 16384), DEFAULT(0), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, nullptr, ON_UPDATE(modify_thread_cache_size))
 
static Sys_var_transaction_isolation Sys_transaction_isolation ("transaction_isolation", "Default transaction isolation level", UNTRACKED_DEFAULT SESSION_VAR(transaction_isolation), NO_CMD_LINE, tx_isolation_names, DEFAULT(ISO_REPEATABLE_READ), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_transaction_isolation))
 
static Sys_var_transaction_read_only Sys_transaction_read_only ("transaction_read_only", "Set default transaction access mode to read only.", UNTRACKED_DEFAULT SESSION_VAR(transaction_read_only), NO_CMD_LINE, DEFAULT(0), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_transaction_read_only))
 
static Sys_var_ulonglong Sys_tmp_table_size ("tmp_table_size", "If an internal in-memory temporary table in the MEMORY or TempTable " "storage engine exceeds this size, MySQL will automatically convert it " "to an on-disk table ", HINT_UPDATEABLE SESSION_VAR(tmp_table_size), CMD_LINE(REQUIRED_ARG), VALID_RANGE(1024, std::numeric_limits< ulonglong >::max()), DEFAULT(16 *1024 *1024), BLOCK_SIZE(1))
 
static char * server_version_ptr
 
static Sys_var_version Sys_version ("version", "Server version", READ_ONLY NON_PERSIST GLOBAL_VAR(server_version_ptr), NO_CMD_LINE, IN_SYSTEM_CHARSET, DEFAULT(server_version))
 
static char * server_version_comment_ptr
 
static Sys_var_charptr Sys_version_comment ("version_comment", "version_comment", READ_ONLY NON_PERSIST GLOBAL_VAR(server_version_comment_ptr), NO_CMD_LINE, IN_SYSTEM_CHARSET, DEFAULT(MYSQL_COMPILATION_COMMENT_SERVER))
 
static char * server_version_compile_machine_ptr
 
static Sys_var_charptr Sys_version_compile_machine ("version_compile_machine", "version_compile_machine", READ_ONLY NON_PERSIST GLOBAL_VAR(server_version_compile_machine_ptr), NO_CMD_LINE, IN_SYSTEM_CHARSET, DEFAULT(MACHINE_TYPE))
 
static char * server_version_compile_os_ptr
 
static Sys_var_charptr Sys_version_compile_os ("version_compile_os", "version_compile_os", READ_ONLY NON_PERSIST GLOBAL_VAR(server_version_compile_os_ptr), NO_CMD_LINE, IN_SYSTEM_CHARSET, DEFAULT(SYSTEM_TYPE))
 
static const char * server_version_compile_zlib_ptr = ZLIB_VERSION
 
static Sys_var_charptr Sys_version_compile_zlib ("version_compile_zlib", "version_compile_zlib", READ_ONLY NON_PERSIST GLOBAL_VAR(server_version_compile_zlib_ptr), NO_CMD_LINE, IN_SYSTEM_CHARSET, DEFAULT(ZLIB_VERSION))
 
static Sys_var_ulong Sys_net_wait_timeout ("wait_timeout", "The number of seconds the server waits for activity on a " "connection before closing it", SESSION_VAR(net_wait_timeout), CMD_LINE(REQUIRED_ARG), VALID_RANGE(1, IF_WIN(INT_MAX32/1000, LONG_TIMEOUT)), DEFAULT(NET_WAIT_TIMEOUT), BLOCK_SIZE(1))
 
static Sys_var_plugin Sys_default_storage_engine ("default_storage_engine", "The default storage engine for new tables", SESSION_VAR(table_plugin), NO_CMD_LINE, MYSQL_STORAGE_ENGINE_PLUGIN, DEFAULT(&default_storage_engine), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_storage_engine))
 
const char * internal_tmp_mem_storage_engine_names []
 
static Sys_var_enum Sys_internal_tmp_mem_storage_engine ("internal_tmp_mem_storage_engine", "The default storage engine for in-memory internal temporary tables.", HINT_UPDATEABLE SESSION_VAR(internal_tmp_mem_storage_engine), CMD_LINE(REQUIRED_ARG), internal_tmp_mem_storage_engine_names, DEFAULT(TMP_TABLE_TEMPTABLE), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_session_admin_no_super))
 
static Sys_var_ulonglong Sys_temptable_max_ram ("temptable_max_ram", "Maximum amount of memory (in bytes) the TempTable storage engine is " "allowed to allocate from the main memory (RAM) before starting to " "store data on disk.", GLOBAL_VAR(temptable_max_ram), CMD_LINE(REQUIRED_ARG), VALID_RANGE(2<< 20, ULLONG_MAX), DEFAULT(std::clamp(ulonglong{3 *(my_physical_memory()/100)}, 1ULL<< 30, 1ULL<< 32)), BLOCK_SIZE(1))
 
static Sys_var_ulonglong Sys_temptable_max_mmap ("temptable_max_mmap", "Maximum amount of memory (in bytes) the TempTable storage engine is " "allowed to allocate from MMAP-backed files before starting to " "store data on disk.", GLOBAL_VAR(temptable_max_mmap), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, ULLONG_MAX), DEFAULT(0), BLOCK_SIZE(1))
 
static Sys_var_bool Sys_temptable_use_mmap ("temptable_use_mmap", "Use mmap files for temptables. " "This variable is deprecated and will be removed in a future release.", GLOBAL_VAR(temptable_use_mmap), CMD_LINE(OPT_ARG), DEFAULT(false), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(update_deprecated_with_removal_message), nullptr, sys_var::PARSE_NORMAL)
 
static Sys_var_plugin Sys_default_tmp_storage_engine ("default_tmp_storage_engine", "The default storage engine for new explicit temporary tables", HINT_UPDATEABLE SESSION_VAR(temp_table_plugin), NO_CMD_LINE, MYSQL_STORAGE_ENGINE_PLUGIN, DEFAULT(&default_tmp_storage_engine), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_storage_engine))
 
static Sys_var_bit Sys_autocommit ("autocommit", "autocommit", SESSION_VAR(option_bits), NO_CMD_LINE, OPTION_AUTOCOMMIT, DEFAULT(true), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), PRE_UPDATE(pre_autocommit), ON_UPDATE(fix_autocommit))
 
export sys_varSys_autocommit_ptr = &Sys_autocommit
 
static Sys_var_bool Sys_big_tables ("big_tables", "Allow big result sets by saving all " "temporary sets on file (Solves most 'table full' errors)", HINT_UPDATEABLE SESSION_VAR(big_tables), CMD_LINE(OPT_ARG), DEFAULT(false))
 
static Sys_var_bit Sys_big_selects ("sql_big_selects", "sql_big_selects", HINT_UPDATEABLE SESSION_VAR(option_bits), NO_CMD_LINE, OPTION_BIG_SELECTS, DEFAULT(false))
 
static Sys_var_bit Sys_log_off ("sql_log_off", "sql_log_off", SESSION_VAR(option_bits), NO_CMD_LINE, OPTION_LOG_OFF, DEFAULT(false), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_session_admin))
 
static Sys_var_bool Sys_log_binlog ("sql_log_bin", "Controls whether logging to the binary log is done", SESSION_ONLY(sql_log_bin), NO_CMD_LINE, DEFAULT(true), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_sql_log_bin), ON_UPDATE(fix_sql_log_bin_after_update))
 
static Sys_var_bit Sys_transaction_allow_batching ("transaction_allow_batching", "transaction_allow_batching", SESSION_ONLY(option_bits), NO_CMD_LINE, OPTION_ALLOW_BATCH, DEFAULT(false))
 
static Sys_var_bit Sys_sql_warnings ("sql_warnings", "sql_warnings", SESSION_VAR(option_bits), NO_CMD_LINE, OPTION_WARNINGS, DEFAULT(false))
 
static Sys_var_bit Sys_sql_notes ("sql_notes", "sql_notes", SESSION_VAR(option_bits), NO_CMD_LINE, OPTION_SQL_NOTES, DEFAULT(true))
 
static Sys_var_bit Sys_auto_is_null ("sql_auto_is_null", "sql_auto_is_null", HINT_UPDATEABLE SESSION_VAR(option_bits), NO_CMD_LINE, OPTION_AUTO_IS_NULL, DEFAULT(false), NO_MUTEX_GUARD, IN_BINLOG)
 
static Sys_var_bit Sys_safe_updates ("sql_safe_updates", "sql_safe_updates", HINT_UPDATEABLE SESSION_VAR(option_bits), NO_CMD_LINE, OPTION_SAFE_UPDATES, DEFAULT(false))
 
static Sys_var_bit Sys_buffer_results ("sql_buffer_result", "sql_buffer_result", HINT_UPDATEABLE SESSION_VAR(option_bits), NO_CMD_LINE, OPTION_BUFFER_RESULT, DEFAULT(false))
 
static Sys_var_bit Sys_quote_show_create ("sql_quote_show_create", "sql_quote_show_create", SESSION_VAR(option_bits), NO_CMD_LINE, OPTION_QUOTE_SHOW_CREATE, DEFAULT(true))
 
static Sys_var_bit Sys_foreign_key_checks ("foreign_key_checks", "foreign_key_checks", HINT_UPDATEABLE SESSION_VAR(option_bits), NO_CMD_LINE, REVERSE(OPTION_NO_FOREIGN_KEY_CHECKS), DEFAULT(true), NO_MUTEX_GUARD, IN_BINLOG)
 
static Sys_var_bit Sys_unique_checks ("unique_checks", "unique_checks", HINT_UPDATEABLE SESSION_VAR(option_bits), NO_CMD_LINE, REVERSE(OPTION_RELAXED_UNIQUE_CHECKS), DEFAULT(true), NO_MUTEX_GUARD, IN_BINLOG)
 
static Sys_var_bit Sys_profiling ("profiling", "profiling", SESSION_VAR(option_bits), NO_CMD_LINE, OPTION_PROFILING, DEFAULT(false), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), PRE_UPDATE(nullptr), ON_UPDATE(nullptr), DEPRECATED_VAR(""))
 
static Sys_var_ulong Sys_profiling_history_size ("profiling_history_size", "Limit of query profiling memory", SESSION_VAR(profiling_history_size), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, 100), DEFAULT(15), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(nullptr), DEPRECATED_VAR(""))
 
static Sys_var_harows Sys_select_limit ("sql_select_limit", "The maximum number of rows to return from SELECT statements", HINT_UPDATEABLE SESSION_VAR(select_limit), NO_CMD_LINE, VALID_RANGE(0, HA_POS_ERROR), DEFAULT(HA_POS_ERROR), BLOCK_SIZE(1))
 
static Sys_var_session_special_double Sys_timestamp ("timestamp", "Set the time for this client", HINT_UPDATEABLE sys_var::ONLY_SESSION, NO_CMD_LINE, VALID_RANGE(0, 0), BLOCK_SIZE(1), NO_MUTEX_GUARD, IN_BINLOG, ON_CHECK(check_timestamp), ON_UPDATE(update_timestamp), ON_READ(read_timestamp))
 
static Sys_var_session_special Sys_last_insert_id ("last_insert_id", "The value to be returned from LAST_INSERT_ID()", sys_var::ONLY_SESSION, NO_CMD_LINE, VALID_RANGE(0, ULLONG_MAX), BLOCK_SIZE(1), NO_MUTEX_GUARD, IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(update_last_insert_id), ON_READ(read_last_insert_id))
 
static Sys_var_session_special Sys_identity ("identity", "Synonym for the last_insert_id variable", sys_var::ONLY_SESSION, NO_CMD_LINE, VALID_RANGE(0, ULLONG_MAX), BLOCK_SIZE(1), NO_MUTEX_GUARD, IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(update_last_insert_id), ON_READ(read_last_insert_id))
 
static Sys_var_session_special Sys_insert_id ("insert_id", "The value to be used by the following INSERT " "or ALTER TABLE statement when inserting an AUTO_INCREMENT value", HINT_UPDATEABLE sys_var::ONLY_SESSION, NO_CMD_LINE, VALID_RANGE(0, ULLONG_MAX), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(update_insert_id), ON_READ(read_insert_id))
 
static Sys_var_session_special Sys_rand_seed1 ("rand_seed1", "Sets the internal state of the RAND() " "generator for replication purposes", sys_var::ONLY_SESSION, NO_CMD_LINE, VALID_RANGE(0, ULONG_MAX), BLOCK_SIZE(1), NO_MUTEX_GUARD, IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(update_rand_seed1), ON_READ(read_rand_seed))
 
static Sys_var_session_special Sys_rand_seed2 ("rand_seed2", "Sets the internal state of the RAND() " "generator for replication purposes", sys_var::ONLY_SESSION, NO_CMD_LINE, VALID_RANGE(0, ULONG_MAX), BLOCK_SIZE(1), NO_MUTEX_GUARD, IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(update_rand_seed2), ON_READ(read_rand_seed))
 
static Sys_var_session_special Sys_error_count ("error_count", "The number of errors that resulted from the " "last statement that generated messages", READ_ONLY sys_var::ONLY_SESSION, NO_CMD_LINE, VALID_RANGE(0, ULLONG_MAX), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(nullptr), ON_READ(read_error_count))
 
static Sys_var_session_special Sys_warning_count ("warning_count", "The number of errors, warnings, and notes " "that resulted from the last statement that generated messages", READ_ONLY sys_var::ONLY_SESSION, NO_CMD_LINE, VALID_RANGE(0, ULLONG_MAX), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(nullptr), ON_READ(read_warning_count))
 
static Sys_var_ulong Sys_default_week_format ("default_week_format", "The default week format used by WEEK() functions", SESSION_VAR(default_week_format), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, 7), DEFAULT(0), BLOCK_SIZE(1))
 
static Sys_var_ulong Sys_group_concat_max_len ("group_concat_max_len", "The maximum length of the result of function GROUP_CONCAT()", HINT_UPDATEABLE SESSION_VAR(group_concat_max_len), CMD_LINE(REQUIRED_ARG), VALID_RANGE(4, ULONG_MAX), DEFAULT(1024), BLOCK_SIZE(1))
 
static char * glob_hostname_ptr
 
static Sys_var_charptr Sys_hostname ("hostname", "Server host name", READ_ONLY NON_PERSIST GLOBAL_VAR(glob_hostname_ptr), NO_CMD_LINE, IN_FS_CHARSET, DEFAULT(glob_hostname))
 
static Sys_var_charptr Sys_repl_report_host ("report_host", "Hostname or IP that this replica will report to the source while " "initiating the replication connection. Will appear in the output of " "SHOW REPLICAS. Leave this unset if you do not want the replica to " "register itself with the source. Note that it is not sufficient for " "the source to simply read the IP of the replica off the socket once the " "replica connects: in the presence of NAT other routing features, that IP " "may not be valid for connecting to the replica from the source or other " "hosts.", READ_ONLY GLOBAL_VAR(report_host), CMD_LINE(REQUIRED_ARG), IN_FS_CHARSET, DEFAULT(nullptr))
 
static Sys_var_charptr Sys_repl_report_user ("report_user", "The account user name that this replica will report to the source " "while initiating the replication connection.", READ_ONLY GLOBAL_VAR(report_user), CMD_LINE(REQUIRED_ARG), IN_FS_CHARSET, DEFAULT(nullptr))
 
static Sys_var_charptr Sys_repl_report_password ("report_password", "The account password that this replica will report to the source " "while initiating the replication connection.", READ_ONLY GLOBAL_VAR(report_password), CMD_LINE(REQUIRED_ARG), IN_FS_CHARSET, DEFAULT(nullptr))
 
static Sys_var_uint Sys_repl_report_port ("report_port", "The port for connecting to the replica, which this replica will report " "to the source while initiating the replication connection. " "Set it only if the replica is listening on a non-default " "port or if you have a special tunnel from the source or other clients " "to this replica. If not sure, leave this option unset.", READ_ONLY GLOBAL_VAR(report_port), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, 65535), DEFAULT(0), BLOCK_SIZE(1))
 
static Sys_var_bool Sys_keep_files_on_create ("keep_files_on_create", "Don't overwrite stale .MYD and .MYI even if no directory is specified", SESSION_VAR(keep_files_on_create), CMD_LINE(OPT_ARG), DEFAULT(false))
 
static char * license
 
static Sys_var_charptr Sys_license ("license", "The type of license the server has", READ_ONLY NON_PERSIST GLOBAL_VAR(license), NO_CMD_LINE, IN_SYSTEM_CHARSET, DEFAULT(STRINGIFY_ARG(LICENSE)))
 
static Sys_var_charptr Sys_general_log_path ("general_log_file", "Log connections and queries to given file", GLOBAL_VAR(opt_general_logname), CMD_LINE(REQUIRED_ARG), IN_FS_CHARSET, DEFAULT(nullptr), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_log_path), ON_UPDATE(fix_general_log_file))
 
static Sys_var_charptr Sys_slow_log_path ("slow_query_log_file", "Log slow queries to given log file. " "Defaults logging to hostname-slow.log. Must be enabled to activate " "other slow log options", GLOBAL_VAR(opt_slow_logname), CMD_LINE(REQUIRED_ARG), IN_FS_CHARSET, DEFAULT(nullptr), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_log_path), ON_UPDATE(fix_slow_log_file))
 
static Sys_var_have Sys_have_compress ("have_compress", "have_compress", READ_ONLY NON_PERSIST GLOBAL_VAR(have_compress), NO_CMD_LINE)
 
static Sys_var_have Sys_have_dlopen ("have_dynamic_loading", "have_dynamic_loading", READ_ONLY NON_PERSIST GLOBAL_VAR(have_dlopen), NO_CMD_LINE)
 
static Sys_var_have Sys_have_geometry ("have_geometry", "have_geometry", READ_ONLY NON_PERSIST GLOBAL_VAR(have_geometry), NO_CMD_LINE)
 
enum SHOW_COMP_OPTION Sys_var_have_func
 
static Sys_var_have Sys_have_profiling ("have_profiling", "have_profiling", READ_ONLY NON_PERSIST GLOBAL_VAR(have_profiling), NO_CMD_LINE, NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(nullptr), DEPRECATED_VAR(""))
 
static Sys_var_have Sys_have_query_cache ("have_query_cache", "have_query_cache. " "This variable is deprecated and will be removed in a future release.", READ_ONLY NON_PERSIST GLOBAL_VAR(have_query_cache), NO_CMD_LINE, NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(nullptr), DEPRECATED_VAR(""))
 
static Sys_var_have Sys_have_rtree_keys ("have_rtree_keys", "have_rtree_keys", READ_ONLY NON_PERSIST GLOBAL_VAR(have_rtree_keys), NO_CMD_LINE)
 
static Sys_var_have Sys_have_symlink ("have_symlink", "have_symlink", READ_ONLY NON_PERSIST GLOBAL_VAR(have_symlink), NO_CMD_LINE)
 
static Sys_var_have Sys_have_statement_timeout ("have_statement_timeout", "have_statement_timeout", READ_ONLY NON_PERSIST GLOBAL_VAR(have_statement_timeout), NO_CMD_LINE)
 
static Sys_var_bool Sys_general_log ("general_log", "Log connections and queries to a table or log file. " "Defaults to logging to a file hostname.log, " "or if --log-output=TABLE is used, to a table mysql.general_log.", GLOBAL_VAR(opt_general_log), CMD_LINE(OPT_ARG), DEFAULT(false), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(fix_general_log_state))
 
static Sys_var_bool Sys_log_raw ("log_raw", "Log to general log before any rewriting of the query. For use in " "debugging, not production as sensitive information may be logged.", GLOBAL_VAR(opt_general_log_raw), CMD_LINE(OPT_ARG), DEFAULT(false), NO_MUTEX_GUARD, NOT_IN_BINLOG)
 
static Sys_var_bool Sys_slow_query_log ("slow_query_log", "Log slow queries to a table or log file. Defaults logging to a file " "hostname-slow.log or a table mysql.slow_log if --log-output=TABLE is " "used. Must be enabled to activate other slow log options", GLOBAL_VAR(opt_slow_log), CMD_LINE(OPT_ARG), DEFAULT(false), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(fix_slow_log_state))
 
static Sys_var_bool Sys_slow_log_extra ("log_slow_extra", "Print more attributes to the slow query log file. Has no effect on " "logging to table.", GLOBAL_VAR(opt_log_slow_extra), CMD_LINE(OPT_ARG), DEFAULT(false), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_slow_log_extra), ON_UPDATE(nullptr))
 
static const char * log_output_names [] = {"NONE", "FILE", "TABLE", nullptr}
 
static Sys_var_set Sys_log_output ("log_output", "Syntax: log-output=value[,value...], " "where \"value\" could be TABLE, FILE or NONE", GLOBAL_VAR(log_output_options), CMD_LINE(REQUIRED_ARG), log_output_names, DEFAULT(LOG_FILE), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_not_empty_set), ON_UPDATE(fix_log_output))
 
static Sys_var_bool Sys_log_replica_updates ("log_replica_updates", "If enabled, the replication applier threads will write to this server's " "binary log.", READ_ONLY GLOBAL_VAR(opt_log_replica_updates), CMD_LINE(OPT_ARG, OPT_LOG_REPLICA_UPDATES), DEFAULT(1))
 
static Sys_var_deprecated_alias Sys_log_slave_updates ("log_slave_updates", Sys_log_replica_updates)
 
static Sys_var_charptr Sys_relay_log ("relay_log", "The location and name to use for relay logs", READ_ONLY NON_PERSIST GLOBAL_VAR(opt_relay_logname), CMD_LINE(REQUIRED_ARG), IN_FS_CHARSET, DEFAULT(nullptr))
 
static Sys_var_charptr Sys_relay_log_index ("relay_log_index", "The location and name to use for the file " "that keeps a list of the last relay logs", READ_ONLY NON_PERSIST GLOBAL_VAR(relay_log_index), NO_CMD_LINE, IN_FS_CHARSET, DEFAULT(nullptr))
 
static Sys_var_charptr Sys_binlog_index ("log_bin_index", "File that holds the names for last binary log files.", READ_ONLY NON_PERSIST GLOBAL_VAR(log_bin_index), NO_CMD_LINE, IN_FS_CHARSET, DEFAULT(nullptr))
 
static Sys_var_charptr Sys_relay_log_basename ("relay_log_basename", "The full path of the relay log file names, excluding the extension.", READ_ONLY NON_PERSIST GLOBAL_VAR(relay_log_basename), NO_CMD_LINE, IN_FS_CHARSET, DEFAULT(nullptr))
 
static Sys_var_charptr Sys_log_bin_basename ("log_bin_basename", "The full path of the binary log file names, excluding the extension.", READ_ONLY NON_PERSIST GLOBAL_VAR(log_bin_basename), NO_CMD_LINE, IN_FS_CHARSET, DEFAULT(nullptr))
 
static Sys_var_bool Sys_relay_log_purge ("relay_log_purge", "if disabled - do not purge relay logs. " "if enabled - purge them as soon as they are no more needed", GLOBAL_VAR(relay_log_purge), CMD_LINE(OPT_ARG), DEFAULT(true))
 
static Sys_var_bool Sys_relay_log_recovery ("relay_log_recovery", "If enabled, existing relay logs will be skipped by the " "replication threads. The receiver will start a new relay " "log and the applier will start reading from the beginning of that file. " "The receiver's position relative to the source will be reset to the " "applier's " "position relative to the source; the receiver uses this in case " "SOURCE_AUTO_POSITION=0.", READ_ONLY GLOBAL_VAR(relay_log_recovery), CMD_LINE(OPT_ARG), DEFAULT(false))
 
static Sys_var_ulong Sys_rpl_read_size ("rpl_read_size", "The size for reads done from the binlog and relay log. " "It must be a multiple of 4kb. Making it larger might help with IO " "stalls while reading these files when they are not in the OS buffer " "cache", GLOBAL_VAR(rpl_read_size), CMD_LINE(REQUIRED_ARG), VALID_RANGE(IO_SIZE *2, ULONG_MAX), DEFAULT(IO_SIZE *2), BLOCK_SIZE(IO_SIZE))
 
static Sys_var_bool Sys_replica_allow_batching ("replica_allow_batching", "Allow this replica to batch requests when " "using the NDB storage engine.", GLOBAL_VAR(opt_replica_allow_batching), CMD_LINE(OPT_ARG), DEFAULT(true))
 
static Sys_var_deprecated_alias Sys_slave_allow_batching ("slave_allow_batching", Sys_replica_allow_batching)
 
static Sys_var_charptr Sys_replica_load_tmpdir ("replica_load_tmpdir", "The location where this replica will store temporary files when " "replicating a LOAD DATA INFILE command from a source having " "binlog_format=STATEMENT.", READ_ONLY NON_PERSIST GLOBAL_VAR(replica_load_tmpdir), CMD_LINE(REQUIRED_ARG), IN_FS_CHARSET, DEFAULT(nullptr))
 
static Sys_var_deprecated_alias Sys_slave_load_tmpdir ("slave_load_tmpdir", Sys_replica_load_tmpdir)
 
static PolyLock_mutex PLock_replica_net_timeout & LOCK_replica_net_timeout
 
static Sys_var_uint Sys_replica_net_timeout ("replica_net_timeout", "Number of seconds to wait for more data " "from a replication connection before aborting the read.", GLOBAL_VAR(replica_net_timeout), CMD_LINE(REQUIRED_ARG), VALID_RANGE(1, LONG_TIMEOUT), DEFAULT(REPLICA_NET_TIMEOUT), BLOCK_SIZE(1), &PLock_replica_net_timeout, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(fix_replica_net_timeout))
 
static Sys_var_deprecated_alias Sys_slave_net_timeout ("slave_net_timeout", Sys_replica_net_timeout)
 
static PolyLock_mutex PLock_sql_replica_skip_counter & LOCK_sql_replica_skip_counter
 
static Sys_var_uint Sys_sql_replica_skip_counter ("sql_replica_skip_counter", "sql_replica_skip_counter", GLOBAL_VAR(sql_replica_skip_counter), NO_CMD_LINE, VALID_RANGE(0, UINT_MAX), DEFAULT(0), BLOCK_SIZE(1), &PLock_sql_replica_skip_counter, NOT_IN_BINLOG, ON_CHECK(check_slave_skip_counter))
 
static Sys_var_deprecated_alias Sys_sql_slave_skip_counter ("sql_slave_skip_counter", Sys_sql_replica_skip_counter)
 
static Sys_var_charptr Sys_replica_skip_errors ("replica_skip_errors", "Comma-separated list of error numbers. If an applier thread on this " "replica encounters one of these errors while applying a Query_log_event, " "it will ignore the error, rather than stop.", READ_ONLY GLOBAL_VAR(opt_replica_skip_errors), CMD_LINE(REQUIRED_ARG), IN_SYSTEM_CHARSET, DEFAULT(nullptr))
 
static Sys_var_deprecated_alias Sys_slave_skip_errors ("slave_skip_errors", Sys_replica_skip_errors)
 
static Sys_var_ulonglong Sys_relay_log_space_limit ("relay_log_space_limit", "Maximum space to use for all relay logs", READ_ONLY GLOBAL_VAR(relay_log_space_limit), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, ULLONG_MAX), DEFAULT(0), BLOCK_SIZE(1))
 
static Sys_var_uint Sys_sync_relaylog_period ("sync_relay_log", "Synchronously flush relay log to disk after " "every #th event. Use 0 to disable synchronous flushing", GLOBAL_VAR(sync_relaylog_period), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, UINT_MAX), DEFAULT(10000), BLOCK_SIZE(1))
 
static Sys_var_uint Sys_sync_relayloginfo_period ("sync_relay_log_info", "Synchronously flush relay log info " "to disk after every #th transaction. Use 0 to disable " "synchronous flushing. This variable is deprecated and will be removed in " "a future version.", GLOBAL_VAR(sync_relayloginfo_period), CMD_LINE(REQUIRED_ARG, OPT_SYNC_RELAY_LOG_INFO), VALID_RANGE(0, UINT_MAX), DEFAULT(10000), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(nullptr), DEPRECATED_VAR(""))
 
static Sys_var_uint Sys_replica_checkpoint_period ("replica_checkpoint_period", "When using a multi-threaded applier (replica_parallel_workers>0), it " "will update the worker progress status periodically. This option " "specifies the maximum number of milliseconds between updates.", GLOBAL_VAR(opt_mta_checkpoint_period), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, UINT_MAX), DEFAULT(300), BLOCK_SIZE(1))
 
static Sys_var_deprecated_alias Sys_slave_checkpoint_period ("slave_checkpoint_period", Sys_replica_checkpoint_period)
 
static Sys_var_uint Sys_replica_checkpoint_group ("replica_checkpoint_group", "When using multi-threaded applier (replica_parallel_workers>0), it will " "update the worker progress status periodically. This option specifies " "the maximum number of committed transactions between updates.", GLOBAL_VAR(opt_mta_checkpoint_group), CMD_LINE(REQUIRED_ARG), VALID_RANGE(1, MTS_MAX_BITS_IN_GROUP), DEFAULT(512), BLOCK_SIZE(1))
 
static Sys_var_deprecated_alias Sys_slave_checkpoint_group ("slave_checkpoint_group", Sys_replica_checkpoint_group)
 
static Sys_var_uint Sys_sync_binlog_period ("sync_binlog", "Synchronously flush binary log to disk after" " every #th write to the file. Use 0 to disable synchronous" " flushing", GLOBAL_VAR(sync_binlog_period), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, UINT_MAX), DEFAULT(1), BLOCK_SIZE(1))
 
static Sys_var_uint Sys_sync_source_info ("sync_source_info", "Synchronize replication receiver positions to disk periodically, after " "the specified number of events. Use 0 to disable periodic " "synchronization.", GLOBAL_VAR(sync_masterinfo_period), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, UINT_MAX), DEFAULT(10000), BLOCK_SIZE(1))
 
static Sys_var_deprecated_alias Sys_sync_master_info ("sync_master_info", Sys_sync_source_info)
 
static Sys_var_ulonglong Sys_var_original_commit_timestamp ("original_commit_timestamp", "The time when the current transaction was committed on the originating " "source, measured in microseconds since 1970 (the \"epoch\").", SESSION_ONLY(original_commit_timestamp), NO_CMD_LINE, VALID_RANGE(0, MAX_COMMIT_TIMESTAMP_VALUE), DEFAULT(MAX_COMMIT_TIMESTAMP_VALUE), BLOCK_SIZE(1), NO_MUTEX_GUARD, IN_BINLOG, ON_CHECK(check_session_admin_or_replication_applier))
 
static Sys_var_ulong Sys_replica_transaction_retries ("replica_transaction_retries", "Number of times the replication applier will retry a transaction in " "case it failed with a deadlock or other transient error, before it gives " "up and stops.", GLOBAL_VAR(slave_trans_retries), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, ULONG_MAX), DEFAULT(10), BLOCK_SIZE(1))
 
static Sys_var_deprecated_alias Sys_slave_transaction_retries ("slave_transaction_retries", Sys_replica_transaction_retries)
 
static Sys_var_ulong Sys_replica_parallel_workers ("replica_parallel_workers", "Number of worker threads for executing events in parallel ", PERSIST_AS_READONLY GLOBAL_VAR(opt_mts_replica_parallel_workers), CMD_LINE(REQUIRED_ARG, OPT_REPLICA_PARALLEL_WORKERS), VALID_RANGE(0, MTS_MAX_WORKERS), DEFAULT(4), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(replica_parallel_workers_update))
 
static Sys_var_deprecated_alias Sys_slave_parallel_workers ("slave_parallel_workers", Sys_replica_parallel_workers)
 
static Sys_var_ulonglong Sys_replica_pending_jobs_size_max ("replica_pending_jobs_size_max", "Soft limit on the size, in bytes, of per-worker queues of events that " "have not yet been applied. The queue size may exceed this limit in case " "a single event is bigger than the limit.", GLOBAL_VAR(opt_mts_pending_jobs_size_max), CMD_LINE(REQUIRED_ARG), VALID_RANGE(1024,(ulonglong) ~(intptr) 0), DEFAULT(128 *1024 *1024), BLOCK_SIZE(1024), ON_CHECK(nullptr))
 
static Sys_var_deprecated_alias Sys_slave_pending_jobs_size_max ("slave_pending_jobs_size_max", Sys_replica_pending_jobs_size_max)
 
static Sys_var_struct< MY_LOCALE, Get_locale_name > Sys_lc_messages ("lc_messages", "Set the language used for the error messages", SESSION_VAR(lc_messages), NO_CMD_LINE, DEFAULT(&my_default_lc_messages), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_locale))
 
static Sys_var_struct< MY_LOCALE, Get_locale_name > Sys_lc_time_names ("lc_time_names", "Set the language used for the month " "names and the days of the week", SESSION_VAR(lc_time_names), NO_CMD_LINE, DEFAULT(&my_default_lc_time_names), NO_MUTEX_GUARD, IN_BINLOG, ON_CHECK(check_locale))
 
static Sys_var_tz Sys_time_zone ("time_zone", "time_zone", HINT_UPDATEABLE SESSION_VAR(time_zone), NO_CMD_LINE, DEFAULT(&default_tz), NO_MUTEX_GUARD, IN_BINLOG)
 
static Sys_var_uint Sys_host_cache_size ("host_cache_size", "How many host names should be cached to avoid resolving.", GLOBAL_VAR(host_cache_size), CMD_LINE(REQUIRED_ARG, OPT_HOST_CACHE_SIZE), VALID_RANGE(0, 65536), DEFAULT(HOST_CACHE_SIZE), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(fix_host_cache_size))
 
const Sys_var_multi_enum::ALIAS enforce_gtid_consistency_aliases []
 
static Sys_var_enforce_gtid_consistency Sys_enforce_gtid_consistency ("enforce_gtid_consistency", "Prevents execution of statements that would be impossible to log " "in a transactionally safe manner. Currently, the disallowed " "statements include CREATE TEMPORARY TABLE inside transactions, " "all updates to non-transactional tables, and CREATE TABLE ... SELECT.", PERSIST_AS_READONLY GLOBAL_VAR(_gtid_consistency_mode), CMD_LINE(OPT_ARG, OPT_ENFORCE_GTID_CONSISTENCY), enforce_gtid_consistency_aliases, 3, DEFAULT(3), DEFAULT(GTID_CONSISTENCY_MODE_ON), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_session_admin_outside_trx_outside_sf_outside_sp))
 
static Sys_var_bool Sys_binlog_gtid_simple_recovery ("binlog_gtid_simple_recovery", "If this option is enabled, the server does not open more than " "two binary logs when initializing GTID_PURGED and " "GTID_EXECUTED, either during server restart or when binary " "logs are being purged. Enabling this option is useful when " "the server has already generated many binary logs without " "GTID events (e.g., having GTID_MODE = OFF). Note: If this " "option is enabled, GLOBAL.GTID_EXECUTED and " "GLOBAL.GTID_PURGED may be initialized wrongly in two cases: " "(1) All binary logs were generated by MySQL 5.7.5 or older, " "and GTID_MODE was ON for some binary logs but OFF for the " "newest binary log. (2) The oldest existing binary log was " "generated by MySQL 5.7.5 or older, and SET GTID_PURGED was " "issued after the oldest binary log was generated. If a wrong " "set is computed in one of case (1) or case (2), it will " "remain wrong even if the server is later restarted with this " "option disabled.", READ_ONLY GLOBAL_VAR(binlog_gtid_simple_recovery), CMD_LINE(OPT_ARG), DEFAULT(true))
 
static Sys_var_ulong Sys_sp_cache_size ("stored_program_cache", "The soft upper limit for number of cached stored routines for " "one connection.", GLOBAL_VAR(stored_program_cache_size), CMD_LINE(REQUIRED_ARG), VALID_RANGE(16, 512 *1024), DEFAULT(256), BLOCK_SIZE(1))
 
static Sys_var_bool Sys_pseudo_replica_mode ("pseudo_replica_mode", "Internal variable that will be enabled while applying a " "Format_description_log_event encoded in a BINLOG statement printed " "by mysqlbinlog.", SESSION_ONLY(pseudo_replica_mode), NO_CMD_LINE, DEFAULT(false), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_pseudo_replica_mode))
 
static Sys_var_deprecated_alias Sys_pseudo_slave_mode ("pseudo_slave_mode", Sys_pseudo_replica_mode)
 
static Sys_var_gtid_next Sys_gtid_next ("gtid_next", "Specifies the Global Transaction Identifier for the following " "transaction.", SESSION_ONLY(gtid_next), NO_CMD_LINE, DEFAULT("AUTOMATIC"), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_gtid_next))
 
export sys_varSys_gtid_next_ptr = &Sys_gtid_next
 
static Sys_var_gtid_executed Sys_gtid_executed ("gtid_executed", "The global variable contains the set of GTIDs in the " "binary log. The session variable contains the set of GTIDs " "in the current, ongoing transaction.")
 
Gtid_setgtid_purged
 
static Sys_var_gtid_purged Sys_gtid_purged ("gtid_purged", "The set of GTIDs that existed in previous, purged binary logs.", NON_PERSIST GLOBAL_VAR(gtid_purged), NO_CMD_LINE, DEFAULT(nullptr), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_gtid_purged))
 
export sys_varSys_gtid_purged_ptr = &Sys_gtid_purged
 
static Sys_var_gtid_owned Sys_gtid_owned ("gtid_owned", "The global variable lists all GTIDs owned by all threads. " "The session variable lists all GTIDs owned by the current thread.")
 
static Sys_var_gtid_mode Sys_gtid_mode ("gtid_mode", "Controls whether Global Transaction Identifiers (GTIDs) are " "enabled. Can be OFF, OFF_PERMISSIVE, ON_PERMISSIVE, or ON. OFF " "means that no transaction has a GTID. OFF_PERMISSIVE means that " "new transactions (committed in a client session using " "GTID_NEXT='AUTOMATIC') are not assigned any GTID, and " "replicated transactions are allowed to have or not have a " "GTID. ON_PERMISSIVE means that new transactions are assigned a " "GTID, and replicated transactions are allowed to have or not " "have a GTID. ON means that all transactions have a GTID. " "ON is required on a source before any replica can use " "SOURCE_AUTO_POSITION=1. To safely switch from OFF to ON, first " "set all servers to OFF_PERMISSIVE, then set all servers to " "ON_PERMISSIVE, then wait for all transactions without a GTID to " "be replicated and executed on all servers, and finally set all " "servers to GTID_MODE = ON.", PERSIST_AS_READONLY GLOBAL_VAR(Gtid_mode::sysvar_mode), CMD_LINE(REQUIRED_ARG), Gtid_mode::names, DEFAULT(Gtid_mode::DEFAULT), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_session_admin_outside_trx_outside_sf_outside_sp))
 
static Sys_var_uint Sys_gtid_executed_compression_period ("gtid_executed_compression_period", "Compress the mysql.gtid_executed table whenever this number of " "transactions have been added, by waking up a foreground thread " "(compress_gtid_table). This compression method only operates when " "binary logging is disabled on the replica; if binary logging is " "enabled, the table is compressed every time the binary log is " "rotated, and this value is ignored. Before MySQL 8.0.23, the " "default is 1000, and from MySQL 8.0.23, the default is zero, which " "disables this compression method. This is because in releases from " "MySQL 8.0.17, InnoDB transactions are written to the " "mysql.gtid_executed table by a separate process to non-InnoDB " "transactions. If the server has a mix of InnoDB and non-InnoDB " "transactions, attempting to compress the table with the " "compress_gtid_table thread can slow this process, so from " "MySQL 8.0.17 it is recommended that you set " "gtid_executed_compression_period to 0.", GLOBAL_VAR(gtid_executed_compression_period), CMD_LINE(OPT_ARG), VALID_RANGE(0, UINT_MAX32), DEFAULT(0), BLOCK_SIZE(1))
 
static Sys_var_bool Sys_disconnect_on_expired_password ("disconnect_on_expired_password", "Give clients that don't signal password expiration support execution " "time " "error(s) instead of connection error", READ_ONLY GLOBAL_VAR(disconnect_on_expired_password), CMD_LINE(OPT_ARG), DEFAULT(true))
 
static Sys_var_bool Sys_validate_user_plugins ("validate_user_plugins", "Turns on additional validation of authentication plugins assigned " "to user accounts. ", READ_ONLY NOT_VISIBLE GLOBAL_VAR(validate_user_plugins), CMD_LINE(OPT_ARG), DEFAULT(true), NO_MUTEX_GUARD, NOT_IN_BINLOG)
 
static Sys_var_enum Sys_block_encryption_mode ("block_encryption_mode", "mode for AES_ENCRYPT/AES_DECRYPT", SESSION_VAR(my_aes_mode), CMD_LINE(REQUIRED_ARG), my_aes_opmode_names, DEFAULT(my_aes_128_ecb))
 
static Sys_var_charptr Sys_track_session_sys_vars ("session_track_system_variables", "Track changes in registered system variables.", SESSION_VAR(track_sysvars_ptr), CMD_LINE(REQUIRED_ARG), IN_FS_CHARSET, DEFAULT("time_zone,autocommit,character_set_client,character_set_results," "character_set_connection"), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_track_session_sys_vars), ON_UPDATE(update_track_session_sys_vars))
 
export sys_varSys_track_session_sys_vars_ptr = &Sys_track_session_sys_vars
 
static Sys_var_bool Sys_session_track_schema ("session_track_schema", "Track changes to the 'default schema'.", SESSION_VAR(session_track_schema), CMD_LINE(OPT_ARG), DEFAULT(true), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(update_session_track_schema))
 
static const char * session_track_transaction_info_names []
 
static Sys_var_enum Sys_session_track_transaction_info ("session_track_transaction_info", "Track changes to the transaction attributes. OFF to disable; " "STATE to track just transaction state (Is there an active transaction? " "Does it have any data? etc.); CHARACTERISTICS to track transaction " "state " "and report all statements needed to start a transaction with the same " "characteristics (isolation level, read only/read write, snapshot - " "but not any work done / data modified within the transaction).", SESSION_VAR(session_track_transaction_info), CMD_LINE(REQUIRED_ARG), session_track_transaction_info_names, DEFAULT(TX_TRACK_NONE), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(update_session_track_tx_info))
 
static Sys_var_bool Sys_session_track_state_change ("session_track_state_change", "Track changes to the 'session state'.", SESSION_VAR(session_track_state_change), CMD_LINE(OPT_ARG), DEFAULT(false), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(update_session_track_state_change))
 
static Sys_var_bool Sys_offline_mode ("offline_mode", "Make the server into offline mode", GLOBAL_VAR(offline_mode), CMD_LINE(OPT_ARG), DEFAULT(false), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_offline_mode), ON_UPDATE(handle_offline_mode))
 
static Sys_var_charptr Sys_disabled_storage_engines ("disabled_storage_engines", "Limit CREATE TABLE for the storage engines listed", READ_ONLY GLOBAL_VAR(opt_disabled_storage_engines), CMD_LINE(REQUIRED_ARG), IN_SYSTEM_CHARSET, DEFAULT(""))
 
static PolyLock_mutex PLock_sys_mandatory_roles & LOCK_mandatory_roles
 
static Sys_var_lexstring Sys_mandatory_roles ("mandatory_roles", "All the specified roles are always considered granted to every user and " "they" " can't be revoked. Mandatory roles still require activation unless they " "are made into " "default roles. The granted roles will not be visible in the " "mysql.role_edges" " table.", GLOBAL_VAR(opt_mandatory_roles), CMD_LINE(REQUIRED_ARG), IN_SYSTEM_CHARSET, DEFAULT(""), &PLock_sys_mandatory_roles, NOT_IN_BINLOG, ON_CHECK(sysvar_check_authid_string), ON_UPDATE(sysvar_update_mandatory_roles))
 
static Sys_var_bool Sys_always_activate_granted_roles ("activate_all_roles_on_login", "Automatically set all granted roles as active after the user has " "authenticated successfully.", GLOBAL_VAR(opt_always_activate_granted_roles), CMD_LINE(OPT_ARG), DEFAULT(false), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(nullptr))
 
static PolyLock_mutex plock_sys_password_history & LOCK_password_history
 
static Sys_var_uint Sys_password_history ("password_history", "The number of old passwords to check in the history." " Set to 0 (the default) to turn the checks off", GLOBAL_VAR(global_password_history), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, UINT_MAX32), DEFAULT(0), BLOCK_SIZE(1), &plock_sys_password_history)
 
static PolyLock_mutex plock_sys_password_reuse_interval & LOCK_password_reuse_interval
 
static Sys_var_uint Sys_password_reuse_interval ("password_reuse_interval", "The minimum number of days that need to pass before a password can " "be reused. Set to 0 (the default) to turn the checks off", GLOBAL_VAR(global_password_reuse_interval), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, UINT_MAX32), DEFAULT(0), BLOCK_SIZE(1), &plock_sys_password_reuse_interval)
 
static const char * resultset_metadata_names [] = {"NONE", "FULL", NullS}
 
static Sys_var_enum Sys_resultset_metadata ("resultset_metadata", "Controls what meatadata the server will send to the client: " "either FULL (default) for all metadata, NONE for no metadata.", SESSION_ONLY(resultset_metadata), NO_CMD_LINE, resultset_metadata_names, DEFAULT(static_cast< ulong >(RESULTSET_METADATA_FULL)), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_resultset_metadata), ON_UPDATE(nullptr))
 
const char * binlog_row_value_options_names [] = {"PARTIAL_JSON", nullptr}
 
static Sys_var_set Sys_binlog_row_value_options ("binlog_row_value_options", "When set to PARTIAL_JSON, this option enables a space-efficient " "row-based binary log format for UPDATE statements that modify a " "JSON value using only the functions JSON_SET, JSON_REPLACE, and " "JSON_REMOVE. For such updates, only the modified parts of the " "JSON document are included in the binary log, so small changes of " "big documents may need significantly less space.", SESSION_VAR(binlog_row_value_options), CMD_LINE(REQUIRED_ARG), binlog_row_value_options_names, DEFAULT(0), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_binlog_row_value_options))
 
static PolyLock_mutex PLock_keyring_operations & LOCK_keyring_operations
 This is a mutex used to protect global variable @keyring_operations. More...
 
static Sys_var_bool Sys_keyring_operations ("keyring_operations", "This variable provides access to keyring service APIs. When this " "option is disabled calls to keyring_key_generate(), keyring_key_store() " "and keyring_key_remove() will report error until this variable is " "enabled.", NON_PERSIST GLOBAL_VAR(opt_keyring_operations), NO_CMD_LINE, DEFAULT(true), &PLock_keyring_operations, NOT_IN_BINLOG, ON_CHECK(check_keyring_access), ON_UPDATE(nullptr))
 This variable provides access to keyring service APIs. More...
 
static Sys_var_struct< CHARSET_INFO, Get_name > Sys_default_collation_for_utf8mb4 ("default_collation_for_utf8mb4", "Controls default collation for utf8mb4 while replicating implicit " "utf8mb4 collations.", SESSION_VAR(default_collation_for_utf8mb4), NO_CMD_LINE, DEFAULT(&my_charset_utf8mb4_0900_ai_ci), NO_MUTEX_GUARD, IN_BINLOG, ON_CHECK(check_default_collation_for_utf8mb4), ON_UPDATE(update_deprecated))
 
static Sys_var_bool Sys_show_create_table_verbosity ("show_create_table_verbosity", "When this option is enabled, it increases the verbosity of " "'SHOW CREATE TABLE'.", SESSION_VAR(show_create_table_verbosity), CMD_LINE(OPT_ARG), DEFAULT(false), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(nullptr))
 
static const char * use_secondary_engine_values []
 
static Sys_var_enum Sys_use_secondary_engine ("use_secondary_engine", "Controls preparation of SELECT statements against secondary storage " "engine. Valid values: OFF/ON/FORCED. OFF = Prepare only against primary " "storage engine. ON = First prepare against secondary storage engine, " "reprepare against primary storage engine if error. FORCED = Prepare all " "SELECT statements referencing one or more base tables only against " "secondary storage engine.", HINT_UPDATEABLE SESSION_ONLY(use_secondary_engine), NO_CMD_LINE, use_secondary_engine_values, DEFAULT(SECONDARY_ENGINE_ON), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(nullptr))
 
static Sys_var_session_special Sys_statement_id ("statement_id", "statement_id: represents the id of the query " "When this option is enabled it returns the statement id to the client, " "the client can find more data about this query from the performance schema" "(such as: events_statements_history table, rpd_query_stats table etc) by " "searching for a specific statement_id value.", READ_ONLY sys_var::ONLY_SESSION, NO_CMD_LINE, VALID_RANGE(0, INT_MAX64), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(nullptr), ON_READ(read_statement_id))
 
static Sys_var_double Sys_secondary_engine_cost_threshold ("secondary_engine_cost_threshold", "Controls which statements to consider for execution in a secondary " "storage engine. Only statements that have a cost estimate higher than " "this value will be attempted executed in a secondary storage engine.", HINT_UPDATEABLE SESSION_VAR(secondary_engine_cost_threshold), CMD_LINE(OPT_ARG), VALID_RANGE(0, DBL_MAX), DEFAULT(100000), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(nullptr))
 Cost threshold for executing queries in a secondary storage engine. More...
 
static Sys_var_bool Sys_sql_require_primary_key
 
static Sys_var_bool Sys_sql_generate_invisible_primary_key ("sql_generate_invisible_primary_key", "When set, if a table is created without a primary key then server " "generates invisible auto-increment column as a primary key for the table.", SESSION_VAR(sql_generate_invisible_primary_key), CMD_LINE(OPT_ARG), DEFAULT(false), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_session_admin), ON_UPDATE(nullptr))
 
static Sys_var_bool Sys_show_gipk_in_create_table_and_information_schema ("show_gipk_in_create_table_and_information_schema", "When set, if a primary key is generated for a table then SHOW commands " "and INFORMATION_SCHEMA tables shows generated invisible primary key " "definition.", SESSION_VAR(show_gipk_in_create_table_and_information_schema), CMD_LINE(OPT_ARG), DEFAULT(true), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(nullptr))
 
static Sys_var_charptr Sys_sys_variables_admin_subject (PERSIST_ONLY_ADMIN_X509_SUBJECT, "The client peer certificate name required to enable setting all " "system variables via SET PERSIST[_ONLY]", READ_ONLY NON_PERSIST GLOBAL_VAR(sys_var_persist_only_admin_x509_subject), CMD_LINE(OPT_ARG), IN_SYSTEM_CHARSET, DEFAULT(""))
 
static Sys_var_ulong Sys_binlog_row_event_max_size ("binlog_row_event_max_size", "The maximum size of a row-based binary log event in bytes. Rows will be " "grouped into events smaller than this size if possible. " "The value has to be a multiple of 256.", READ_ONLY GLOBAL_VAR(binlog_row_event_max_size), CMD_LINE(REQUIRED_ARG), VALID_RANGE(256, ULONG_MAX), DEFAULT(8192), BLOCK_SIZE(256))
 
static const char * group_replication_consistency_names []
 
static Sys_var_enum Sys_group_replication_consistency ("group_replication_consistency", "Transaction consistency guarantee, possible values: EVENTUAL, " "BEFORE_ON_PRIMARY_FAILOVER, BEFORE, AFTER, BEFORE_AND_AFTER", SESSION_VAR(group_replication_consistency), CMD_LINE(OPT_ARG), group_replication_consistency_names, DEFAULT(GROUP_REPLICATION_CONSISTENCY_BEFORE_ON_PRIMARY_FAILOVER), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_group_replication_consistency), ON_UPDATE(nullptr))
 
static Sys_var_binlog_encryption Sys_binlog_encryption ("binlog_encryption", "Enable/disable binary and relay logs encryption.", GLOBAL_VAR(rpl_encryption.get_enabled_var()), CMD_LINE(OPT_ARG), DEFAULT(false), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_binlog_encryption_admin))
 
static Sys_var_bool Sys_binlog_rotate_encryption_master_key_at_startup ("binlog_rotate_encryption_master_key_at_startup", "Force binlog encryption master key rotation at startup", READ_ONLY GLOBAL_VAR(rpl_encryption.get_master_key_rotation_at_startup_var()), CMD_LINE(OPT_ARG), DEFAULT(false), NO_MUTEX_GUARD, NOT_IN_BINLOG)
 
static Sys_var_uint Sys_original_server_version ("original_server_version", "The version of the server where the transaction was originally executed", SESSION_ONLY(original_server_version), NO_CMD_LINE, VALID_RANGE(0, UNDEFINED_SERVER_VERSION), DEFAULT(UNDEFINED_SERVER_VERSION), BLOCK_SIZE(1), NO_MUTEX_GUARD, IN_BINLOG, ON_CHECK(check_session_admin_or_replication_applier))
 
static Sys_var_uint Sys_immediate_server_version ("immediate_server_version", "The server version of the immediate server in the replication topology", SESSION_ONLY(immediate_server_version), NO_CMD_LINE, VALID_RANGE(0, UNDEFINED_SERVER_VERSION), DEFAULT(UNDEFINED_SERVER_VERSION), BLOCK_SIZE(1), NO_MUTEX_GUARD, IN_BINLOG, ON_CHECK(check_session_admin_or_replication_applier))
 
static Sys_var_bool Sys_default_table_encryption ("default_table_encryption", "Database and tablespace are created with this default encryption property " "unless the user specifies an explicit encryption property.", HINT_UPDATEABLE SESSION_VAR(default_table_encryption), CMD_LINE(OPT_ARG), DEFAULT(false), NO_MUTEX_GUARD, IN_BINLOG, ON_CHECK(check_set_default_table_encryption_access), ON_UPDATE(nullptr))
 
static Sys_var_bool Sys_table_encryption_privilege_check ("table_encryption_privilege_check", "Indicates if server enables privilege check when user tries to use " "non-default value for CREATE DATABASE or CREATE TABLESPACE or when " "user tries to do CREATE TABLE with ENCRYPTION option which deviates " "from per-database default.", GLOBAL_VAR(opt_table_encryption_privilege_check), CMD_LINE(OPT_ARG), DEFAULT(false), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_set_table_encryption_privilege_access), ON_UPDATE(nullptr))
 
static Sys_var_bool Sys_var_print_identified_with_as_hex ("print_identified_with_as_hex", "SHOW CREATE USER will print the AS clause as HEX if it contains " "non-prinable characters", SESSION_VAR(print_identified_with_as_hex), CMD_LINE(OPT_ARG), DEFAULT(false))
 
static Sys_var_bool Sys_var_show_create_table_skip_secondary_engine ("show_create_table_skip_secondary_engine", "SHOW CREATE TABLE will skip SECONDARY_ENGINE when printing the table " "definition", SESSION_ONLY(show_create_table_skip_secondary_engine), NO_CMD_LINE, DEFAULT(false))
 Session only flag to skip printing secondary engine in SHOW CREATE TABLE. More...
 
static Sys_var_uint Sys_generated_random_password_length ("generated_random_password_length", "Determines the length randomly generated passwords in CREATE USER-," "SET PASSWORD- or ALTER USER statements", SESSION_VAR(generated_random_password_length), CMD_LINE(REQUIRED_ARG), VALID_RANGE(5, 255), DEFAULT(20), BLOCK_SIZE(1), NO_MUTEX_GUARD, IN_BINLOG, ON_CHECK(nullptr))
 
static Sys_var_charptr Sys_protocol_compression_algorithms ("protocol_compression_algorithms", "List of compression algorithms supported by server. Supported values " "are any combination of zlib, zstd, uncompressed. Command line clients " "may use the --compression-algorithms flag to specify a set of algorithms, " "and the connection will use an algorithm supported by both client and " "server. It picks zlib if both client and server support it; otherwise it " "picks zstd if both support it; otherwise it picks uncompressed if both " "support it; otherwise it fails.", GLOBAL_VAR(opt_protocol_compression_algorithms), CMD_LINE(REQUIRED_ARG), IN_FS_CHARSET, DEFAULT(const_cast< char * >(PROTOCOL_COMPRESSION_DEFAULT_VALUE)), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_set_protocol_compression_algorithms), ON_UPDATE(nullptr))
 
static Sys_var_bool Sys_var_require_row_format ("require_row_format", "Limit the application of queries to row based events " "and DDLs with the exception of temporary table creation/deletion.", SESSION_ONLY(require_row_format), NO_CMD_LINE, DEFAULT(false), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_set_require_row_format))
 Session only flag to limit the application of queries to row based events and DDLs with the exception of temporary table creation/deletion. More...
 
static Sys_var_bool Sys_replication_optimize_for_static_plugin_config ("replication_optimize_for_static_plugin_config", "Optional flag that blocks plugin install/uninstall and allows skipping " "the acquisition of the lock to read from the plugin list and the usage " "of read-optimized spin-locks. Use only when plugin hook callback needs " "optimization (a lot of semi-sync replicas, for instance).", GLOBAL_VAR(opt_replication_optimize_for_static_plugin_config), CMD_LINE(OPT_ARG), DEFAULT(false), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(handle_plugin_lock_type_change))
 
static Sys_var_bool Sys_replication_sender_observe_commit_only ("replication_sender_observe_commit_only", "Optional flag that allows for only calling back observer hooks at " "commit.", GLOBAL_VAR(opt_replication_sender_observe_commit_only), CMD_LINE(OPT_ARG), DEFAULT(false), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(nullptr))
 
static Sys_var_bool Sys_skip_replica_start ("skip_replica_start", "Do not start replication threads automatically " "when the server starts.", READ_ONLY GLOBAL_VAR(opt_skip_replica_start), CMD_LINE(OPT_ARG), DEFAULT(false), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(nullptr))
 
static PolyLock_mutex PLock_authentication_policy & LOCK_authentication_policy
 This is a mutex used to protect @global.authentication_policy variable. More...
 
static Sys_var_charptr Sys_authentication_policy ("authentication_policy", "Defines policies around how user account can be configured with Multi " "Factor authentication methods during CREATE/ALTER USER statement. " "This variable accepts at-most 3 comma separated list of authentication " "factor descriptions. Allowed factor descriptions are: " "(empty) - factor is optional, any authentication method is allowed. " "* - factor is mandatory, any authentication method is allowed. " "<plugin> - <plugin> is mandatory authentication method. " "*:<plugin> - factor is mandatory, <plugin> is default authentication " "method. The first factor cannot be optional and if neither mandatory nor " "default method is specified, caching_sha2_password is assumed as default.", GLOBAL_VAR(opt_authentication_policy), CMD_LINE(REQUIRED_ARG), IN_FS_CHARSET, DEFAULT("*,,"), &PLock_authentication_policy, NOT_IN_BINLOG, ON_CHECK(check_authentication_policy), ON_UPDATE(fix_authentication_policy))
 
static Sys_var_deprecated_alias Sys_skip_slave_start ("skip_slave_start", Sys_skip_replica_start)
 
static const char * terminology_use_previous_names []
 
static Sys_var_enum Sys_terminology_use_previous ("terminology_use_previous", "Make monitoring tables and statements use the identifiers that were " "in use before they were changed in a given release. That includes names " "for mutexes, read/write locks, condition variables, memory allocations, " "thread names, thread stages, and thread commands. When the session " "option is set to BEFORE_8_0_26, the session uses the names that were in " "use until 8.0.25, when it selects from performance_schema tables, or " "selects from INFORMATION_SCHEMA.PROCESSLIST, or issues SHOW PROCESSLIST " "or SHOW REPLICA STATUS. When the global option is set to BEFORE_8_0_26, " "new sessions use BEFORE_8_0_26 as default for the session option, and in " "addition the thread commands that were in use until 8.0.25 are written " "to the slow query log. If set to BEFORE_8_2_0 or less the command SHOW " "CREATE EVENT will show how the event would have been created in a server " "of a version lower than 8.2.0. SHOW EVENTS and queries into " "information_schema.events will also output the old terminology for the " "event status field.", SESSION_VAR(terminology_use_previous), CMD_LINE(REQUIRED_ARG), terminology_use_previous_names, DEFAULT(terminology_use_previous::NONE), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(nullptr), DEPRECATED_VAR(""))
 
static Sys_var_bool Sys_xa_detatch_on_prepare ("xa_detach_on_prepare", "When set, XA transactions will be detached (AKA dissociated or " "disconnected) from connection as part of XA PREPARE. This means that " "the XA transaction can be committed/rolled back by any connection, " "even if the starting connection has not terminated, and the starting " "connection can start new transactions. As a side effect, temporary " "tables cannot be used inside XA transactions. " "When disabled, XA transactions are associated with the same connection " "until the session disconnects. ON is the only safe choice for " "replication.", HINT_UPDATEABLE SESSION_VAR(xa_detach_on_prepare), CMD_LINE(OPT_ARG), DEFAULT(true), NO_MUTEX_GUARD, IN_BINLOG, ON_CHECK(check_session_admin_outside_trx_outside_sf))
 
static Sys_var_charptr Sys_debug_sensitive_session_string ("debug_sensitive_session_string", "Debug variable to test sensitive session string variable.", SENSITIVE SESSION_VAR(debug_sensitive_session_str), CMD_LINE(REQUIRED_ARG), IN_FS_CHARSET, DEFAULT(""))
 
static Sys_var_bool Sys_persist_sensitive_variables_in_plaintext ("persist_sensitive_variables_in_plaintext", "If set to FALSE, server will refuse to persist SENSITIVE variables in " "plaintext and refuse to start if encrypted part of persited file cannot " "be processed.", READ_ONLY NON_PERSIST GLOBAL_VAR(opt_persist_sensitive_variables_in_plaintext), CMD_LINE(OPT_ARG), DEFAULT(true), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(nullptr), nullptr, sys_var::PARSE_EARLY)
 
static const char * explain_format_names []
 
static Sys_var_enum Sys_explain_format ("explain_format", "The default format in which the EXPLAIN statement displays information. " "Valid values are TRADITIONAL (default), TREE, JSON and TRADITIONAL_STRICT." " TRADITIONAL_STRICT is only used internally by the mtr test suite, and is " "not meant to be used anywhere else.", SESSION_VAR(explain_format), CMD_LINE(OPT_ARG), explain_format_names, DEFAULT(static_cast< ulong >(Explain_format_type::TRADITIONAL)), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(nullptr))
 
static Sys_var_uint Sys_explain_json_format_version ("explain_json_format_version", "The JSON format version for EXPLAIN FORMAT=JSON queries with the old " "(non-hypergraph) join optimizer. " "Valid values are 1 and 2.", SESSION_VAR(explain_json_format_version), CMD_LINE(REQUIRED_ARG), VALID_RANGE(1, 2), DEFAULT(1), BLOCK_SIZE(1))
 
static Sys_var_bool Sys_tls_certificates_enforced_validation ("tls_certificates_enforced_validation", "If set to TRUE, server stops execution at the start up in case of invalid " "certificates " "When ALTER INSTANCE RELOAD TLS executed, new certficates will not be used " "if validation fails. ", READ_ONLY NON_PERSIST GLOBAL_VAR(opt_tls_certificates_enforced_validation), CMD_LINE(OPT_ARG), DEFAULT(false), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(nullptr))
 
static Sys_var_ulonglong Sys_set_operations_buffer_size ("set_operations_buffer_size", "The maximum size of the buffer used for hash based set operations ", HINT_UPDATEABLE SESSION_VAR(set_operations_buffer_size), CMD_LINE(REQUIRED_ARG), VALID_RANGE(16384, max_mem_sz), DEFAULT(256ULL *1024), BLOCK_SIZE(128))
 
static Sys_var_charptr Sys_debug_set_operations_secondary_overflow_at ("debug_set_operations_secondary_overflow_at", "Error injection", HINT_UPDATEABLE SESSION_VAR(debug_set_operations_secondary_overflow_at), CMD_LINE(REQUIRED_ARG), IN_FS_CHARSET, DEFAULT(""), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(nullptr))
 
Sys_var_bool anonymous_namespace{sys_vars.cc}::Sys_restrict_fk_on_non_standard_key ("restrict_fk_on_non_standard_key", "Disallow the creation of foreign keys referencing non-unique key " "or partial key", NON_PERSIST SESSION_VAR(restrict_fk_on_non_standard_key), CMD_LINE(OPT_ARG), DEFAULT(true), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(restrict_fk_on_non_standard_key_check), ON_UPDATE(nullptr))
 

Detailed Description

Definitions of all server's session or global variables.

How to add new variables:

  1. copy one of the existing variables, and edit the declaration.
  2. if you need special behavior on assignment or additional checks use ON_CHECK and ON_UPDATE callbacks.
  3. Don't add new Sys_var classes or uncle Occam will come with his razor to haunt you at nights

Note - all storage engine variables (for example myisam_whatever) should go into the corresponding storage engine sources (for example in storage/myisam/ha_myisam.cc) !

Macro Definition Documentation

◆ export

#define export   /* not static */

◆ PFS_TRAILING_PROPERTIES

#define PFS_TRAILING_PROPERTIES
Value:
static const int PARSE_EARLY
Definition: set_var.h:154
static Sys_var_ulong ON_UPDATE(nullptr))
static Sys_var_ulong NOT_IN_BINLOG
Definition: sys_vars.cc:4028
static Sys_var_ulong ON_CHECK(nullptr)
#define NO_MUTEX_GUARD
Definition: sys_vars.h:134

Function Documentation

◆ binlog_direct_check()

static bool binlog_direct_check ( sys_var self,
THD thd,
set_var var 
)
static

◆ binlog_format_check()

static bool binlog_format_check ( sys_var self,
THD thd,
set_var var 
)
static

◆ check_authentication_policy()

static bool check_authentication_policy ( sys_var ,
THD ,
set_var var 
)
static

◆ check_binlog_encryption_admin()

static bool check_binlog_encryption_admin ( sys_var ,
THD thd,
set_var  
)
static

◆ check_binlog_row_image()

static bool check_binlog_row_image ( sys_var self,
THD thd,
set_var var 
)
static

◆ check_binlog_row_value_options()

static bool check_binlog_row_value_options ( sys_var self,
THD thd,
set_var var 
)
static

◆ check_binlog_trx_compression()

static bool check_binlog_trx_compression ( sys_var self,
THD thd,
set_var var 
)
static

◆ check_charset()

static bool check_charset ( sys_var ,
THD thd,
set_var var 
)
static

◆ check_charset_db()

static bool check_charset_db ( sys_var self,
THD thd,
set_var var 
)
static

◆ check_charset_not_null()

static bool check_charset_not_null ( sys_var self,
THD thd,
set_var var 
)
static

◆ check_collation_db()

static bool check_collation_db ( sys_var self,
THD thd,
set_var var 
)
static

◆ check_collation_not_null()

static bool check_collation_not_null ( sys_var self,
THD thd,
set_var var 
)
static

◆ check_cs_client()

static bool check_cs_client ( sys_var self,
THD thd,
set_var var 
)
static

◆ check_cs_filesystem()

static bool check_cs_filesystem ( sys_var self,
THD thd,
set_var var 
)
static

◆ check_default_collation_for_utf8mb4()

static bool check_default_collation_for_utf8mb4 ( sys_var self,
THD thd,
set_var var 
)
static

◆ check_explicit_defaults_for_timestamp()

static bool check_explicit_defaults_for_timestamp ( sys_var self,
THD thd,
set_var var 
)
static

◆ check_ftb_syntax()

static bool check_ftb_syntax ( sys_var ,
THD ,
set_var var 
)
static

◆ check_group_replication_consistency()

static bool check_group_replication_consistency ( sys_var self,
THD thd,
set_var var 
)
static

◆ check_gtid_next()

static bool check_gtid_next ( sys_var self,
THD thd,
set_var var 
)
static

Check-function to @GTID_NEXT system variable.

Parameters
selfa pointer to the sys_var, i.e. gtid_next
thda reference to THD object
vara pointer to the set_var created by the parser.
Returns
false if the change is allowed, otherwise true.

◆ check_gtid_purged()

static bool check_gtid_purged ( sys_var self,
THD thd,
set_var var 
)
static

◆ check_init_string()

static bool check_init_string ( sys_var ,
THD ,
set_var var 
)
static

◆ check_keyring_access()

static bool check_keyring_access ( sys_var ,
THD thd,
set_var  
)
static

◆ check_locale()

static bool check_locale ( sys_var self,
THD thd,
set_var var 
)
static

◆ check_log_error_services()

static bool check_log_error_services ( sys_var self,
THD thd,
set_var var 
)
static

◆ check_log_error_suppression_list()

static bool check_log_error_suppression_list ( sys_var self,
THD thd,
set_var var 
)
static

◆ check_log_path()

static bool check_log_path ( sys_var self,
THD ,
set_var var 
)
static

◆ check_max_allowed_packet()

static bool check_max_allowed_packet ( sys_var self,
THD thd,
set_var var 
)
static

◆ check_max_delayed_threads()

static bool check_max_delayed_threads ( sys_var self,
THD thd,
set_var var 
)
static

◆ check_net_buffer_length()

static bool check_net_buffer_length ( sys_var self,
THD thd,
set_var var 
)
static

◆ check_not_empty_set()

static bool check_not_empty_set ( sys_var ,
THD ,
set_var var 
)
static

◆ check_not_null()

static bool check_not_null ( sys_var ,
THD ,
set_var var 
)
static

◆ check_not_null_not_empty()

static bool check_not_null_not_empty ( sys_var self,
THD thd,
set_var var 
)
static

empty value ('') is not allowed

◆ check_offline_mode()

static bool check_offline_mode ( sys_var ,
THD thd,
set_var  
)
static

Checks if user has an additional CONNECTION_ADMIN privilege, needed to modify OFFLINE_MODE system variable (unless having SUPER).

Return values
truefailure
falsesuccess
Parameters
thdthe session context

◆ check_optimizer_switch()

static bool check_optimizer_switch ( sys_var ,
THD thd,
set_var var 
)
static

◆ check_outside_trx()

static bool check_outside_trx ( sys_var var,
THD thd,
set_var  
)
static

◆ check_partial_revokes()

static bool check_partial_revokes ( sys_var self,
THD thd,
set_var setv 
)
static

Checks, if there exists at least a partial revoke on a database at the time of turning OFF the system variable "@@partial_revokes".

If it does then throw error. if there exists at least a DB grant with wildcard entry at the time of turning ON the system variable "@@partial_revokes". If it does then throw error.

Return values
truefailure
falsesuccess
Parameters
selfthe system variable to set value for
thdthe session context
setvthe SET operations metadata

◆ check_pseudo_replica_mode()

static bool check_pseudo_replica_mode ( sys_var self,
THD thd,
set_var var 
)
static

◆ check_read_only()

static bool check_read_only ( sys_var ,
THD thd,
set_var  
)
static

◆ check_require_secure_transport()

static bool check_require_secure_transport ( sys_var ,
THD ,
set_var var 
)
static

◆ check_resultset_metadata()

static bool check_resultset_metadata ( sys_var ,
THD thd,
set_var var 
)
static

◆ check_session_admin()

static bool check_session_admin ( sys_var self,
THD thd,
set_var setv 
)
static

Check if SESSION_VARIABLES_ADMIN granted.

Throw SQL error if not.

Use this when setting session variables that are sensitive and should be protected.

We also accept SYSTEM_VARIABLES_ADMIN since it doesn't make a lot of sense to be allowed to set the global variable and not the session ones.

Note
For compatibility we also accept SUPER.
Return values
truefailure
falsesuccess
Parameters
selfthe system variable to set value for
thdthe session context
setvthe SET operations metadata

◆ check_session_admin_no_super()

static bool check_session_admin_no_super ( sys_var self,
THD thd,
set_var setv 
)
static

Check if SESSION_VARIABLES_ADMIN granted.

Throw SQL error if not.

Use this when setting session variables that are sensitive and should be protected.

We also accept SYSTEM_VARIABLES_ADMIN since it doesn't make a lot of sense to be allowed to set the global variable and not the session ones.

Return values
truefailure
falsesuccess
Parameters
selfthe system variable to set value for
thdthe session context
setvthe SET operations metadata

◆ check_session_admin_or_replication_applier()

static bool check_session_admin_or_replication_applier ( sys_var self,
THD thd,
set_var setv 
)
static

Check if REPLICATION_APPLIER granted.

Throw SQL error if not.

Use this when setting session variables that are to be protected within replication applier context.

Note
For compatibility we also accept SUPER.
Return values
truefailure
falsesuccess
Parameters
selfthe system variable to set value for
thdthe session context
setvthe SET operations metadata

◆ check_session_admin_outside_trx_outside_sf()

static bool check_session_admin_outside_trx_outside_sf ( sys_var self,
THD thd,
set_var var 
)
static

◆ check_session_admin_outside_trx_outside_sf_outside_sp()

static bool check_session_admin_outside_trx_outside_sf_outside_sp ( sys_var self,
THD thd,
set_var var 
)
static

◆ check_session_admin_privileges_only()

static bool check_session_admin_privileges_only ( sys_var self,
THD thd,
set_var setv 
)
static

Utility method that checks if user has correct session administrative dynamic privileges.

Returns
0 on success, 1 on failure.

◆ check_set_default_table_encryption_access()

static bool check_set_default_table_encryption_access ( sys_var self,
THD thd,
set_var var 
)
static

◆ check_set_protocol_compression_algorithms()

static bool check_set_protocol_compression_algorithms ( sys_var ,
THD ,
set_var var 
)
static

◆ check_set_require_row_format()

static bool check_set_require_row_format ( sys_var ,
THD thd,
set_var var 
)
static

◆ check_set_table_encryption_privilege_access()

static bool check_set_table_encryption_privilege_access ( sys_var ,
THD thd,
set_var  
)
static

◆ check_slave_skip_counter()

static bool check_slave_skip_counter ( sys_var ,
THD thd,
set_var var 
)
static

◆ check_slave_stopped()

static bool check_slave_stopped ( sys_var self,
THD thd,
set_var var 
)
static

◆ check_slow_log_extra()

static bool check_slow_log_extra ( sys_var ,
THD thd,
set_var  
)
static

◆ check_sql_log_bin()

static bool check_sql_log_bin ( sys_var self,
THD thd,
set_var var 
)
static

This function checks if the sql_log_bin can be changed, what is possible if:

  • the user is a super user;
  • the set is not called from within a function/trigger;
  • there is no on-going transaction.
Parameters
thdCurrent thread
[in]selfA pointer to the sys_var, i.e. Sys_log_binlog.
[in]varA pointer to the set_var created by the parser.
Returns
false if the change is allowed, otherwise true.

◆ check_sql_mode()

static bool check_sql_mode ( sys_var ,
THD thd,
set_var var 
)
static

◆ check_storage_engine()

static bool check_storage_engine ( sys_var self,
THD thd,
set_var var 
)
static

Check storage engine is not empty and log warning.

Checks if default_storage_engine or default_tmp_storage_engine is set empty and return true. This method also logs warning if the storage engine set is a disabled storage engine specified in disabled_storage_engines. In addition, it checks if the requested storage engine can be used as default.

Parameters
selfpointer to system variable object.
thdConnection handle.
varpointer to set variable object.
Returns
true if the set variable is empty. false if the set variable is not empty.

◆ check_sub_modes_of_strict_mode()

static void check_sub_modes_of_strict_mode ( sql_mode_t sql_mode,
THD thd 
)
static

Check sql modes strict_mode, 'NO_ZERO_DATE', 'NO_ZERO_IN_DATE' and 'ERROR_FOR_DIVISION_BY_ZERO' are used together.

If only subset of it is set then warning is reported.

Parameters
sql_modesql mode.
thdCurrent thread

◆ check_tagged_gtid_next_privileges()

static bool check_tagged_gtid_next_privileges ( sys_var self,
THD thd,
set_var setv 
)
static

Check if correct privileges for GTID_NEXT tagged are granted.

Throw SQL error if not.

Use this when setting session variables that are to be protected within replication applier context.

Return values
truefailure
falsesuccess
Parameters
selfthe system variable to set value for
thdthe session context
setvthe SET operations metadata

◆ check_timestamp()

static bool check_timestamp ( sys_var ,
THD ,
set_var var 
)
static

◆ check_track_session_sys_vars()

static bool check_track_session_sys_vars ( sys_var ,
THD thd,
set_var var 
)
static

◆ check_transaction_isolation()

static bool check_transaction_isolation ( sys_var ,
THD thd,
set_var var 
)
static

Function to check if the 'next' transaction isolation level can be changed.

Parameters
[in]thdThread handler.
[in]varA pointer to set_var holding the specified list of system variable names.
Return values
falseSuccess.
trueError.

◆ check_transaction_read_only()

static bool check_transaction_read_only ( sys_var ,
THD thd,
set_var var 
)
static

Function to check if the state of 'transaction_read_only' can be changed.

The state cannot be changed if there is already a transaction in progress.

Parameters
[in]thdThread handler
[in]varA pointer to set_var holding the specified list of system variable names.
Return values
falseSuccess.
trueError.

◆ event_scheduler_check()

static bool event_scheduler_check ( sys_var ,
THD ,
set_var var 
)
static

◆ event_scheduler_restart()

static void event_scheduler_restart ( THD thd)
static

◆ event_scheduler_update()

static bool event_scheduler_update ( sys_var ,
THD ,
enum_var_type   
)
static

◆ expand_sql_mode()

export sql_mode_t expand_sql_mode ( sql_mode_t  sql_mode,
THD thd 
)

◆ fix_authentication_policy()

static bool fix_authentication_policy ( sys_var ,
THD ,
enum_var_type   
)
static

◆ fix_autocommit()

static bool fix_autocommit ( sys_var self,
THD thd,
enum_var_type  type 
)
static

◆ fix_binlog_cache_size()

static bool fix_binlog_cache_size ( sys_var ,
THD thd,
enum_var_type   
)
static

◆ fix_binlog_format_after_update()

static bool fix_binlog_format_after_update ( sys_var ,
THD thd,
enum_var_type  type 
)
static

◆ fix_binlog_stmt_cache_size()

static bool fix_binlog_stmt_cache_size ( sys_var ,
THD thd,
enum_var_type   
)
static

◆ fix_delay_key_write()

export bool fix_delay_key_write ( sys_var self,
THD thd,
enum_var_type  type 
)

◆ fix_general_log_file()

static bool fix_general_log_file ( sys_var ,
THD ,
enum_var_type   
)
static

◆ fix_general_log_state()

static bool fix_general_log_state ( sys_var ,
THD thd,
enum_var_type   
)
static

◆ fix_host_cache_size()

static bool fix_host_cache_size ( sys_var ,
THD ,
enum_var_type   
)
static

◆ fix_log_error_services()

static bool fix_log_error_services ( sys_var self,
THD thd,
enum_var_type  type 
)
static

◆ fix_log_error_suppression_list()

static bool fix_log_error_suppression_list ( sys_var self,
THD thd,
enum_var_type  type 
)
static

◆ fix_log_output()

static bool fix_log_output ( sys_var ,
THD ,
enum_var_type   
)
static

◆ fix_low_prio_updates()

static bool fix_low_prio_updates ( sys_var ,
THD thd,
enum_var_type  type 
)
static

◆ fix_max_binlog_size()

static bool fix_max_binlog_size ( sys_var ,
THD ,
enum_var_type   
)
static

◆ fix_max_join_size()

static bool fix_max_join_size ( sys_var self,
THD thd,
enum_var_type  type 
)
static

◆ fix_max_relay_log_size()

static bool fix_max_relay_log_size ( sys_var ,
THD ,
enum_var_type   
)
static

◆ fix_net_read_timeout()

static bool fix_net_read_timeout ( sys_var self,
THD thd,
enum_var_type  type 
)
static

◆ fix_net_retry_count()

static bool fix_net_retry_count ( sys_var self,
THD thd,
enum_var_type  type 
)
static

◆ fix_net_write_timeout()

static bool fix_net_write_timeout ( sys_var self,
THD thd,
enum_var_type  type 
)
static

◆ fix_read_only()

static bool fix_read_only ( sys_var self,
THD thd,
enum_var_type   
)
static

◆ fix_replica_net_timeout()

static bool fix_replica_net_timeout ( sys_var ,
THD thd,
enum_var_type   
)
static

◆ fix_server_id()

static bool fix_server_id ( sys_var ,
THD thd,
enum_var_type   
)
static

◆ fix_slow_log_file()

static bool fix_slow_log_file ( sys_var ,
THD thd,
enum_var_type   
)
static

◆ fix_slow_log_state()

static bool fix_slow_log_state ( sys_var ,
THD thd,
enum_var_type   
)
static

◆ fix_sql_log_bin_after_update()

static bool fix_sql_log_bin_after_update ( sys_var ,
THD thd,
enum_var_type  type 
)
static

This function sets the session variable thd->variables.sql_log_bin to reflect changes to @session.sql_log_bin.

Parameters
thdCurrent thread
[in]typeThe type either session or global.
Returns
false.

◆ fix_sql_mode()

static bool fix_sql_mode ( sys_var self,
THD thd,
enum_var_type  type 
)
static

◆ fix_super_read_only()

static bool fix_super_read_only ( sys_var ,
THD thd,
enum_var_type  type 
)
static

◆ fix_table_cache_size()

static bool fix_table_cache_size ( sys_var ,
THD ,
enum_var_type   
)
static

◆ fix_thd_charset()

static bool fix_thd_charset ( sys_var ,
THD thd,
enum_var_type  type 
)
static

◆ fix_thd_mem_root()

static bool fix_thd_mem_root ( sys_var self,
THD thd,
enum_var_type  type 
)
static

◆ fix_trans_mem_root()

static bool fix_trans_mem_root ( sys_var self,
THD thd,
enum_var_type  type 
)
static

◆ fixup_enforce_gtid_consistency_command_line()

const char * fixup_enforce_gtid_consistency_command_line ( char *  value_arg)

◆ handle_offline_mode()

static bool handle_offline_mode ( sys_var ,
THD thd,
enum_var_type   
)
static

◆ handle_plugin_lock_type_change()

static bool handle_plugin_lock_type_change ( sys_var ,
THD ,
enum_var_type   
)
static

Changes the Delegate internal state in regards to which type of lock to use and in regards to whether or not to take plugin locks in each hook invocation.

◆ is_error_gtid_mode_with_ignore_server_ids()

static bool is_error_gtid_mode_with_ignore_server_ids ( Gtid_mode::value_type  newmode)
static

This function shall return true if the new gtid mode is set to GTID_MODE_ON and there is at least one replication channel with IGNORE_SERVER_IDS configured (i.e., not empty).

The caller must have acquired a lock on the channel_map object before calling this function.

Parameters
newmodeThe new value for @global.gtid_mode.

◆ limit_parser_max_mem_size()

static bool limit_parser_max_mem_size ( sys_var ,
THD thd,
set_var var 
)
static

◆ modify_thread_cache_size()

static bool modify_thread_cache_size ( sys_var ,
THD ,
enum_var_type   
)
inlinestatic

Modify the thread size cache size.

◆ on_session_track_gtids_update()

static bool on_session_track_gtids_update ( sys_var ,
THD thd,
enum_var_type   
)
static

◆ optimizer_trace_update()

static bool optimizer_trace_update ( sys_var ,
THD thd,
enum_var_type   
)
static

Delete all old optimizer traces.

◆ partial_revokes_update()

static bool partial_revokes_update ( sys_var ,
THD ,
enum_var_type   
)
static

Set the updated global variable to the corresponding atomic system variable.

◆ performance_schema_show_processlist_update()

static bool performance_schema_show_processlist_update ( sys_var ,
THD thd,
enum_var_type   
)
static

Update the performance_schema_show_processlist.

Warn that the use of information_schema processlist is deprecated.

◆ pre_autocommit()

static bool pre_autocommit ( sys_var self,
THD thd,
set_var var 
)
static

Pre-update function to commit connection's active transactions when autocommit is enabled.

Note
This hook relies on the fact that it is called while not holding any locks. Breaking this assumption might result in deadlocks as commit acquires many different locks in its process (e.g. to open GTID-related tables).
Parameters
[in]selfA pointer to the sys_var, i.e. Sys_autocommit.
[in]thdA reference to THD object.
[in]varA pointer to the set_var created by the parser.
Return values
trueError during commit
falseOtherwise

◆ prevent_global_rbr_exec_mode_idempotent()

static bool prevent_global_rbr_exec_mode_idempotent ( sys_var self,
THD ,
set_var var 
)
static

◆ read_error_count()

static ulonglong read_error_count ( THD thd)
static

◆ read_insert_id()

static ulonglong read_insert_id ( THD thd)
static

◆ read_last_insert_id()

static ulonglong read_last_insert_id ( THD thd)
static

◆ read_rand_seed()

static ulonglong read_rand_seed ( THD )
static

◆ read_statement_id()

static ulonglong read_statement_id ( THD thd)
static

◆ read_timestamp()

static double read_timestamp ( THD thd)
static

◆ read_warning_count()

static ulonglong read_warning_count ( THD thd)
static

◆ replica_parallel_workers_update()

static bool replica_parallel_workers_update ( sys_var ,
THD thd,
enum_var_type   
)
static

◆ session_readonly()

static bool session_readonly ( sys_var self,
THD ,
set_var var 
)
static

◆ sql_mode_quoted_string_representation()

export bool sql_mode_quoted_string_representation ( THD thd,
sql_mode_t  sql_mode,
LEX_STRING ls 
)

◆ sql_mode_string_representation()

export bool sql_mode_string_representation ( THD thd,
sql_mode_t  sql_mode,
LEX_STRING ls 
)

◆ Sys_persisted_globals_load()

static Sys_var_bool Sys_persisted_globals_load ( PERSISTED_GLOBALS_LOAD  ,
"When this option is  enabled,
config file mysqld-auto.cnf is read " "and applied to  server,
else this file is ignored even if present."  ,
READ_ONLY NON_PERSIST   GLOBAL_VARpersisted_globals_load,
CMD_LINE(OPT_ARG ,
DEFAULT(true)  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(nullptr ,
ON_UPDATE(nullptr  
)
static

◆ sysvar_check_authid_string()

static bool sysvar_check_authid_string ( sys_var ,
THD thd,
set_var var 
)
static

◆ sysvar_update_mandatory_roles()

static bool sysvar_update_mandatory_roles ( sys_var ,
THD ,
enum_var_type   
)
static

◆ update_buffer_size()

static bool update_buffer_size ( THD ,
KEY_CACHE key_cache,
ptrdiff_t  offset,
ulonglong  new_value 
)
static

◆ update_cached_long_query_time()

static bool update_cached_long_query_time ( sys_var ,
THD thd,
enum_var_type  type 
)
static

◆ update_deprecated()

static bool update_deprecated ( sys_var self,
THD thd,
enum_var_type   
)
static

◆ update_deprecated_with_removal_message()

static bool update_deprecated_with_removal_message ( sys_var self,
THD thd,
enum_var_type   
)
static

◆ update_insert_id()

static bool update_insert_id ( THD thd,
set_var var 
)
static

◆ update_keycache_param()

static bool update_keycache_param ( THD ,
KEY_CACHE key_cache,
ptrdiff_t  offset,
ulonglong  new_value 
)
static

◆ update_last_insert_id()

static bool update_last_insert_id ( THD thd,
set_var var 
)
static

◆ update_log_error_verbosity()

static bool update_log_error_verbosity ( sys_var ,
THD ,
enum_var_type   
)
static

◆ update_log_throttle_queries_not_using_indexes()

static bool update_log_throttle_queries_not_using_indexes ( sys_var ,
THD thd,
enum_var_type   
)
static

◆ update_optimizer_switch()

void update_optimizer_switch ( )

◆ update_parser_max_mem_size()

void update_parser_max_mem_size ( )

◆ update_rand_seed1()

static bool update_rand_seed1 ( THD thd,
set_var var 
)
static

◆ update_rand_seed2()

static bool update_rand_seed2 ( THD thd,
set_var var 
)
static

◆ update_session_track_schema()

static bool update_session_track_schema ( sys_var ,
THD thd,
enum_var_type   
)
static

◆ update_session_track_state_change()

static bool update_session_track_state_change ( sys_var ,
THD thd,
enum_var_type   
)
static

◆ update_session_track_tx_info()

static bool update_session_track_tx_info ( sys_var ,
THD thd,
enum_var_type   
)
static

◆ update_timestamp()

static bool update_timestamp ( THD thd,
set_var var 
)
static

◆ update_track_session_sys_vars()

static bool update_track_session_sys_vars ( sys_var ,
THD thd,
enum_var_type  type 
)
static

Variable Documentation

◆ Binlog_checksum_enum

Sys_var_enum_binlog_checksum Binlog_checksum_enum("binlog_checksum", "Type of BINLOG_CHECKSUM_ALG. Include checksum for " "log events in the binary log. Possible values are NONE and CRC32; " "default is CRC32.", GLOBAL_VAR(binlog_checksum_options), CMD_LINE(REQUIRED_ARG), binlog_checksum_type_names, DEFAULT(mysql::binlog::event::BINLOG_CHECKSUM_ALG_CRC32), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_outside_trx)) ( "binlog_checksum"  ,
"Type of BINLOG_CHECKSUM_ALG. Include checksum for " "log events in the binary log. Possible values are NONE and CRC32; " "default is CRC32."  ,
GLOBAL_VAR(binlog_checksum_options ,
CMD_LINE(REQUIRED_ARG ,
binlog_checksum_type_names  ,
DEFAULT(mysql::binlog::event::BINLOG_CHECKSUM_ALG_CRC32 ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(check_outside_trx  
)
static

◆ binlog_row_image_names

const char* binlog_row_image_names[]
static
Initial value:
= {"MINIMAL", "NOBLOB", "FULL",
#define NullS
Definition of the null string (a null pointer of type char *), used in some of our string handling co...
Definition: nulls.h:33

◆ binlog_row_metadata_names

const char* binlog_row_metadata_names[] = {"MINIMAL", "FULL", NullS}
static

◆ binlog_row_value_options_names

const char* binlog_row_value_options_names[] = {"PARTIAL_JSON", nullptr}

◆ Binlog_transaction_dependency_history_size

Sys_var_ulong Binlog_transaction_dependency_history_size("binlog_transaction_dependency_history_size", "Maximum number of rows to keep in the writeset history.", ->m_opt_max_history_size) ( "binlog_transaction_dependency_history_size"  ,
"Maximum number of rows to keep in the writeset history."  ,
->  m_opt_max_history_size 
)
static

◆ BLOCK_SIZE

Sys_var_ulong BLOCK_SIZE(1) ( )

◆ bool_typelib

TYPELIB bool_typelib
Initial value:
nullptr}
static const char * bool_values[3]
Definition: sys_vars.h:167
#define array_elements(A)
Definition: validate_password_imp.cc:48

◆ charset_system_default

CHARSET_INFO* charset_system_default = &my_charset_utf8mb3_general_ci
static

◆ CMD_LINE

◆ completion_type_names

const char* completion_type_names[]
static
Initial value:
= {"NO_CHAIN", "CHAIN", "RELEASE",
nullptr}

◆ concurrent_insert_names

const char* concurrent_insert_names[]
static
Initial value:
= {"NEVER", "AUTO", "ALWAYS",
nullptr}

◆ CONNECT_TIMEOUT

constexpr const unsigned long CONNECT_TIMEOUT {10}
staticconstexpr

◆ DEFAULT

Sys_var_ulong DEFAULT(25000) ( 25000  )

◆ DEFAULT_ERROR_COUNT

constexpr const unsigned long DEFAULT_ERROR_COUNT {1024}
staticconstexpr

◆ DEFAULT_SORT_MEMORY

constexpr const unsigned long DEFAULT_SORT_MEMORY {256UL * 1024UL}
staticconstexpr

◆ delay_key_write_names

const char* delay_key_write_names[] = {"OFF", "ON", "ALL", NullS}
static

◆ DELAYED_LIMIT

constexpr const unsigned long DELAYED_LIMIT {100}
staticconstexpr

◆ DELAYED_QUEUE_SIZE

constexpr const unsigned long DELAYED_QUEUE_SIZE {1000}
staticconstexpr

◆ DELAYED_WAIT_TIMEOUT

constexpr const unsigned long DELAYED_WAIT_TIMEOUT {5 * 60}
staticconstexpr

◆ enforce_gtid_consistency_aliases

const Sys_var_multi_enum::ALIAS enforce_gtid_consistency_aliases[]
Initial value:
= {
{"OFF", 0}, {"ON", 1}, {"WARN", 2},
{"FALSE", 0}, {"TRUE", 1}, {nullptr, 0}}

◆ event_scheduler_names

const char* event_scheduler_names[] = {"OFF", "ON", "DISABLED", NullS}
static

◆ explain_format_names

const char* explain_format_names[]
static
Initial value:
= {
"TRADITIONAL", "TRADITIONAL_STRICT", "TREE", "JSON", NullS}

◆ glob_hostname_ptr

char* glob_hostname_ptr
static

◆ group_replication_consistency_names

const char* group_replication_consistency_names[]
static
Initial value:
= {
"EVENTUAL", "BEFORE_ON_PRIMARY_FAILOVER", "BEFORE",
"AFTER", "BEFORE_AND_AFTER", NullS}

◆ gtid_purged

Gtid_set* gtid_purged

◆ HOST_CACHE_SIZE

constexpr const unsigned HOST_CACHE_SIZE {128}
staticconstexpr

◆ internal_tmp_mem_storage_engine_names

const char* internal_tmp_mem_storage_engine_names[]
Initial value:
= {"MEMORY", "TempTable",
nullptr}

◆ license

char* license
static

◆ LOCK_authentication_policy

PolyLock_mutex PLock_authentication_policy& LOCK_authentication_policy
static

This is a mutex used to protect @global.authentication_policy variable.

◆ LOCK_default_password_lifetime

PolyLock_mutex Plock_default_password_lifetime & LOCK_default_password_lifetime
static

◆ LOCK_global_conn_mem_limit

PolyLock_mutex PLock_global_conn_mem_limit& LOCK_global_conn_mem_limit
static

◆ LOCK_keyring_operations

PolyLock_mutex PLock_keyring_operations& LOCK_keyring_operations
static

This is a mutex used to protect global variable @keyring_operations.

◆ LOCK_mandatory_roles

PolyLock_mutex PLock_sys_mandatory_roles& LOCK_mandatory_roles
static

◆ LOCK_partial_revokes

PolyLock_mutex Plock_partial_revokes& LOCK_partial_revokes
static

We also modify the global variable outside of sys_var structure.

Protect the global variable updates through this lock.

◆ LOCK_password_history

PolyLock_mutex plock_sys_password_history& LOCK_password_history
static

◆ LOCK_password_reuse_interval

PolyLock_mutex plock_sys_password_reuse_interval & LOCK_password_reuse_interval
static

◆ LOCK_prepared_stmt_count

PolyLock_mutex PLock_prepared_stmt_count& LOCK_prepared_stmt_count
static

◆ LOCK_replica_net_timeout

PolyLock_mutex PLock_replica_net_timeout& LOCK_replica_net_timeout
static

◆ LOCK_replica_trans_dep_tracker

PolyLock_mutex PLock_slave_trans_dep_tracker & LOCK_replica_trans_dep_tracker
static

◆ LOCK_sql_replica_skip_counter

PolyLock_mutex PLock_sql_replica_skip_counter & LOCK_sql_replica_skip_counter
static

◆ LOCK_sys_init_connect

PolyLock_rwlock PLock_sys_init_connect& LOCK_sys_init_connect
static

◆ LOCK_sys_init_replica

PolyLock_rwlock PLock_sys_init_replica& LOCK_sys_init_replica
static

◆ log_output_names

const char* log_output_names[] = {"NONE", "FILE", "TABLE", nullptr}
static

◆ max_mem_sz

constexpr size_t max_mem_sz = std::numeric_limits<size_t>::max()
constexpr

◆ mts_parallel_type_names

const char* mts_parallel_type_names[]
static
Initial value:
= {"DATABASE", "LOGICAL_CLOCK",
nullptr}

◆ MYSQLD_NET_RETRY_COUNT

constexpr const unsigned long MYSQLD_NET_RETRY_COUNT {10}
staticconstexpr

◆ NOT_IN_BINLOG

Sys_var_ulong NOT_IN_BINLOG

◆ num_prepared_stmt_limit

constexpr int num_prepared_stmt_limit = 4 * 1024 * 1024
staticconstexpr

◆ ON_CHECK

Sys_var_ulong ON_CHECK(nullptr) ( nullptr  )

◆ ON_UPDATE

Sys_var_ulong ON_UPDATE(nullptr)) ( nullptr  )

◆ OPTIMIZER_SWITCH_DEFAULT

constexpr const unsigned long long OPTIMIZER_SWITCH_DEFAULT
staticconstexpr
Initial value:
{
constexpr const uint64_t OPTIMIZER_SWITCH_DERIVED_MERGE
Definition: sql_const.h:216
constexpr const uint64_t OPTIMIZER_SWITCH_MRR
If this is off, MRR is never used.
Definition: sql_const.h:198
constexpr const uint64_t OPTIMIZER_SWITCH_HASH_SET_OPERATIONS
Definition: sql_const.h:225
constexpr const uint64_t OPTIMIZER_SWITCH_COND_FANOUT_FILTER
Definition: sql_const.h:215
constexpr const uint64_t OPTIMIZER_SWITCH_MRR_COST_BASED
If OPTIMIZER_SWITCH_MRR is on and this is on, MRR is used depending on a cost-based choice ("automati...
Definition: sql_const.h:205
constexpr const uint64_t OPTIMIZER_SWITCH_HASH_JOIN
Definition: sql_const.h:219
constexpr const uint64_t OPTIMIZER_SWITCH_INDEX_CONDITION_PUSHDOWN
Definition: sql_const.h:196
constexpr const uint64_t OPTIMIZER_SWITCH_DERIVED_CONDITION_PUSHDOWN
Definition: sql_const.h:223
constexpr const uint64_t OPTIMIZER_SWITCH_MATERIALIZATION
Definition: sql_const.h:208
constexpr const uint64_t OPTIMIZER_SWITCH_INDEX_MERGE_UNION
Definition: sql_const.h:192
constexpr const uint64_t OPTIMIZER_SWITCH_INDEX_MERGE_INTERSECT
Definition: sql_const.h:194
constexpr const uint64_t OPTIMIZER_SWITCH_INDEX_MERGE_SORT_UNION
Definition: sql_const.h:193
constexpr const uint64_t OPTIMIZER_SWITCH_LOOSE_SCAN
Definition: sql_const.h:210
constexpr const uint64_t OPTIMIZER_SWITCH_BNL
Definition: sql_const.h:206
constexpr const uint64_t OPTIMIZER_SWITCH_USE_INDEX_EXTENSIONS
Definition: sql_const.h:214
constexpr const uint64_t OPTIMIZER_SWITCH_PREFER_ORDERING_INDEX
Definition: sql_const.h:221
constexpr const uint64_t OPTIMIZER_SWITCH_ENGINE_CONDITION_PUSHDOWN
Definition: sql_const.h:195
constexpr const uint64_t OPTIMIZER_SWITCH_FIRSTMATCH
Definition: sql_const.h:211
constexpr const uint64_t OPTIMIZER_SWITCH_DUPSWEEDOUT
Definition: sql_const.h:212
constexpr const uint64_t OPTIMIZER_SWITCH_SEMIJOIN
Definition: sql_const.h:209
constexpr const uint64_t OPTIMIZER_SWITCH_INDEX_MERGE
@optimizer_switch flags.
Definition: sql_const.h:191
constexpr const uint64_t OPTIMIZER_SWITCH_SUBQ_MAT_COST_BASED
Definition: sql_const.h:213
constexpr const uint64_t OPTIMIZER_SKIP_SCAN
Definition: sql_const.h:218

◆ optimizer_switch_names

const char* optimizer_switch_names[]
static
Initial value:
= {
"index_merge",
"index_merge_union",
"index_merge_sort_union",
"index_merge_intersection",
"engine_condition_pushdown",
"index_condition_pushdown",
"mrr",
"mrr_cost_based",
"block_nested_loop",
"batched_key_access",
"materialization",
"semijoin",
"loosescan",
"firstmatch",
"duplicateweedout",
"subquery_materialization_cost_based",
"use_index_extensions",
"condition_fanout_filter",
"derived_merge",
"use_invisible_indexes",
"skip_scan",
"hash_join",
"subquery_to_derived",
"prefer_ordering_index",
"hypergraph_optimizer",
"derived_condition_pushdown",
"hash_set_operations",
"default",
Note
BEWARE! These must have the same order as the #defines in sql_const.h!

◆ PLock_slave_trans_dep_tracker

Sys_var_ulong & PLock_slave_trans_dep_tracker

◆ QUERY_ALLOC_BLOCK_SIZE

constexpr const unsigned long QUERY_ALLOC_BLOCK_SIZE {8192}
staticconstexpr

◆ QUERY_ALLOC_PREALLOC_SIZE

constexpr const unsigned long QUERY_ALLOC_PREALLOC_SIZE {8192}
staticconstexpr

◆ RANGE_ALLOC_BLOCK_SIZE

constexpr const unsigned long RANGE_ALLOC_BLOCK_SIZE {4096}
staticconstexpr

◆ rbr_exec_mode

Sys_var_enum rbr_exec_mode("rbr_exec_mode", "Modes for how row events should be executed. Legal values " "are STRICT (default) and IDEMPOTENT. In IDEMPOTENT mode, " "the server will not throw errors for operations that are idempotent. " "In STRICT mode, server will throw errors for the operations that " "cause a conflict.", SESSION_VAR(rbr_exec_mode_options), NO_CMD_LINE, rbr_exec_mode_names, DEFAULT(RBR_EXEC_MODE_STRICT), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(prevent_global_rbr_exec_mode_idempotent), ON_UPDATE(nullptr)) ( "rbr_exec_mode"  ,
"Modes for how row events should be executed. Legal values " "are STRICT (default) and IDEMPOTENT. In IDEMPOTENT  mode,
" "the server will not throw errors for operations that are idempotent. " "In STRICT  mode,
server will throw errors for the operations that " "cause a conflict."  ,
SESSION_VAR(rbr_exec_mode_options)  ,
NO_CMD_LINE  ,
rbr_exec_mode_names  ,
DEFAULT(RBR_EXEC_MODE_STRICT ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(prevent_global_rbr_exec_mode_idempotent ,
ON_UPDATE(nullptr  
)
static

◆ rbr_exec_mode_names

const char* rbr_exec_mode_names[] = {"STRICT", "IDEMPOTENT", nullptr}
static

◆ replica_exec_mode_names

const char* replica_exec_mode_names[]
static
Initial value:
= {"STRICT", "IDEMPOTENT",
nullptr}

◆ replica_type_conversions_name

const char* replica_type_conversions_name[]
Initial value:
= {
"ALL_LOSSY", "ALL_NON_LOSSY", "ALL_UNSIGNED", "ALL_SIGNED", nullptr}

◆ resultset_metadata_names

const char* resultset_metadata_names[] = {"NONE", "FULL", NullS}
static

◆ SCHEMA_DEF_CACHE_DEFAULT

constexpr const unsigned long SCHEMA_DEF_CACHE_DEFAULT {256}
staticconstexpr

◆ SCHEMA_DEF_CACHE_MIN

constexpr const unsigned long SCHEMA_DEF_CACHE_MIN {256}
staticconstexpr

◆ server_version_comment_ptr

char* server_version_comment_ptr
static

◆ server_version_compile_machine_ptr

char* server_version_compile_machine_ptr
static

◆ server_version_compile_os_ptr

char* server_version_compile_os_ptr
static

◆ server_version_compile_zlib_ptr

const char* server_version_compile_zlib_ptr = ZLIB_VERSION
static

◆ server_version_ptr

char* server_version_ptr
static

◆ session_track_gtids_names

const char* session_track_gtids_names[]
static
Initial value:
= {"OFF", "OWN_GTID",
"ALL_GTIDS", NullS}

◆ session_track_transaction_info_names

const char* session_track_transaction_info_names[]
static
Initial value:
= {
"OFF", "STATE", "CHARACTERISTICS", NullS}

◆ sql_mode_names

const char* sql_mode_names[]
static

◆ ssl_fips_mode_names

const char* ssl_fips_mode_names[] = {"OFF", "ON", "STRICT", nullptr}
static

◆ STORED_PROGRAM_DEF_CACHE_DEFAULT

constexpr const unsigned long STORED_PROGRAM_DEF_CACHE_DEFAULT {256}
staticconstexpr

◆ STORED_PROGRAM_DEF_CACHE_MIN

constexpr const unsigned long STORED_PROGRAM_DEF_CACHE_MIN {256}
staticconstexpr

◆ Sys_admin_addr

Sys_var_charptr Sys_admin_addr("admin_address", "IP address to bind to for service connection. Address can be an IPv4" " address, IPv6 address, or host name. Wildcard values *, ::, 0.0.0.0" " are not allowed. Address value can have following optional network" " namespace separated by the delimiter / from the address value." " E.g., the following value 192.168.1.1/red specifies IP addresses to" " listen for incoming TCP connections that have to be placed into" " the namespace 'red'. Using of network namespace requires its support" " from underlying Operating System. Attempt to specify a network namespace" " for a platform that doesn't support it results in error during socket" " creation.", READ_ONLY NON_PERSIST GLOBAL_VAR(my_admin_bind_addr_str), CMD_LINE(REQUIRED_ARG), IN_FS_CHARSET, DEFAULT(nullptr)) ( "admin_address"  ,
"IP address to bind to for service connection. Address can be an IPv4" "  address,
IPv6  address,
or host name. Wildcard values *  ,
::  ,
0.0.0.0" " are not allowed. Address value can have following optional network" " namespace separated by the delimiter/from the address value." " E.  g.,
the following value 192.168.1.1/red specifies IP addresses to" " listen for incoming TCP connections that have to be placed into" " the namespace 'red'. Using of network namespace requires its support" " from underlying Operating System. Attempt to specify a network namespace" " for a platform that doesn 't support it results in error during socket" " creation."  ,
READ_ONLY NON_PERSIST   GLOBAL_VARmy_admin_bind_addr_str,
CMD_LINE(REQUIRED_ARG ,
IN_FS_CHARSET  ,
DEFAULT(nullptr  
)
static

◆ Sys_admin_port

Sys_var_uint Sys_admin_port("admin_port", "Port number to use for service connection," " built-in default (" STRINGIFY_ARG(MYSQL_ADMIN_PORT) ")", READ_ONLY NON_PERSIST GLOBAL_VAR(mysqld_admin_port), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, 65535), DEFAULT(MYSQL_ADMIN_PORT), BLOCK_SIZE(1)) ( "admin_port"  ,
"Port number to use for service  connection,
" " built-in default(" STRINGIFY_ARG(MYSQL_ADMIN_PORT) ")"  ,
READ_ONLY NON_PERSIST   GLOBAL_VARmysqld_admin_port,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(0, 65535)  ,
DEFAULT(MYSQL_ADMIN_PORT ,
BLOCK_SIZE(1)   
)
static

◆ Sys_always_activate_granted_roles

Sys_var_bool Sys_always_activate_granted_roles("activate_all_roles_on_login", "Automatically set all granted roles as active after the user has " "authenticated successfully.", GLOBAL_VAR(opt_always_activate_granted_roles), CMD_LINE(OPT_ARG), DEFAULT(false), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(nullptr)) ( "activate_all_roles_on_login"  ,
"Automatically set all granted roles as active after the user has " "authenticated successfully."  ,
GLOBAL_VAR(opt_always_activate_granted_roles ,
CMD_LINE(OPT_ARG ,
DEFAULT(false)  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(nullptr ,
ON_UPDATE(nullptr  
)
static

◆ Sys_authentication_policy

Sys_var_charptr Sys_authentication_policy("authentication_policy", "Defines policies around how user account can be configured with Multi " "Factor authentication methods during CREATE/ALTER USER statement. " "This variable accepts at-most 3 comma separated list of authentication " "factor descriptions. Allowed factor descriptions are: " "(empty) - factor is optional, any authentication method is allowed. " "* - factor is mandatory, any authentication method is allowed. " "<plugin> - <plugin> is mandatory authentication method. " "*:<plugin> - factor is mandatory, <plugin> is default authentication " "method. The first factor cannot be optional and if neither mandatory nor " "default method is specified, caching_sha2_password is assumed as default.", GLOBAL_VAR(opt_authentication_policy), CMD_LINE(REQUIRED_ARG), IN_FS_CHARSET, DEFAULT("*,,"), &PLock_authentication_policy, NOT_IN_BINLOG, ON_CHECK(check_authentication_policy), ON_UPDATE(fix_authentication_policy)) ( "authentication_policy"  ,
"Defines policies around how user account can be configured with Multi " "Factor authentication methods during CREATE/ALTER USER statement. " "This variable accepts at-most 3 comma separated list of authentication " "factor descriptions. Allowed factor descriptions are: " "(empty) - factor is  optional,
any authentication method is allowed. " " *- factor is  mandatory,
any authentication method is allowed. " "< plugin > -< plugin > is mandatory authentication method. " " *:< plugin > - factor is  mandatory,
< plugin > is default authentication " "method. The first factor cannot be optional and if neither mandatory nor " "default method is  specified,
caching_sha2_password is assumed as default."  ,
GLOBAL_VAR(opt_authentication_policy ,
CMD_LINE(REQUIRED_ARG ,
IN_FS_CHARSET  ,
DEFAULT("*,,")  ,
PLock_authentication_policy,
NOT_IN_BINLOG  ,
ON_CHECK(check_authentication_policy ,
ON_UPDATE(fix_authentication_policy  
)
static

◆ Sys_auto_generate_certs

Sys_var_bool Sys_auto_generate_certs("auto_generate_certs", "Auto generate SSL certificates at server startup if " "none of the other SSL system variables are specified and " "certificate/key files are not present in data directory.", READ_ONLY NON_PERSIST GLOBAL_VAR(opt_auto_generate_certs), CMD_LINE(OPT_ARG), DEFAULT(true), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(nullptr), nullptr) ( "auto_generate_certs"  ,
"Auto generate SSL certificates at server startup if " "none of the other SSL system variables are specified and " "certificate/key files are not present in data directory."  ,
READ_ONLY NON_PERSIST   GLOBAL_VARopt_auto_generate_certs,
CMD_LINE(OPT_ARG ,
DEFAULT(true)  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(nullptr ,
ON_UPDATE(nullptr ,
nullptr   
)
static

◆ Sys_auto_increment_increment

Sys_var_ulong Sys_auto_increment_increment("auto_increment_increment", "Auto-increment columns are incremented by this", HINT_UPDATEABLE SESSION_VAR(auto_increment_increment), CMD_LINE(OPT_ARG), VALID_RANGE(1, 65535), DEFAULT(1), BLOCK_SIZE(1), NO_MUTEX_GUARD, IN_BINLOG) ( "auto_increment_increment"  ,
"Auto-increment columns are incremented by this"  ,
HINT_UPDATEABLE   SESSION_VARauto_increment_increment,
CMD_LINE(OPT_ARG ,
VALID_RANGE(1, 65535)  ,
DEFAULT(1)  ,
BLOCK_SIZE(1)  ,
NO_MUTEX_GUARD  ,
IN_BINLOG   
)
static

◆ Sys_auto_increment_offset

Sys_var_ulong Sys_auto_increment_offset("auto_increment_offset", "Offset added to Auto-increment columns. Used when " "auto-increment-increment != 1", HINT_UPDATEABLE SESSION_VAR(auto_increment_offset), CMD_LINE(OPT_ARG), VALID_RANGE(1, 65535), DEFAULT(1), BLOCK_SIZE(1), NO_MUTEX_GUARD, IN_BINLOG) ( "auto_increment_offset"  )
static

◆ Sys_auto_is_null

Sys_var_bit Sys_auto_is_null("sql_auto_is_null", "sql_auto_is_null", HINT_UPDATEABLE SESSION_VAR(option_bits), NO_CMD_LINE, OPTION_AUTO_IS_NULL, DEFAULT(false), NO_MUTEX_GUARD, IN_BINLOG) ( "sql_auto_is_null"  ,
"sql_auto_is_null"  ,
HINT_UPDATEABLE   SESSION_VARoption_bits,
NO_CMD_LINE  ,
OPTION_AUTO_IS_NULL  ,
DEFAULT(false)  ,
NO_MUTEX_GUARD  ,
IN_BINLOG   
)
static

◆ Sys_autocommit

Sys_var_bit Sys_autocommit("autocommit", "autocommit", SESSION_VAR(option_bits), NO_CMD_LINE, OPTION_AUTOCOMMIT, DEFAULT(true), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), PRE_UPDATE(pre_autocommit), ON_UPDATE(fix_autocommit)) ( "autocommit"  ,
"autocommit"  ,
SESSION_VAR(option_bits)  ,
NO_CMD_LINE  ,
OPTION_AUTOCOMMIT  ,
DEFAULT(true)  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(nullptr ,
PRE_UPDATE(pre_autocommit ,
ON_UPDATE(fix_autocommit  
)
static

◆ Sys_autocommit_ptr

export sys_var* Sys_autocommit_ptr = &Sys_autocommit

◆ Sys_automatic_sp_privileges

Sys_var_bool Sys_automatic_sp_privileges("automatic_sp_privileges", "Creating and dropping stored procedures alters ACLs", GLOBAL_VAR(sp_automatic_privileges), CMD_LINE(OPT_ARG), DEFAULT(true)) ( "automatic_sp_privileges"  ,
"Creating and dropping stored procedures alters ACLs"  ,
GLOBAL_VAR(sp_automatic_privileges ,
CMD_LINE(OPT_ARG ,
DEFAULT(true)   
)
static

◆ Sys_back_log

Sys_var_ulong Sys_back_log("back_log", "The number of outstanding connection requests " "MySQL can have. This comes into play when the main MySQL thread " "gets very many connection requests in a very short time", READ_ONLY GLOBAL_VAR(back_log), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, 65535), DEFAULT(0), BLOCK_SIZE(1)) ( "back_log"  ,
"The number of outstanding connection requests " "MySQL can have. This comes into play when the main MySQL thread " "gets very many connection requests in a very short time"  ,
READ_ONLY   GLOBAL_VARback_log,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(0, 65535)  ,
DEFAULT(0)  ,
BLOCK_SIZE(1)   
)
static

◆ Sys_basedir

Sys_var_charptr Sys_basedir("basedir", "Path to installation directory. All paths are " "usually resolved relative to this", READ_ONLY NON_PERSIST GLOBAL_VAR(mysql_home_ptr), CMD_LINE(REQUIRED_ARG, 'b'), IN_FS_CHARSET, DEFAULT(nullptr)) ( "basedir"  ,
"Path to installation directory. All paths are " "usually resolved relative to this"  ,
READ_ONLY NON_PERSIST   GLOBAL_VARmysql_home_ptr,
CMD_LINE(REQUIRED_ARG, 'b')  ,
IN_FS_CHARSET  ,
DEFAULT(nullptr  
)
static

◆ Sys_big_selects

Sys_var_bit Sys_big_selects("sql_big_selects", "sql_big_selects", HINT_UPDATEABLE SESSION_VAR(option_bits), NO_CMD_LINE, OPTION_BIG_SELECTS, DEFAULT(false)) ( "sql_big_selects"  ,
"sql_big_selects"  ,
HINT_UPDATEABLE   SESSION_VARoption_bits,
NO_CMD_LINE  ,
OPTION_BIG_SELECTS  ,
DEFAULT(false)   
)
static

◆ Sys_big_tables

Sys_var_bool Sys_big_tables("big_tables", "Allow big result sets by saving all " "temporary sets on file (Solves most 'table full' errors)", HINT_UPDATEABLE SESSION_VAR(big_tables), CMD_LINE(OPT_ARG), DEFAULT(false)) ( "big_tables"  ,
"Allow big result sets by saving all " "temporary sets on file (Solves most 'table full' errors)"  ,
HINT_UPDATEABLE   SESSION_VARbig_tables,
CMD_LINE(OPT_ARG ,
DEFAULT(false)   
)
static

◆ Sys_binlog_cache_size

Sys_var_ulong Sys_binlog_cache_size("binlog_cache_size", "The size of the transactional cache for " "updates to transactional engines for the binary log. " "If you often use transactions containing many statements, " "you can increase this to get more performance", GLOBAL_VAR(binlog_cache_size), CMD_LINE(REQUIRED_ARG), VALID_RANGE(IO_SIZE, ULONG_MAX), DEFAULT(32768), BLOCK_SIZE(IO_SIZE), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(fix_binlog_cache_size)) ( "binlog_cache_size"  ,
"The size of the transactional cache for " "updates to transactional engines for the binary log. " "If you often use transactions containing many  statements,
" "you can increase this to get more performance"  ,
GLOBAL_VAR(binlog_cache_size ,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(IO_SIZE, ULONG_MAX)  ,
DEFAULT(32768)  ,
BLOCK_SIZE(IO_SIZE ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(nullptr ,
ON_UPDATE(fix_binlog_cache_size  
)
static

◆ Sys_binlog_direct

Sys_var_bool Sys_binlog_direct("binlog_direct_non_transactional_updates", "Causes updates to non-transactional engines using statement format to " "be written directly to binary log, after executing them and before " "committing the transaction. Before using this option make sure " "that there are no dependencies between transactional and " "non-transactional tables such as in the statement INSERT INTO t_myisam " "SELECT * FROM t_innodb; otherwise, replicas may diverge.", SESSION_VAR(binlog_direct_non_trans_update), CMD_LINE(OPT_ARG), DEFAULT(false), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(binlog_direct_check)) ( "binlog_direct_non_transactional_updates"  ,
"Causes updates to non-transactional engines using statement format to " "be written directly to binary  log,
after executing them and before " "committing the transaction. Before using this option make sure " "that there are no dependencies between transactional and " "non-transactional tables such as in the statement INSERT INTO t_myisam " "SELECT *FROM t_innodb;  otherwise,
replicas may diverge."  ,
SESSION_VAR(binlog_direct_non_trans_update)  ,
CMD_LINE(OPT_ARG ,
DEFAULT(false)  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(binlog_direct_check  
)
static

◆ Sys_binlog_encryption

Sys_var_binlog_encryption Sys_binlog_encryption("binlog_encryption", "Enable/disable binary and relay logs encryption.", GLOBAL_VAR(rpl_encryption.get_enabled_var()), CMD_LINE(OPT_ARG), DEFAULT(false), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_binlog_encryption_admin)) ( "binlog_encryption"  ,
"Enable/disable binary and relay logs encryption."  ,
GLOBAL_VAR(rpl_encryption.get_enabled_var())  ,
CMD_LINE(OPT_ARG ,
DEFAULT(false)  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(check_binlog_encryption_admin  
)
static

◆ Sys_binlog_error_action

Sys_var_enum Sys_binlog_error_action("binlog_error_action", "When statements cannot be written to the binary log due to a fatal " "error, this option determines whether the server ignores the error and " "closes the binary log, or aborts.", GLOBAL_VAR(binlog_error_action), CMD_LINE(REQUIRED_ARG), binlog_error_action_list, DEFAULT(ABORT_SERVER)) ( "binlog_error_action"  ,
"When statements cannot be written to the binary log due to a fatal " "  error,
this option determines whether the server ignores the error and " "closes the binary  log,
or aborts."  ,
GLOBAL_VAR(binlog_error_action ,
CMD_LINE(REQUIRED_ARG ,
binlog_error_action_list  ,
DEFAULT(ABORT_SERVER  
)
static

◆ Sys_binlog_expire_logs_auto_purge

Sys_var_bool Sys_binlog_expire_logs_auto_purge("binlog_expire_logs_auto_purge", "Controls whether the server shall automatically purge binary log " "files or not. If this variable is set to FALSE then the server will " "not purge binary log files automatically.", GLOBAL_VAR(opt_binlog_expire_logs_auto_purge), CMD_LINE(OPT_ARG), DEFAULT(true)) ( "binlog_expire_logs_auto_purge"  ,
"Controls whether the server shall automatically purge binary log " "files or not. If this variable is set to FALSE then the server will " "not purge binary log files automatically."  ,
GLOBAL_VAR(opt_binlog_expire_logs_auto_purge ,
CMD_LINE(OPT_ARG ,
DEFAULT(true)   
)
static

◆ Sys_binlog_expire_logs_seconds

Sys_var_ulong Sys_binlog_expire_logs_seconds("binlog_expire_logs_seconds", "If non-zero, binary logs will be purged after binlog_expire_logs_seconds" " seconds; Purges happen at startup and at binary log rotation.", GLOBAL_VAR(binlog_expire_logs_seconds), CMD_LINE(REQUIRED_ARG, OPT_BINLOG_EXPIRE_LOGS_SECONDS), VALID_RANGE(0, 0xFFFFFFFF), DEFAULT(2592000), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(nullptr)) ( "binlog_expire_logs_seconds"  ,
"If non-  zero,
binary logs will be purged after binlog_expire_logs_seconds" " seconds;Purges happen at startup and at binary log rotation."  ,
GLOBAL_VAR(binlog_expire_logs_seconds ,
CMD_LINE(REQUIRED_ARG, OPT_BINLOG_EXPIRE_LOGS_SECONDS ,
VALID_RANGE(0, 0xFFFFFFFF)  ,
DEFAULT(2592000)  ,
BLOCK_SIZE(1)  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(nullptr ,
ON_UPDATE(nullptr  
)
static

◆ Sys_binlog_format

Sys_var_enum Sys_binlog_format("binlog_format", "The format used when writing the binary log. ROW writes each changed " "row in a binary format. STATEMENT writes SQL statements. MIXED writes " "SQL statements for most statements, and row format for statements that " "cannot be replayed in a deterministic manner using SQL. If NDBCLUSTER " "is enabled and binlog-format is MIXED, the format switches to row-based " "and back implicitly for each query accessing an NDBCLUSTER table." " This option is deprecated and will be removed in a future version.", SESSION_VAR(binlog_format), CMD_LINE(REQUIRED_ARG, OPT_BINLOG_FORMAT), binlog_format_names, DEFAULT(BINLOG_FORMAT_ROW), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(binlog_format_check), ON_UPDATE(fix_binlog_format_after_update), DEPRECATED_VAR("")) ( "binlog_format"  ,
"The format used when writing the binary log. ROW writes each changed " "row in a binary format. STATEMENT writes SQL statements. MIXED writes " "SQL statements for most  statements,
and row format for statements that " "cannot be replayed in a deterministic manner using SQL. If NDBCLUSTER " "is enabled and binlog-format is  MIXED,
the format switches to row-based " "and back implicitly for each query accessing an NDBCLUSTER table." " This option is deprecated and will be removed in a future version."  ,
SESSION_VAR(binlog_format)  ,
CMD_LINE(REQUIRED_ARG, OPT_BINLOG_FORMAT ,
binlog_format_names  ,
DEFAULT(BINLOG_FORMAT_ROW ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(binlog_format_check ,
ON_UPDATE(fix_binlog_format_after_update ,
DEPRECATED_VAR("")   
)
static

◆ Sys_binlog_group_commit_sync_delay

Sys_var_long Sys_binlog_group_commit_sync_delay("binlog_group_commit_sync_delay", "The number of microseconds the server waits for the " "binary log group commit sync queue to fill before " "continuing. Default: 0. Min: 0. Max: 1000000.", GLOBAL_VAR(opt_binlog_group_commit_sync_delay), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, 1000000), DEFAULT(0), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG) ( "binlog_group_commit_sync_delay"  ,
"The number of microseconds the server waits for the " "binary log group commit sync queue to fill before " "continuing. Default: 0. Min: 0. Max: 1000000."  ,
GLOBAL_VAR(opt_binlog_group_commit_sync_delay ,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(0, 1000000)  ,
DEFAULT(0)  ,
BLOCK_SIZE(1)  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG   
)
static

◆ Sys_binlog_group_commit_sync_no_delay_count

Sys_var_ulong Sys_binlog_group_commit_sync_no_delay_count("binlog_group_commit_sync_no_delay_count", "If there are this many transactions in the commit sync " "queue and the server is waiting for more transactions " "to be enqueued (as set using --binlog-group-commit-sync-delay), " "the commit procedure resumes.", GLOBAL_VAR(opt_binlog_group_commit_sync_no_delay_count), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, 100000), DEFAULT(0), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG) ( "binlog_group_commit_sync_no_delay_count"  ,
"If there are this many transactions in the commit sync " "queue and the server is waiting for more transactions " "to be enqueued   as set using --binlog-group-commit-sync-delay,
" "the commit procedure resumes."  ,
GLOBAL_VAR(opt_binlog_group_commit_sync_no_delay_count ,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(0, 100000)  ,
DEFAULT(0)  ,
BLOCK_SIZE(1)  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG   
)
static

◆ Sys_binlog_gtid_simple_recovery

Sys_var_bool Sys_binlog_gtid_simple_recovery("binlog_gtid_simple_recovery", "If this option is enabled, the server does not open more than " "two binary logs when initializing GTID_PURGED and " "GTID_EXECUTED, either during server restart or when binary " "logs are being purged. Enabling this option is useful when " "the server has already generated many binary logs without " "GTID events (e.g., having GTID_MODE = OFF). Note: If this " "option is enabled, GLOBAL.GTID_EXECUTED and " "GLOBAL.GTID_PURGED may be initialized wrongly in two cases: " "(1) All binary logs were generated by MySQL 5.7.5 or older, " "and GTID_MODE was ON for some binary logs but OFF for the " "newest binary log. (2) The oldest existing binary log was " "generated by MySQL 5.7.5 or older, and SET GTID_PURGED was " "issued after the oldest binary log was generated. If a wrong " "set is computed in one of case (1) or case (2), it will " "remain wrong even if the server is later restarted with this " "option disabled.", READ_ONLY GLOBAL_VAR(binlog_gtid_simple_recovery), CMD_LINE(OPT_ARG), DEFAULT(true)) ( "binlog_gtid_simple_recovery"  ,
"If this option is  enabled,
the server does not open more than " "two binary logs when initializing GTID_PURGED and " "  GTID_EXECUTED,
either during server restart or when binary " "logs are being purged. Enabling this option is useful when " "the server has already generated many binary logs without " "GTID events(e.g., having GTID_MODE=OFF). Note:If this " "option is  enabled,
GLOBAL.GTID_EXECUTED and " "GLOBAL.GTID_PURGED may be initialized wrongly in two cases:" "(1) All binary logs were generated by MySQL 5.7.5 or  older,
" "and GTID_MODE was ON for some binary logs but OFF for the " "newest binary log.(2) The oldest existing binary log was " "generated by MySQL 5.7.5 or  older,
and SET GTID_PURGED was " "issued after the oldest binary log was generated. If a wrong " "set is computed in one of   case1) or case(2,
it will " "remain wrong even if the server is later restarted with this " "option disabled."  ,
READ_ONLY   GLOBAL_VARbinlog_gtid_simple_recovery,
CMD_LINE(OPT_ARG ,
DEFAULT(true)   
)
static

◆ Sys_binlog_index

Sys_var_charptr Sys_binlog_index("log_bin_index", "File that holds the names for last binary log files.", READ_ONLY NON_PERSIST GLOBAL_VAR(log_bin_index), NO_CMD_LINE, IN_FS_CHARSET, DEFAULT(nullptr)) ( "log_bin_index"  ,
"File that holds the names for last binary log files."  ,
READ_ONLY NON_PERSIST   GLOBAL_VARlog_bin_index,
NO_CMD_LINE  ,
IN_FS_CHARSET  ,
DEFAULT(nullptr  
)
static

◆ Sys_binlog_max_flush_queue_time

Sys_var_int32 Sys_binlog_max_flush_queue_time("binlog_max_flush_queue_time", "The maximum time that the binary log group commit will keep reading" " transactions before it flush the transactions to the binary log (and" " optionally sync, depending on the value of sync_binlog).", GLOBAL_VAR(opt_binlog_max_flush_queue_time), CMD_LINE(REQUIRED_ARG, OPT_BINLOG_MAX_FLUSH_QUEUE_TIME), VALID_RANGE(0, 100000), DEFAULT(0), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(nullptr), DEPRECATED_VAR("")) ( "binlog_max_flush_queue_time"  ,
"The maximum time that the binary log group commit will keep reading" " transactions before it flush the transactions to the binary log (and" " optionally sync, depending on the value of sync_binlog)."  ,
GLOBAL_VAR(opt_binlog_max_flush_queue_time ,
CMD_LINE(REQUIRED_ARG, OPT_BINLOG_MAX_FLUSH_QUEUE_TIME ,
VALID_RANGE(0, 100000)  ,
DEFAULT(0)  ,
BLOCK_SIZE(1)  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(nullptr ,
ON_UPDATE(nullptr ,
DEPRECATED_VAR("")   
)
static

◆ Sys_binlog_order_commits

Sys_var_bool Sys_binlog_order_commits("binlog_order_commits", "Issue internal commit calls in the same order as transactions are" " written to the binary log. Default is to order commits.", GLOBAL_VAR(opt_binlog_order_commits), CMD_LINE(OPT_ARG), DEFAULT(true)) ( "binlog_order_commits"  ,
"Issue internal commit calls in the same order as transactions are" " written to the binary log. Default is to order commits."  ,
GLOBAL_VAR(opt_binlog_order_commits ,
CMD_LINE(OPT_ARG ,
DEFAULT(true)   
)
static

◆ Sys_binlog_rotate_encryption_master_key_at_startup

Sys_var_bool Sys_binlog_rotate_encryption_master_key_at_startup("binlog_rotate_encryption_master_key_at_startup", "Force binlog encryption master key rotation at startup", READ_ONLY GLOBAL_VAR( rpl_encryption.get_master_key_rotation_at_startup_var()), CMD_LINE(OPT_ARG), DEFAULT(false), NO_MUTEX_GUARD, NOT_IN_BINLOG) ( "binlog_rotate_encryption_master_key_at_startup"  ,
"Force binlog encryption master key rotation at startup"  ,
READ_ONLY   GLOBAL_VAR rpl_encryption.get_master_key_rotation_at_startup_var(),
CMD_LINE(OPT_ARG ,
DEFAULT(false)  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG   
)
static

◆ Sys_binlog_row_event_max_size

Sys_var_ulong Sys_binlog_row_event_max_size("binlog_row_event_max_size", "The maximum size of a row-based binary log event in bytes. Rows will be " "grouped into events smaller than this size if possible. " "The value has to be a multiple of 256.", READ_ONLY GLOBAL_VAR(binlog_row_event_max_size), CMD_LINE(REQUIRED_ARG), VALID_RANGE(256, ULONG_MAX), DEFAULT(8192), BLOCK_SIZE(256)) ( "binlog_row_event_max_size"  ,
"The maximum size of a row-based binary log event in bytes. Rows will be " "grouped into events smaller than this size if possible. " "The value has to be a multiple of 256."  ,
READ_ONLY   GLOBAL_VARbinlog_row_event_max_size,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(256, ULONG_MAX)  ,
DEFAULT(8192)  ,
BLOCK_SIZE(256)   
)
static

◆ Sys_binlog_row_image

Sys_var_enum Sys_binlog_row_image("binlog_row_image", "Controls whether rows should be logged in 'FULL', 'NOBLOB' or " "'MINIMAL' formats. 'FULL', means that all columns in the before " "and after image are logged. 'NOBLOB', means that mysqld avoids logging " "blob columns whenever possible (e.g. blob column was not changed or " "is not part of primary key). 'MINIMAL', means that a PK equivalent (PK " "columns or full row if there is no PK in the table) is logged in the " "before image, and only changed columns are logged in the after image. " "(Default: FULL).", SESSION_VAR(binlog_row_image), CMD_LINE(REQUIRED_ARG), binlog_row_image_names, DEFAULT(BINLOG_ROW_IMAGE_FULL), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_binlog_row_image), ON_UPDATE(nullptr)) ( "binlog_row_image"  ,
"Controls whether rows should be logged in 'FULL ,
'NOBLOB' or " " 'MINIMAL' formats. 'FULL ,
means that all columns in the before " "and after image are logged. 'NOBLOB'  ,
means that mysqld avoids logging " "blob columns whenever possible(e.g. blob column was not changed or " "is not part of primary key). 'MINIMAL'  ,
means that a PK equivalent(PK " "columns or full row if there is no PK in the table) is logged in the " "before  image,
and only changed columns are logged in the after image. " "(Default:FULL)."  ,
SESSION_VAR(binlog_row_image)  ,
CMD_LINE(REQUIRED_ARG ,
binlog_row_image_names  ,
DEFAULT(BINLOG_ROW_IMAGE_FULL ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(check_binlog_row_image ,
ON_UPDATE(nullptr  
)
static

◆ Sys_binlog_row_metadata

Sys_var_enum Sys_binlog_row_metadata("binlog_row_metadata", "Controls how much type information is written to the binary log when " "using ROW format. FULL causes all metadata to be logged. MINIMAL means " "that only metadata actually needed by replicas is logged.", GLOBAL_VAR(binlog_row_metadata), CMD_LINE(REQUIRED_ARG), binlog_row_metadata_names, DEFAULT(BINLOG_ROW_METADATA_MINIMAL), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(nullptr)) ( "binlog_row_metadata"  ,
"Controls how much type information is written to the binary log when " "using ROW format. FULL causes all metadata to be logged. MINIMAL means " "that only metadata actually needed by replicas is logged."  ,
GLOBAL_VAR(binlog_row_metadata ,
CMD_LINE(REQUIRED_ARG ,
binlog_row_metadata_names  ,
DEFAULT(BINLOG_ROW_METADATA_MINIMAL ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(nullptr ,
ON_UPDATE(nullptr  
)
static

◆ Sys_binlog_row_value_options

Sys_var_set Sys_binlog_row_value_options("binlog_row_value_options", "When set to PARTIAL_JSON, this option enables a space-efficient " "row-based binary log format for UPDATE statements that modify a " "JSON value using only the functions JSON_SET, JSON_REPLACE, and " "JSON_REMOVE. For such updates, only the modified parts of the " "JSON document are included in the binary log, so small changes of " "big documents may need significantly less space.", SESSION_VAR(binlog_row_value_options), CMD_LINE(REQUIRED_ARG), binlog_row_value_options_names, DEFAULT(0), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_binlog_row_value_options)) ( "binlog_row_value_options"  ,
"When set to  PARTIAL_JSON,
this option enables a space-efficient " "row-based binary log format for UPDATE statements that modify a " "JSON value using only the functions  JSON_SET,
JSON_REPLACE  ,
and " "JSON_REMOVE. For such  updates,
only the modified parts of the " "JSON document are included in the binary  log,
so small changes of " "big documents may need significantly less space."  ,
SESSION_VAR(binlog_row_value_options)  ,
CMD_LINE(REQUIRED_ARG ,
binlog_row_value_options_names  ,
DEFAULT(0)  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(check_binlog_row_value_options  
)
static

◆ Sys_binlog_rows_query

Sys_var_bool Sys_binlog_rows_query("binlog_rows_query_log_events", "Allow writing of Rows_query_log events into binary log.", SESSION_VAR(binlog_rows_query_log_events), CMD_LINE(OPT_ARG), DEFAULT(false), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_session_admin)) ( "binlog_rows_query_log_events"  ,
"Allow writing of Rows_query_log events into binary log."  ,
SESSION_VAR(binlog_rows_query_log_events)  ,
CMD_LINE(OPT_ARG ,
DEFAULT(false)  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(check_session_admin  
)
static

◆ Sys_binlog_stmt_cache_size

Sys_var_ulong Sys_binlog_stmt_cache_size("binlog_stmt_cache_size", "The size of the statement cache for " "updates to non-transactional engines for the binary log. " "If you often use statements updating a great number of rows, " "you can increase this to get more performance", GLOBAL_VAR(binlog_stmt_cache_size), CMD_LINE(REQUIRED_ARG), VALID_RANGE(IO_SIZE, ULONG_MAX), DEFAULT(32768), BLOCK_SIZE(IO_SIZE), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(fix_binlog_stmt_cache_size)) ( "binlog_stmt_cache_size"  ,
"The size of the statement cache for " "updates to non-transactional engines for the binary log. " "If you often use statements updating a great number of  rows,
" "you can increase this to get more performance"  ,
GLOBAL_VAR(binlog_stmt_cache_size ,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(IO_SIZE, ULONG_MAX)  ,
DEFAULT(32768)  ,
BLOCK_SIZE(IO_SIZE ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(nullptr ,
ON_UPDATE(fix_binlog_stmt_cache_size  
)
static

◆ Sys_binlog_transaction_compression_level_zstd

Sys_var_uint Sys_binlog_transaction_compression_level_zstd("binlog_transaction_compression_level_zstd", "Specifies the transaction compression level for ZSTD " "transaction compression in the binary log.", SESSION_VAR(binlog_trx_compression_level_zstd), CMD_LINE(REQUIRED_ARG), VALID_RANGE(1, 22), DEFAULT(mysql::binlog::event::compression::Zstd_comp:: default_compression_level), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_binlog_trx_compression), ON_UPDATE(nullptr)) ( "binlog_transaction_compression_level_zstd"  ,
"Specifies the transaction compression level for ZSTD " "transaction compression in the binary log."  ,
SESSION_VAR(binlog_trx_compression_level_zstd)  ,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(1, 22)  ,
DEFAULT(mysql::binlog::event::compression::Zstd_comp:: default_compression_level)  ,
BLOCK_SIZE(1)  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(check_binlog_trx_compression ,
ON_UPDATE(nullptr  
)
static

◆ Sys_binlog_trx_compression

Sys_var_bool Sys_binlog_trx_compression("binlog_transaction_compression", "Whether to compress transactions or not. Transactions are compressed " "using the ZSTD compression algorythm.", SESSION_VAR(binlog_trx_compression), CMD_LINE(OPT_ARG), DEFAULT(false), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_binlog_trx_compression)) ( "binlog_transaction_compression"  ,
"Whether to compress transactions or not. Transactions are compressed " "using the ZSTD compression algorythm."  ,
SESSION_VAR(binlog_trx_compression)  ,
CMD_LINE(OPT_ARG ,
DEFAULT(false)  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(check_binlog_trx_compression  
)
static

◆ Sys_block_encryption_mode

Sys_var_enum Sys_block_encryption_mode("block_encryption_mode", "mode for AES_ENCRYPT/AES_DECRYPT", SESSION_VAR(my_aes_mode), CMD_LINE(REQUIRED_ARG), my_aes_opmode_names, DEFAULT(my_aes_128_ecb)) ( "block_encryption_mode"  ,
"mode for AES_ENCRYPT/AES_DECRYPT"  ,
SESSION_VAR(my_aes_mode)  ,
CMD_LINE(REQUIRED_ARG ,
my_aes_opmode_names  ,
DEFAULT(my_aes_128_ecb  
)
static

◆ Sys_buffer_results

Sys_var_bit Sys_buffer_results("sql_buffer_result", "sql_buffer_result", HINT_UPDATEABLE SESSION_VAR(option_bits), NO_CMD_LINE, OPTION_BUFFER_RESULT, DEFAULT(false)) ( "sql_buffer_result"  ,
"sql_buffer_result"  ,
HINT_UPDATEABLE   SESSION_VARoption_bits,
NO_CMD_LINE  ,
OPTION_BUFFER_RESULT  ,
DEFAULT(false)   
)
static

◆ Sys_bulk_insert_buff_size

Sys_var_ulong Sys_bulk_insert_buff_size("bulk_insert_buffer_size", "Size of tree cache used in bulk " "insert optimisation. Note that this is a limit per thread!", HINT_UPDATEABLE SESSION_VAR(bulk_insert_buff_size), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, ULONG_MAX), DEFAULT(8192 *1024), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_session_admin)) ( "bulk_insert_buffer_size"  ,
"Size of tree cache used in bulk " "insert optimisation. Note that this is a limit per thread!"  ,
HINT_UPDATEABLE   SESSION_VARbulk_insert_buff_size,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(0, ULONG_MAX)  ,
DEFAULT(8192 *1024)  ,
BLOCK_SIZE(1)  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(check_session_admin  
)
static

◆ Sys_character_set_client

Sys_var_struct< CHARSET_INFO, Get_csname > Sys_character_set_client("character_set_client", "The character set for statements " "that arrive from the client", SESSION_VAR(character_set_client), NO_CMD_LINE, DEFAULT(&default_charset_info), NO_MUTEX_GUARD, IN_BINLOG, ON_CHECK(check_cs_client), ON_UPDATE(fix_thd_charset)) ( "character_set_client"  ,
"The character set for statements " "that arrive from the client"  ,
SESSION_VAR(character_set_client)  ,
NO_CMD_LINE  ,
DEFAULT &  default_charset_info,
NO_MUTEX_GUARD  ,
IN_BINLOG  ,
ON_CHECK(check_cs_client ,
ON_UPDATE(fix_thd_charset  
)
static

◆ Sys_character_set_connection

Sys_var_struct< CHARSET_INFO, Get_csname > Sys_character_set_connection("character_set_connection", "The character set used for " "literals that do not have a character set introducer and for " "number-to-string conversion", SESSION_VAR(collation_connection), NO_CMD_LINE, DEFAULT(&default_charset_info), NO_MUTEX_GUARD, IN_BINLOG, ON_CHECK(check_charset_not_null), ON_UPDATE(fix_thd_charset)) ( "character_set_connection"  ,
"The character set used for " "literals that do not have a character set introducer and for " "number-to-string conversion"  ,
SESSION_VAR(collation_connection)  ,
NO_CMD_LINE  ,
DEFAULT &  default_charset_info,
NO_MUTEX_GUARD  ,
IN_BINLOG  ,
ON_CHECK(check_charset_not_null ,
ON_UPDATE(fix_thd_charset  
)
static

◆ Sys_character_set_database

Sys_var_struct< CHARSET_INFO, Get_csname > Sys_character_set_database("character_set_database", " The character set used by the default database", SESSION_VAR(collation_database), NO_CMD_LINE, DEFAULT(&default_charset_info), NO_MUTEX_GUARD, IN_BINLOG, ON_CHECK(check_charset_db), ON_UPDATE(update_deprecated)) ( "character_set_database"  ,
" The character set used by the default database"  ,
SESSION_VAR(collation_database)  ,
NO_CMD_LINE  ,
DEFAULT &  default_charset_info,
NO_MUTEX_GUARD  ,
IN_BINLOG  ,
ON_CHECK(check_charset_db ,
ON_UPDATE(update_deprecated  
)
static

◆ Sys_character_set_filesystem

Sys_var_struct< CHARSET_INFO, Get_csname > Sys_character_set_filesystem("character_set_filesystem", "The filesystem character set", SESSION_VAR(character_set_filesystem), NO_CMD_LINE, DEFAULT(&character_set_filesystem), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_cs_filesystem), ON_UPDATE(fix_thd_charset)) ( "character_set_filesystem"  ,
"The filesystem character set"  ,
SESSION_VAR(character_set_filesystem ,
NO_CMD_LINE  ,
DEFAULT &  character_set_filesystem,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(check_cs_filesystem ,
ON_UPDATE(fix_thd_charset  
)
static

◆ Sys_character_set_results

Sys_var_struct< CHARSET_INFO, Get_csname > Sys_character_set_results("character_set_results", "The character set used for returning " "query results to the client", SESSION_VAR(character_set_results), NO_CMD_LINE, DEFAULT(&default_charset_info), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_charset)) ( "character_set_results"  ,
"The character set used for returning " "query results to the client"  ,
SESSION_VAR(character_set_results)  ,
NO_CMD_LINE  ,
DEFAULT &  default_charset_info,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(check_charset  
)
static

◆ Sys_character_set_server

Sys_var_struct< CHARSET_INFO, Get_csname > Sys_character_set_server("character_set_server", "The default character set", PERSIST_AS_READONLY SESSION_VAR(collation_server), NO_CMD_LINE, DEFAULT(&default_charset_info), NO_MUTEX_GUARD, IN_BINLOG, ON_CHECK(check_charset_not_null)) ( "character_set_server"  ,
"The default character set"  ,
PERSIST_AS_READONLY   SESSION_VARcollation_server,
NO_CMD_LINE  ,
DEFAULT &  default_charset_info,
NO_MUTEX_GUARD  ,
IN_BINLOG  ,
ON_CHECK(check_charset_not_null  
)
static

◆ Sys_character_set_system

Sys_var_struct< CHARSET_INFO, Get_csname > Sys_character_set_system("character_set_system", "The character set used by the server " "for storing identifiers", READ_ONLY NON_PERSIST GLOBAL_VAR(system_charset_info), NO_CMD_LINE, DEFAULT(&charset_system_default)) ( "character_set_system"  ,
"The character set used by the server " "for storing identifiers"  ,
READ_ONLY NON_PERSIST   GLOBAL_VARsystem_charset_info,
NO_CMD_LINE  ,
DEFAULT &  charset_system_default 
)
static

◆ Sys_character_sets_dir

Sys_var_charptr Sys_character_sets_dir("character_sets_dir", "Directory where character sets are", READ_ONLY NON_PERSIST GLOBAL_VAR(charsets_dir), CMD_LINE(REQUIRED_ARG), IN_FS_CHARSET, DEFAULT(nullptr)) ( "character_sets_dir"  ,
"Directory where character sets are"  ,
READ_ONLY NON_PERSIST   GLOBAL_VARcharsets_dir,
CMD_LINE(REQUIRED_ARG ,
IN_FS_CHARSET  ,
DEFAULT(nullptr  
)
static

◆ Sys_check_proxy_users

Sys_var_bool Sys_check_proxy_users("check_proxy_users", "If set to FALSE (the default), then proxy user identity will not be " "mapped for authentication plugins which support mapping from grant " "tables. When set to TRUE, users associated with authentication " "plugins which signal proxy user mapping should be done according to " "GRANT PROXY privilege definition.", GLOBAL_VAR(check_proxy_users), CMD_LINE(OPT_ARG), DEFAULT(false)) ( "check_proxy_users"  ,
"If set to FALSE   the default,
then proxy user identity will not be " "mapped for authentication plugins which support mapping from grant " "tables. When set to  TRUE,
users associated with authentication " "plugins which signal proxy user mapping should be done according to " "GRANT PROXY privilege definition."  ,
GLOBAL_VAR(check_proxy_users ,
CMD_LINE(OPT_ARG ,
DEFAULT(false)   
)
static

◆ Sys_collation_connection

Sys_var_struct< CHARSET_INFO, Get_name > Sys_collation_connection("collation_connection", "The collation of the connection " "character set", SESSION_VAR(collation_connection), NO_CMD_LINE, DEFAULT(&default_charset_info), NO_MUTEX_GUARD, IN_BINLOG, ON_CHECK(check_collation_not_null), ON_UPDATE(fix_thd_charset)) ( "collation_connection"  ,
"The collation of the connection " "character set"  ,
SESSION_VAR(collation_connection)  ,
NO_CMD_LINE  ,
DEFAULT &  default_charset_info,
NO_MUTEX_GUARD  ,
IN_BINLOG  ,
ON_CHECK(check_collation_not_null ,
ON_UPDATE(fix_thd_charset  
)
static

◆ Sys_collation_database

Sys_var_struct< CHARSET_INFO, Get_name > Sys_collation_database("collation_database", "The collation of the database " "character set", SESSION_VAR(collation_database), NO_CMD_LINE, DEFAULT(&default_charset_info), NO_MUTEX_GUARD, IN_BINLOG, ON_CHECK(check_collation_db), ON_UPDATE(update_deprecated)) ( "collation_database"  ,
"The collation of the database " "character set"  ,
SESSION_VAR(collation_database)  ,
NO_CMD_LINE  ,
DEFAULT &  default_charset_info,
NO_MUTEX_GUARD  ,
IN_BINLOG  ,
ON_CHECK(check_collation_db ,
ON_UPDATE(update_deprecated  
)
static

◆ Sys_collation_server

Sys_var_struct< CHARSET_INFO, Get_name > Sys_collation_server("collation_server", "The server default collation", SESSION_VAR(collation_server), NO_CMD_LINE, DEFAULT(&default_charset_info), NO_MUTEX_GUARD, IN_BINLOG, ON_CHECK(check_collation_not_null)) ( "collation_server"  ,
"The server default collation"  ,
SESSION_VAR(collation_server)  ,
NO_CMD_LINE  ,
DEFAULT &  default_charset_info,
NO_MUTEX_GUARD  ,
IN_BINLOG  ,
ON_CHECK(check_collation_not_null  
)
static

◆ Sys_completion_type

Sys_var_enum Sys_completion_type("completion_type", "The transaction completion type, one of " "NO_CHAIN, CHAIN, RELEASE", SESSION_VAR(completion_type), CMD_LINE(REQUIRED_ARG), completion_type_names, DEFAULT(0)) ( "completion_type"  ,
"The transaction completion  type,
one of " "  NO_CHAIN,
CHAIN  ,
RELEASE"  ,
SESSION_VAR(completion_type)  ,
CMD_LINE(REQUIRED_ARG ,
completion_type_names  ,
DEFAULT(0)   
)
static

◆ Sys_concurrent_insert

Sys_var_enum Sys_concurrent_insert("concurrent_insert", "Use concurrent insert with MyISAM. Possible " "values are NEVER, AUTO, ALWAYS", GLOBAL_VAR(myisam_concurrent_insert), CMD_LINE(OPT_ARG), concurrent_insert_names, DEFAULT(1)) ( "concurrent_insert"  ,
"Use concurrent insert with MyISAM. Possible " "values are  NEVER,
AUTO  ,
ALWAYS"  ,
GLOBAL_VAR(myisam_concurrent_insert ,
CMD_LINE(OPT_ARG ,
concurrent_insert_names  ,
DEFAULT(1)   
)
static

◆ Sys_connect_timeout

Sys_var_ulong Sys_connect_timeout("connect_timeout", "The number of seconds the mysqld server is waiting for a connect " "packet before responding with 'Bad handshake'", GLOBAL_VAR(connect_timeout), CMD_LINE(REQUIRED_ARG), VALID_RANGE(2, LONG_TIMEOUT), DEFAULT(CONNECT_TIMEOUT), BLOCK_SIZE(1)) ( "connect_timeout"  ,
"The number of seconds the mysqld server is waiting for a connect " "packet before responding with 'Bad handshake'"  ,
GLOBAL_VAR(connect_timeout ,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(2, LONG_TIMEOUT ,
DEFAULT(CONNECT_TIMEOUT ,
BLOCK_SIZE(1)   
)
static

◆ Sys_connection_global_memory_tracking

Sys_var_bool Sys_connection_global_memory_tracking("global_connection_memory_tracking", "Enable updating the global memory counter and checking " "the global connection memory limit exceeding", SESSION_VAR(conn_global_mem_tracking), CMD_LINE(OPT_ARG), DEFAULT(false), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_session_admin), ON_UPDATE(nullptr)) ( "global_connection_memory_tracking"  ,
"Enable updating the global memory counter and checking " "the global connection memory limit exceeding"  ,
SESSION_VAR(conn_global_mem_tracking)  ,
CMD_LINE(OPT_ARG ,
DEFAULT(false)  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(check_session_admin ,
ON_UPDATE(nullptr  
)
static

◆ Sys_connection_memory_chunk_size

Sys_var_ulong Sys_connection_memory_chunk_size("connection_memory_chunk_size", "Chunk size regulating frequency of updating the global memory counter", SESSION_VAR(conn_mem_chunk_size), CMD_LINE(REQUIRED_ARG), VALID_RANGE(1, 1024 *1024 *512), DEFAULT(8192), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_session_admin), ON_UPDATE(nullptr)) ( "connection_memory_chunk_size"  ,
"Chunk size regulating frequency of updating the global memory counter ,
SESSION_VAR(conn_mem_chunk_size)  ,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(1, 1024 *1024 *512)  ,
DEFAULT(8192)  ,
BLOCK_SIZE(1)  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(check_session_admin ,
ON_UPDATE(nullptr  
)
static

◆ Sys_connection_memory_limit

Sys_var_ulonglong Sys_connection_memory_limit("connection_memory_limit", "Maximum amount of memory connection can consume", SESSION_VAR(conn_mem_limit), CMD_LINE(REQUIRED_ARG), VALID_RANGE(1, max_mem_sz), DEFAULT(max_mem_sz), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_session_admin), ON_UPDATE(nullptr)) ( "connection_memory_limit"  ,
"Maximum amount of memory connection can consume"  ,
SESSION_VAR(conn_mem_limit)  ,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(1, max_mem_sz ,
DEFAULT(max_mem_sz ,
BLOCK_SIZE(1)  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(check_session_admin ,
ON_UPDATE(nullptr  
)
static

◆ Sys_core_file

Sys_var_test_flag Sys_core_file("core_file", "write a core-file on crashes", TEST_CORE_ON_SIGNAL) ( "core_file"  ,
"write a core-file on crashes"  ,
TEST_CORE_ON_SIGNAL   
)
static

◆ Sys_cte_max_recursion_depth

Sys_var_uint Sys_cte_max_recursion_depth("cte_max_recursion_depth", "Abort a recursive common table expression " "if it does more than this number of iterations.", HINT_UPDATEABLE SESSION_VAR(cte_max_recursion_depth), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, UINT_MAX32), DEFAULT(1000), BLOCK_SIZE(1)) ( "cte_max_recursion_depth"  ,
"Abort a recursive common table expression " "if it does more than this number of iterations."  ,
HINT_UPDATEABLE   SESSION_VARcte_max_recursion_depth,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(0, UINT_MAX32 ,
DEFAULT(1000)  ,
BLOCK_SIZE(1)   
)
static

◆ Sys_datadir

Sys_var_charptr Sys_datadir("datadir", "Path to the database root directory", READ_ONLY NON_PERSIST GLOBAL_VAR(mysql_real_data_home_ptr), CMD_LINE(REQUIRED_ARG, 'h'), IN_FS_CHARSET, DEFAULT(mysql_real_data_home)) ( "datadir"  ,
"Path to the database root directory"  ,
READ_ONLY NON_PERSIST   GLOBAL_VARmysql_real_data_home_ptr,
CMD_LINE(REQUIRED_ARG, 'h')  ,
IN_FS_CHARSET  ,
DEFAULT(mysql_real_data_home  
)
static

◆ Sys_dbug

Sys_var_dbug Sys_dbug("debug", "Debug log", sys_var::SESSION, CMD_LINE(OPT_ARG, '#'), DEFAULT(""), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_session_admin)) ( "debug"  ,
"Debug log"  ,
sys_var::SESSION  ,
CMD_LINE(OPT_ARG, '#')  ,
DEFAULT("")  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(check_session_admin  
)
static

◆ Sys_debug_sensitive_session_string

Sys_var_charptr Sys_debug_sensitive_session_string("debug_sensitive_session_string", "Debug variable to test sensitive session string variable.", SENSITIVE SESSION_VAR(debug_sensitive_session_str), CMD_LINE(REQUIRED_ARG), IN_FS_CHARSET, DEFAULT("")) ( "debug_sensitive_session_string"  ,
"Debug variable to test sensitive session string variable."  ,
SENSITIVE   SESSION_VARdebug_sensitive_session_str,
CMD_LINE(REQUIRED_ARG ,
IN_FS_CHARSET  ,
DEFAULT("")   
)
static

◆ Sys_debug_set_operations_secondary_overflow_at

Sys_var_charptr Sys_debug_set_operations_secondary_overflow_at("debug_set_operations_secondary_overflow_at", "Error injection", HINT_UPDATEABLE SESSION_VAR(debug_set_operations_secondary_overflow_at), CMD_LINE(REQUIRED_ARG), IN_FS_CHARSET, DEFAULT(""), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(nullptr)) ( "debug_set_operations_secondary_overflow_at"  ,
"Error injection"  ,
HINT_UPDATEABLE   SESSION_VARdebug_set_operations_secondary_overflow_at,
CMD_LINE(REQUIRED_ARG ,
IN_FS_CHARSET  ,
DEFAULT("")  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(nullptr ,
ON_UPDATE(nullptr  
)
static

◆ Sys_default_collation_for_utf8mb4

Sys_var_struct< CHARSET_INFO, Get_name > Sys_default_collation_for_utf8mb4("default_collation_for_utf8mb4", "Controls default collation for utf8mb4 while replicating implicit " "utf8mb4 collations.", SESSION_VAR(default_collation_for_utf8mb4), NO_CMD_LINE, DEFAULT(&my_charset_utf8mb4_0900_ai_ci), NO_MUTEX_GUARD, IN_BINLOG, ON_CHECK(check_default_collation_for_utf8mb4), ON_UPDATE(update_deprecated)) ( "default_collation_for_utf8mb4"  ,
"Controls default collation for utf8mb4 while replicating implicit " "utf8mb4 collations."  ,
SESSION_VAR(default_collation_for_utf8mb4)  ,
NO_CMD_LINE  ,
DEFAULT &  my_charset_utf8mb4_0900_ai_ci,
NO_MUTEX_GUARD  ,
IN_BINLOG  ,
ON_CHECK(check_default_collation_for_utf8mb4 ,
ON_UPDATE(update_deprecated  
)
static

◆ Sys_default_password_lifetime

Sys_var_uint Sys_default_password_lifetime("default_password_lifetime", "The number of days after which the " "password will expire.", GLOBAL_VAR(default_password_lifetime), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, UINT_MAX16), DEFAULT(0), BLOCK_SIZE(1), &Plock_default_password_lifetime) ( "default_password_lifetime"  ,
"The number of days after which the " "password will expire."  ,
GLOBAL_VAR(default_password_lifetime ,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(0, UINT_MAX16 ,
DEFAULT(0)  ,
BLOCK_SIZE(1)  ,
Plock_default_password_lifetime 
)
static

◆ Sys_default_storage_engine

Sys_var_plugin Sys_default_storage_engine("default_storage_engine", "The default storage engine for new tables", SESSION_VAR(table_plugin), NO_CMD_LINE, MYSQL_STORAGE_ENGINE_PLUGIN, DEFAULT(&default_storage_engine), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_storage_engine)) ( "default_storage_engine"  ,
"The default storage engine for new tables"  ,
SESSION_VAR(table_plugin)  ,
NO_CMD_LINE  ,
MYSQL_STORAGE_ENGINE_PLUGIN  ,
DEFAULT &  default_storage_engine,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(check_storage_engine  
)
static

◆ Sys_default_table_encryption

Sys_var_bool Sys_default_table_encryption("default_table_encryption", "Database and tablespace are created with this default encryption property " "unless the user specifies an explicit encryption property.", HINT_UPDATEABLE SESSION_VAR(default_table_encryption), CMD_LINE(OPT_ARG), DEFAULT(false), NO_MUTEX_GUARD, IN_BINLOG, ON_CHECK(check_set_default_table_encryption_access), ON_UPDATE(nullptr)) ( "default_table_encryption"  ,
"Database and tablespace are created with this default encryption property " "unless the user specifies an explicit encryption property."  ,
HINT_UPDATEABLE   SESSION_VARdefault_table_encryption,
CMD_LINE(OPT_ARG ,
DEFAULT(false)  ,
NO_MUTEX_GUARD  ,
IN_BINLOG  ,
ON_CHECK(check_set_default_table_encryption_access ,
ON_UPDATE(nullptr  
)
static

◆ Sys_default_tmp_storage_engine

Sys_var_plugin Sys_default_tmp_storage_engine("default_tmp_storage_engine", "The default storage engine for new explicit temporary tables", HINT_UPDATEABLE SESSION_VAR(temp_table_plugin), NO_CMD_LINE, MYSQL_STORAGE_ENGINE_PLUGIN, DEFAULT(&default_tmp_storage_engine), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_storage_engine)) ( "default_tmp_storage_engine"  ,
"The default storage engine for new explicit temporary tables"  ,
HINT_UPDATEABLE   SESSION_VARtemp_table_plugin,
NO_CMD_LINE  ,
MYSQL_STORAGE_ENGINE_PLUGIN  ,
DEFAULT &  default_tmp_storage_engine,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(check_storage_engine  
)
static

◆ Sys_default_week_format

Sys_var_ulong Sys_default_week_format("default_week_format", "The default week format used by WEEK() functions", SESSION_VAR(default_week_format), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, 7), DEFAULT(0), BLOCK_SIZE(1)) ( "default_week_format"  ,
"The default week format used by WEEK() functions"  ,
SESSION_VAR(default_week_format)  ,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(0, 7)  ,
DEFAULT(0)  ,
BLOCK_SIZE(1)   
)
static

◆ Sys_delay_key_write

Sys_var_enum Sys_delay_key_write("delay_key_write", "Type of DELAY_KEY_WRITE", GLOBAL_VAR(delay_key_write_options), CMD_LINE(OPT_ARG), delay_key_write_names, DEFAULT(DELAY_KEY_WRITE_ON), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(fix_delay_key_write)) ( "delay_key_write"  ,
"Type of DELAY_KEY_WRITE"  ,
GLOBAL_VAR(delay_key_write_options ,
CMD_LINE(OPT_ARG ,
delay_key_write_names  ,
DEFAULT(DELAY_KEY_WRITE_ON ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(nullptr ,
ON_UPDATE(fix_delay_key_write  
)
static

◆ Sys_delayed_insert_limit

Sys_var_ulong Sys_delayed_insert_limit("delayed_insert_limit", "After inserting delayed_insert_limit rows, the INSERT DELAYED " "handler will check if there are any SELECT statements pending. " "If so, it allows these to execute before continuing. " "This variable is deprecated along with INSERT DELAYED.", GLOBAL_VAR(delayed_insert_limit), CMD_LINE(REQUIRED_ARG), VALID_RANGE(1, ULONG_MAX), DEFAULT(DELAYED_LIMIT), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(nullptr), DEPRECATED_VAR("")) ( "delayed_insert_limit"  ,
"After inserting delayed_insert_limit  rows,
the INSERT DELAYED " "handler will check if there are any SELECT statements pending. " "If  so,
it allows these to execute before continuing. " "This variable is deprecated along with INSERT DELAYED."  ,
GLOBAL_VAR(delayed_insert_limit ,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(1, ULONG_MAX)  ,
DEFAULT(DELAYED_LIMIT ,
BLOCK_SIZE(1)  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(nullptr ,
ON_UPDATE(nullptr ,
DEPRECATED_VAR("")   
)
static

◆ Sys_delayed_insert_timeout

Sys_var_ulong Sys_delayed_insert_timeout("delayed_insert_timeout", "How long a INSERT DELAYED thread should wait for INSERT statements " "before terminating. " "This variable is deprecated along with INSERT DELAYED.", GLOBAL_VAR(delayed_insert_timeout), CMD_LINE(REQUIRED_ARG), VALID_RANGE(1, LONG_TIMEOUT), DEFAULT(DELAYED_WAIT_TIMEOUT), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(nullptr), DEPRECATED_VAR("")) ( "delayed_insert_timeout"  ,
"How long a INSERT DELAYED thread should wait for INSERT statements " "before terminating. " "This variable is deprecated along with INSERT DELAYED."  ,
GLOBAL_VAR(delayed_insert_timeout ,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(1, LONG_TIMEOUT ,
DEFAULT(DELAYED_WAIT_TIMEOUT ,
BLOCK_SIZE(1)  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(nullptr ,
ON_UPDATE(nullptr ,
DEPRECATED_VAR("")   
)
static

◆ Sys_delayed_queue_size

Sys_var_ulong Sys_delayed_queue_size("delayed_queue_size", "What size queue (in rows) should be allocated for handling INSERT " "DELAYED. If the queue becomes full, any client that does INSERT " "DELAYED will wait until there is room in the queue again. " "This variable is deprecated along with INSERT DELAYED.", GLOBAL_VAR(delayed_queue_size), CMD_LINE(REQUIRED_ARG), VALID_RANGE(1, ULONG_MAX), DEFAULT(DELAYED_QUEUE_SIZE), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(nullptr), DEPRECATED_VAR("")) ( "delayed_queue_size"  ,
"What size queue (in rows) should be allocated for handling INSERT " "DELAYED. If the queue becomes  full,
any client that does INSERT " "DELAYED will wait until there is room in the queue again. " "This variable is deprecated along with INSERT DELAYED."  ,
GLOBAL_VAR(delayed_queue_size ,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(1, ULONG_MAX)  ,
DEFAULT(DELAYED_QUEUE_SIZE ,
BLOCK_SIZE(1)  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(nullptr ,
ON_UPDATE(nullptr ,
DEPRECATED_VAR("")   
)
static

◆ Sys_disabled_storage_engines

Sys_var_charptr Sys_disabled_storage_engines("disabled_storage_engines", "Limit CREATE TABLE for the storage engines listed", READ_ONLY GLOBAL_VAR(opt_disabled_storage_engines), CMD_LINE(REQUIRED_ARG), IN_SYSTEM_CHARSET, DEFAULT("")) ( "disabled_storage_engines"  ,
"Limit CREATE TABLE for the storage engines listed"  ,
READ_ONLY   GLOBAL_VARopt_disabled_storage_engines,
CMD_LINE(REQUIRED_ARG ,
IN_SYSTEM_CHARSET  ,
DEFAULT("")   
)
static

◆ Sys_disconnect_on_expired_password

Sys_var_bool Sys_disconnect_on_expired_password("disconnect_on_expired_password", "Give clients that don't signal password expiration support execution " "time " "error(s) instead of connection error", READ_ONLY GLOBAL_VAR(disconnect_on_expired_password), CMD_LINE(OPT_ARG), DEFAULT(true)) ( "disconnect_on_expired_password"  ,
"Give clients that don't signal password expiration support execution " "time " "error(s) instead of connection error"  ,
READ_ONLY   GLOBAL_VARdisconnect_on_expired_password,
CMD_LINE(OPT_ARG ,
DEFAULT(true)   
)
static

◆ Sys_div_precincrement

Sys_var_ulong Sys_div_precincrement("div_precision_increment", "Precision of the result of '/' " "operator will be increased on that value", HINT_UPDATEABLE SESSION_VAR(div_precincrement), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, DECIMAL_MAX_SCALE), DEFAULT(4), BLOCK_SIZE(1)) ( "div_precision_increment"  ,
"Precision of the result of '/' " "operator will be increased on that value"  ,
HINT_UPDATEABLE   SESSION_VARdiv_precincrement,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(0, DECIMAL_MAX_SCALE ,
DEFAULT(4)  ,
BLOCK_SIZE(1)   
)
static

◆ Sys_enforce_gtid_consistency

Sys_var_enforce_gtid_consistency Sys_enforce_gtid_consistency("enforce_gtid_consistency", "Prevents execution of statements that would be impossible to log " "in a transactionally safe manner. Currently, the disallowed " "statements include CREATE TEMPORARY TABLE inside transactions, " "all updates to non-transactional tables, and CREATE TABLE ... SELECT.", PERSIST_AS_READONLY GLOBAL_VAR(_gtid_consistency_mode), CMD_LINE(OPT_ARG, OPT_ENFORCE_GTID_CONSISTENCY), enforce_gtid_consistency_aliases, 3, DEFAULT(3), DEFAULT(GTID_CONSISTENCY_MODE_ON), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_session_admin_outside_trx_outside_sf_outside_sp)) ( "enforce_gtid_consistency"  ,
"Prevents execution of statements that would be impossible to log " "in a transactionally safe manner.  Currently,
the disallowed " "statements include CREATE TEMPORARY TABLE inside  transactions,
" "all updates to non-transactional  tables,
and CREATE TABLE ... SELECT."  ,
PERSIST_AS_READONLY   GLOBAL_VAR_gtid_consistency_mode,
CMD_LINE(OPT_ARG, OPT_ENFORCE_GTID_CONSISTENCY ,
enforce_gtid_consistency_aliases  ,
,
DEFAULT(3)  ,
DEFAULT(GTID_CONSISTENCY_MODE_ON ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(check_session_admin_outside_trx_outside_sf_outside_sp  
)
static

◆ Sys_eq_range_index_dive_limit

Sys_var_uint Sys_eq_range_index_dive_limit("eq_range_index_dive_limit", "The optimizer will use existing index statistics instead of " "doing index dives for equality ranges if the number of equality " "ranges for the index is larger than or equal to this number. " "If set to 0, index dives are always used.", HINT_UPDATEABLE SESSION_VAR(eq_range_index_dive_limit), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, UINT_MAX32), DEFAULT(200), BLOCK_SIZE(1)) ( "eq_range_index_dive_limit"  ,
"The optimizer will use existing index statistics instead of " "doing index dives for equality ranges if the number of equality " "ranges for the index is larger than or equal to this number. " "If set to  0,
index dives are always used."  ,
HINT_UPDATEABLE   SESSION_VAReq_range_index_dive_limit,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(0, UINT_MAX32 ,
DEFAULT(200)  ,
BLOCK_SIZE(1)   
)
static

◆ Sys_error_count

Sys_var_session_special Sys_error_count("error_count", "The number of errors that resulted from the " "last statement that generated messages", READ_ONLY sys_var::ONLY_SESSION, NO_CMD_LINE, VALID_RANGE(0, ULLONG_MAX), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(nullptr), ON_READ(read_error_count)) ( "error_count"  ,
"The number of errors that resulted from the " "last statement that generated messages"  ,
READ_ONLY sys_var::ONLY_SESSION  ,
NO_CMD_LINE  ,
VALID_RANGE(0, ULLONG_MAX)  ,
BLOCK_SIZE(1)  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(nullptr ,
ON_UPDATE(nullptr ,
ON_READ(read_error_count  
)
static

◆ Sys_event_scheduler

Sys_var_enum Sys_event_scheduler("event_scheduler", "Enable the event scheduler. Possible values are " "ON, OFF, and DISABLED (keep the event scheduler completely " "deactivated, it cannot be activated run-time)", GLOBAL_VAR(Events::opt_event_scheduler), CMD_LINE(OPT_ARG), event_scheduler_names, DEFAULT(Events::EVENTS_ON), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(event_scheduler_check), ON_UPDATE(event_scheduler_update)) ( "event_scheduler"  ,
"Enable the event scheduler. Possible values are " "  ON,
OFF  ,
and DISABLED(keep the event scheduler completely " "deactivated, it cannot be activated run-time)"  ,
GLOBAL_VAR(Events::opt_event_scheduler ,
CMD_LINE(OPT_ARG ,
event_scheduler_names  ,
DEFAULT(Events::EVENTS_ON ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(event_scheduler_check ,
ON_UPDATE(event_scheduler_update  
)
static

◆ Sys_explain_format

Sys_var_enum Sys_explain_format("explain_format", "The default format in which the EXPLAIN statement displays information. " "Valid values are TRADITIONAL (default), TREE, JSON and TRADITIONAL_STRICT." " TRADITIONAL_STRICT is only used internally by the mtr test suite, and is " "not meant to be used anywhere else.", SESSION_VAR(explain_format), CMD_LINE(OPT_ARG), explain_format_names, DEFAULT(static_cast< ulong >(Explain_format_type::TRADITIONAL)), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(nullptr)) ( "explain_format"  ,
"The default format in which the EXPLAIN statement displays information. " "Valid values are TRADITIONAL   default,
TREE  ,
JSON and TRADITIONAL_STRICT." " TRADITIONAL_STRICT is only used internally by the mtr test  suite,
and is " "not meant to be used anywhere else."  ,
SESSION_VAR(explain_format)  ,
CMD_LINE(OPT_ARG ,
explain_format_names  ,
DEFAULT(static_cast< ulong >(Explain_format_type::TRADITIONAL))  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(nullptr ,
ON_UPDATE(nullptr  
)
static

◆ Sys_explain_json_format_version

Sys_var_uint Sys_explain_json_format_version("explain_json_format_version", "The JSON format version for EXPLAIN FORMAT=JSON queries with the old " "(non-hypergraph) join optimizer. " "Valid values are 1 and 2.", SESSION_VAR(explain_json_format_version), CMD_LINE(REQUIRED_ARG), VALID_RANGE(1, 2), DEFAULT(1), BLOCK_SIZE(1)) ( "explain_json_format_version"  )
static

◆ Sys_explicit_defaults_for_timestamp

Sys_var_bool Sys_explicit_defaults_for_timestamp("explicit_defaults_for_timestamp", "This option causes CREATE TABLE to create all TIMESTAMP columns " "as NULL with DEFAULT NULL attribute, Without this option, " "TIMESTAMP columns are NOT NULL and have implicit DEFAULT clauses. " "The old behavior is deprecated. " "The variable can only be set by users having the SUPER privilege.", SESSION_VAR(explicit_defaults_for_timestamp), CMD_LINE(OPT_ARG), DEFAULT(true), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_explicit_defaults_for_timestamp)) ( "explicit_defaults_for_timestamp"  ,
"This option causes CREATE TABLE to create all TIMESTAMP columns " "as NULL with DEFAULT NULL  attribute,
Without this  option,
" "TIMESTAMP columns are NOT NULL and have implicit DEFAULT clauses. " "The old behavior is deprecated. " "The variable can only be set by users having the SUPER privilege."  ,
SESSION_VAR(explicit_defaults_for_timestamp)  ,
CMD_LINE(OPT_ARG ,
DEFAULT(true)  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(check_explicit_defaults_for_timestamp  
)
static

This variable is read only to users.

It can be enabled or disabled only at mysqld startup. This variable is used by User thread and as well as by replication slave applier thread to apply relay_log. Slave applier thread enables/disables this option based on relay_log's from replication master versions. There is possibility of slave applier thread and User thread to have different setting for explicit_defaults_for_timestamp, hence this options is defined as SESSION_VAR rather than GLOBAL_VAR.

◆ Sys_external_user

Sys_var_external_user Sys_external_user("external_user", "The external user account used when logging in", IN_SYSTEM_CHARSET) ( "external_user"  ,
"The external user account used when logging in"  ,
IN_SYSTEM_CHARSET   
)
static

◆ Sys_flush

Sys_var_bool Sys_flush("flush", "Flush MyISAM tables to disk between SQL commands", GLOBAL_VAR(myisam_flush), CMD_LINE(OPT_ARG), DEFAULT(false)) ( "flush"  ,
"Flush MyISAM tables to disk between SQL commands ,
GLOBAL_VAR(myisam_flush ,
CMD_LINE(OPT_ARG ,
DEFAULT(false)   
)
static

◆ Sys_flush_time

Sys_var_ulong Sys_flush_time("flush_time", "A dedicated thread is created to flush all tables at the " "given interval", GLOBAL_VAR(flush_time), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, LONG_TIMEOUT), DEFAULT(0), BLOCK_SIZE(1)) ( "flush_time"  ,
"A dedicated thread is created to flush all tables at the " "given interval ,
GLOBAL_VAR(flush_time ,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(0, LONG_TIMEOUT ,
DEFAULT(0)  ,
BLOCK_SIZE(1)   
)
static

◆ Sys_foreign_key_checks

Sys_var_bit Sys_foreign_key_checks("foreign_key_checks", "foreign_key_checks", HINT_UPDATEABLE SESSION_VAR(option_bits), NO_CMD_LINE, REVERSE(OPTION_NO_FOREIGN_KEY_CHECKS), DEFAULT(true), NO_MUTEX_GUARD, IN_BINLOG) ( "foreign_key_checks"  ,
"foreign_key_checks"  ,
HINT_UPDATEABLE   SESSION_VARoption_bits,
NO_CMD_LINE  ,
REVERSE(OPTION_NO_FOREIGN_KEY_CHECKS ,
DEFAULT(true)  ,
NO_MUTEX_GUARD  ,
IN_BINLOG   
)
static

◆ Sys_ft_boolean_syntax

Sys_var_charptr Sys_ft_boolean_syntax("ft_boolean_syntax", "List of operators for " "MATCH ... AGAINST ( ... IN BOOLEAN MODE)", GLOBAL_VAR(ft_boolean_syntax), CMD_LINE(REQUIRED_ARG), IN_SYSTEM_CHARSET, DEFAULT(DEFAULT_FTB_SYNTAX), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_ftb_syntax)) ( "ft_boolean_syntax"  ,
"List of operators for " "MATCH ... AGAINST ( ... IN BOOLEAN MODE)"  ,
GLOBAL_VAR(ft_boolean_syntax ,
CMD_LINE(REQUIRED_ARG ,
IN_SYSTEM_CHARSET  ,
DEFAULT(DEFAULT_FTB_SYNTAX ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(check_ftb_syntax  
)
static

◆ Sys_ft_max_word_len

Sys_var_ulong Sys_ft_max_word_len("ft_max_word_len", "The maximum length of the word to be included in a FULLTEXT index. " "Note: FULLTEXT indexes must be rebuilt after changing this variable", READ_ONLY GLOBAL_VAR(ft_max_word_len), CMD_LINE(REQUIRED_ARG), VALID_RANGE(10, HA_FT_MAXCHARLEN), DEFAULT(HA_FT_MAXCHARLEN), BLOCK_SIZE(1)) ( "ft_max_word_len"  ,
"The maximum length of the word to be included in a FULLTEXT index. " "Note: FULLTEXT indexes must be rebuilt after changing this variable"  ,
READ_ONLY   GLOBAL_VARft_max_word_len,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(10, HA_FT_MAXCHARLEN ,
DEFAULT(HA_FT_MAXCHARLEN ,
BLOCK_SIZE(1)   
)
static

◆ Sys_ft_min_word_len

Sys_var_ulong Sys_ft_min_word_len("ft_min_word_len", "The minimum length of the word to be included in a FULLTEXT index. " "Note: FULLTEXT indexes must be rebuilt after changing this variable", READ_ONLY GLOBAL_VAR(ft_min_word_len), CMD_LINE(REQUIRED_ARG), VALID_RANGE(1, HA_FT_MAXCHARLEN), DEFAULT(4), BLOCK_SIZE(1)) ( "ft_min_word_len"  ,
"The minimum length of the word to be included in a FULLTEXT index. " "Note: FULLTEXT indexes must be rebuilt after changing this variable"  ,
READ_ONLY   GLOBAL_VARft_min_word_len,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(1, HA_FT_MAXCHARLEN ,
DEFAULT(4)  ,
BLOCK_SIZE(1)   
)
static

◆ Sys_ft_query_expansion_limit

Sys_var_ulong Sys_ft_query_expansion_limit("ft_query_expansion_limit", "Number of best matches to use for query expansion", READ_ONLY GLOBAL_VAR(ft_query_expansion_limit), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, 1000), DEFAULT(20), BLOCK_SIZE(1)) ( "ft_query_expansion_limit"  ,
"Number of best matches to use for query expansion"  ,
READ_ONLY   GLOBAL_VARft_query_expansion_limit,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(0, 1000)  ,
DEFAULT(20)  ,
BLOCK_SIZE(1)   
)
static

◆ Sys_ft_stopword_file

Sys_var_charptr Sys_ft_stopword_file("ft_stopword_file", "Use stopwords from this file instead of built-in list", READ_ONLY NON_PERSIST GLOBAL_VAR(ft_stopword_file), CMD_LINE(REQUIRED_ARG), IN_FS_CHARSET, DEFAULT(nullptr)) ( "ft_stopword_file"  ,
"Use stopwords from this file instead of built-in list"  ,
READ_ONLY NON_PERSIST   GLOBAL_VARft_stopword_file,
CMD_LINE(REQUIRED_ARG ,
IN_FS_CHARSET  ,
DEFAULT(nullptr  
)
static

◆ Sys_general_log

Sys_var_bool Sys_general_log("general_log", "Log connections and queries to a table or log file. " "Defaults to logging to a file hostname.log, " "or if --log-output=TABLE is used, to a table mysql.general_log.", GLOBAL_VAR(opt_general_log), CMD_LINE(OPT_ARG), DEFAULT(false), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(fix_general_log_state)) ( "general_log"  ,
"Log connections and queries to a table or log file. " "Defaults to logging to a file hostname.  log,
" "or if --log-  output = TABLE is used,
to a table mysql.general_log."  ,
GLOBAL_VAR(opt_general_log ,
CMD_LINE(OPT_ARG ,
DEFAULT(false)  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(nullptr ,
ON_UPDATE(fix_general_log_state  
)
static

◆ Sys_general_log_path

Sys_var_charptr Sys_general_log_path("general_log_file", "Log connections and queries to given file", GLOBAL_VAR(opt_general_logname), CMD_LINE(REQUIRED_ARG), IN_FS_CHARSET, DEFAULT(nullptr), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_log_path), ON_UPDATE(fix_general_log_file)) ( "general_log_file"  ,
"Log connections and queries to given file"  ,
GLOBAL_VAR(opt_general_logname ,
CMD_LINE(REQUIRED_ARG ,
IN_FS_CHARSET  ,
DEFAULT(nullptr ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(check_log_path ,
ON_UPDATE(fix_general_log_file  
)
static

◆ Sys_generated_random_password_length

Sys_var_uint Sys_generated_random_password_length("generated_random_password_length", "Determines the length randomly generated passwords in CREATE USER-," "SET PASSWORD- or ALTER USER statements", SESSION_VAR(generated_random_password_length), CMD_LINE(REQUIRED_ARG), VALID_RANGE(5, 255), DEFAULT(20), BLOCK_SIZE(1), NO_MUTEX_GUARD, IN_BINLOG, ON_CHECK(nullptr)) ( "generated_random_password_length"  ,
"Determines the length randomly generated passwords in CREATE USER ,
" "SET PASSWORD- or ALTER USER statements"  ,
SESSION_VAR(generated_random_password_length)  ,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(5, 255)  ,
DEFAULT(20)  ,
BLOCK_SIZE(1)  ,
NO_MUTEX_GUARD  ,
IN_BINLOG  ,
ON_CHECK(nullptr  
)
static

◆ Sys_global_connection_memory_limit

Sys_var_ulonglong Sys_global_connection_memory_limit("global_connection_memory_limit", "Maximum amount of memory all connections can consume", GLOBAL_VAR(global_conn_mem_limit), CMD_LINE(REQUIRED_ARG), VALID_RANGE(1, max_mem_sz), DEFAULT(max_mem_sz), BLOCK_SIZE(1), &PLock_global_conn_mem_limit, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(nullptr)) ( "global_connection_memory_limit"  ,
"Maximum amount of memory all connections can consume"  ,
GLOBAL_VAR(global_conn_mem_limit ,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(1, max_mem_sz ,
DEFAULT(max_mem_sz ,
BLOCK_SIZE(1)  ,
PLock_global_conn_mem_limit,
NOT_IN_BINLOG  ,
ON_CHECK(nullptr ,
ON_UPDATE(nullptr  
)
static

◆ Sys_group_concat_max_len

Sys_var_ulong Sys_group_concat_max_len("group_concat_max_len", "The maximum length of the result of function GROUP_CONCAT()", HINT_UPDATEABLE SESSION_VAR(group_concat_max_len), CMD_LINE(REQUIRED_ARG), VALID_RANGE(4, ULONG_MAX), DEFAULT(1024), BLOCK_SIZE(1)) ( "group_concat_max_len"  ,
"The maximum length of the result of function GROUP_CONCAT()"  ,
HINT_UPDATEABLE   SESSION_VARgroup_concat_max_len,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(4, ULONG_MAX)  ,
DEFAULT(1024)  ,
BLOCK_SIZE(1)   
)
static

◆ Sys_group_replication_consistency

Sys_var_enum Sys_group_replication_consistency("group_replication_consistency", "Transaction consistency guarantee, possible values: EVENTUAL, " "BEFORE_ON_PRIMARY_FAILOVER, BEFORE, AFTER, BEFORE_AND_AFTER", SESSION_VAR(group_replication_consistency), CMD_LINE(OPT_ARG), group_replication_consistency_names, DEFAULT(GROUP_REPLICATION_CONSISTENCY_BEFORE_ON_PRIMARY_FAILOVER), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_group_replication_consistency), ON_UPDATE(nullptr)) ( "group_replication_consistency"  ,
"Transaction consistency  guarantee,
possible values:EVENTUAL  ,
" "  BEFORE_ON_PRIMARY_FAILOVER,
BEFORE  ,
AFTER  ,
BEFORE_AND_AFTER"  ,
SESSION_VAR(group_replication_consistency)  ,
CMD_LINE(OPT_ARG ,
group_replication_consistency_names  ,
DEFAULT(GROUP_REPLICATION_CONSISTENCY_BEFORE_ON_PRIMARY_FAILOVER ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(check_group_replication_consistency ,
ON_UPDATE(nullptr  
)
static

◆ Sys_gtid_executed

Sys_var_gtid_executed Sys_gtid_executed("gtid_executed", "The global variable contains the set of GTIDs in the " "binary log. The session variable contains the set of GTIDs " "in the current, ongoing transaction.") ( "gtid_executed"  ,
"The global variable contains the set of GTIDs in the " "binary log. The session variable contains the set of GTIDs " "in the  current,
ongoing transaction."   
)
static

◆ Sys_gtid_executed_compression_period

Sys_var_uint Sys_gtid_executed_compression_period("gtid_executed_compression_period", "Compress the mysql.gtid_executed table whenever this number of " "transactions have been added, by waking up a foreground thread " "(compress_gtid_table). This compression method only operates when " "binary logging is disabled on the replica; if binary logging is " "enabled, the table is compressed every time the binary log is " "rotated, and this value is ignored. Before MySQL 8.0.23, the " "default is 1000, and from MySQL 8.0.23, the default is zero, which " "disables this compression method. This is because in releases from " "MySQL 8.0.17, InnoDB transactions are written to the " "mysql.gtid_executed table by a separate process to non-InnoDB " "transactions. If the server has a mix of InnoDB and non-InnoDB " "transactions, attempting to compress the table with the " "compress_gtid_table thread can slow this process, so from " "MySQL 8.0.17 it is recommended that you set " "gtid_executed_compression_period to 0.", GLOBAL_VAR(gtid_executed_compression_period), CMD_LINE(OPT_ARG), VALID_RANGE(0, UINT_MAX32), DEFAULT(0), BLOCK_SIZE(1)) ( "gtid_executed_compression_period"  ,
"Compress the mysql.gtid_executed table whenever this number of " "transactions have been  added,
by waking up a foreground thread " "(compress_gtid_table). This compression method only operates when " "binary logging is disabled on the replica;if binary logging is " "  enabled,
the table is compressed every time the binary log is " "  rotated,
and this value is ignored. Before MySQL 8.0.  23,
the " "default is  1000,
and from MySQL 8.0.  23,
the default is  zero,
which " "disables this compression method. This is because in releases from " "MySQL 8.0.  17,
InnoDB transactions are written to the " "mysql.gtid_executed table by a separate process to non-InnoDB " "transactions. If the server has a mix of InnoDB and non-InnoDB " "  transactions,
attempting to compress the table with the " "compress_gtid_table thread can slow this  process,
so from " "MySQL 8.0.17 it is recommended that you set " "gtid_executed_compression_period to 0."  ,
GLOBAL_VAR(gtid_executed_compression_period ,
CMD_LINE(OPT_ARG ,
VALID_RANGE(0, UINT_MAX32 ,
DEFAULT(0)  ,
BLOCK_SIZE(1)   
)
static

◆ Sys_gtid_mode

Sys_var_gtid_mode Sys_gtid_mode("gtid_mode", "Controls whether Global Transaction Identifiers (GTIDs) are " "enabled. Can be OFF, OFF_PERMISSIVE, ON_PERMISSIVE, or ON. OFF " "means that no transaction has a GTID. OFF_PERMISSIVE means that " "new transactions (committed in a client session using " "GTID_NEXT='AUTOMATIC') are not assigned any GTID, and " "replicated transactions are allowed to have or not have a " "GTID. ON_PERMISSIVE means that new transactions are assigned a " "GTID, and replicated transactions are allowed to have or not " "have a GTID. ON means that all transactions have a GTID. " "ON is required on a source before any replica can use " "SOURCE_AUTO_POSITION=1. To safely switch from OFF to ON, first " "set all servers to OFF_PERMISSIVE, then set all servers to " "ON_PERMISSIVE, then wait for all transactions without a GTID to " "be replicated and executed on all servers, and finally set all " "servers to GTID_MODE = ON.", PERSIST_AS_READONLY GLOBAL_VAR(Gtid_mode::sysvar_mode), CMD_LINE(REQUIRED_ARG), Gtid_mode::names, DEFAULT(Gtid_mode::DEFAULT), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_session_admin_outside_trx_outside_sf_outside_sp)) ( "gtid_mode"  ,
"Controls whether Global Transaction Identifiers (GTIDs) are " "enabled. Can be  OFF,
OFF_PERMISSIVE  ,
ON_PERMISSIVE  ,
or ON. OFF " "means that no transaction has a GTID. OFF_PERMISSIVE means that " "new transactions(committed in a client session using " "GTID_NEXT='AUTOMATIC') are not assigned any  GTID,
and " "replicated transactions are allowed to have or not have a " "GTID. ON_PERMISSIVE means that new transactions are assigned a " "  GTID,
and replicated transactions are allowed to have or not " "have a GTID. ON means that all transactions have a GTID. " "ON is required on a source before any replica can use " "  SOURCE_AUTO_POSITION = 1. To safely switch from OFF to ON,
first " "set all servers to  OFF_PERMISSIVE,
then set all servers to " "  ON_PERMISSIVE,
then wait for all transactions without a GTID to " "be replicated and executed on all  servers 
)
static

◆ Sys_gtid_next

Sys_var_gtid_next Sys_gtid_next("gtid_next", "Specifies the Global Transaction Identifier for the following " "transaction.", SESSION_ONLY(gtid_next), NO_CMD_LINE, DEFAULT("AUTOMATIC"), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_gtid_next)) ( "gtid_next"  ,
"Specifies the Global Transaction Identifier for the following " "transaction."  ,
SESSION_ONLY(gtid_next)  ,
NO_CMD_LINE  ,
DEFAULT("AUTOMATIC")  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(check_gtid_next  
)
static

◆ Sys_gtid_next_ptr

export sys_var* Sys_gtid_next_ptr = &Sys_gtid_next

◆ Sys_gtid_owned

Sys_var_gtid_owned Sys_gtid_owned("gtid_owned", "The global variable lists all GTIDs owned by all threads. " "The session variable lists all GTIDs owned by the current thread.") ( "gtid_owned"  ,
"The global variable lists all GTIDs owned by all threads. " "The session variable lists all GTIDs owned by the current thread."   
)
static

◆ Sys_gtid_purged

Sys_var_gtid_purged Sys_gtid_purged("gtid_purged", "The set of GTIDs that existed in previous, purged binary logs.", NON_PERSIST GLOBAL_VAR(gtid_purged), NO_CMD_LINE, DEFAULT(nullptr), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_gtid_purged)) ( "gtid_purged"  ,
"The set of GTIDs that existed in  previous,
purged binary logs."  ,
NON_PERSIST   GLOBAL_VARgtid_purged,
NO_CMD_LINE  ,
DEFAULT(nullptr ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(check_gtid_purged  
)
static

◆ Sys_gtid_purged_ptr

export sys_var* Sys_gtid_purged_ptr = &Sys_gtid_purged

◆ Sys_have_compress

Sys_var_have Sys_have_compress("have_compress", "have_compress", READ_ONLY NON_PERSIST GLOBAL_VAR(have_compress), NO_CMD_LINE) ( "have_compress"  ,
"have_compress"  ,
READ_ONLY NON_PERSIST   GLOBAL_VARhave_compress,
NO_CMD_LINE   
)
static

◆ Sys_have_dlopen

Sys_var_have Sys_have_dlopen("have_dynamic_loading", "have_dynamic_loading", READ_ONLY NON_PERSIST GLOBAL_VAR(have_dlopen), NO_CMD_LINE) ( "have_dynamic_loading"  ,
"have_dynamic_loading"  ,
READ_ONLY NON_PERSIST   GLOBAL_VARhave_dlopen,
NO_CMD_LINE   
)
static

◆ Sys_have_geometry

Sys_var_have Sys_have_geometry("have_geometry", "have_geometry", READ_ONLY NON_PERSIST GLOBAL_VAR(have_geometry), NO_CMD_LINE) ( "have_geometry"  ,
"have_geometry"  ,
READ_ONLY NON_PERSIST   GLOBAL_VARhave_geometry,
NO_CMD_LINE   
)
static

◆ Sys_have_profiling

Sys_var_have Sys_have_profiling("have_profiling", "have_profiling", READ_ONLY NON_PERSIST GLOBAL_VAR(have_profiling), NO_CMD_LINE, NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(nullptr), DEPRECATED_VAR("")) ( "have_profiling"  ,
"have_profiling"  ,
READ_ONLY NON_PERSIST   GLOBAL_VARhave_profiling,
NO_CMD_LINE  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(nullptr ,
ON_UPDATE(nullptr ,
DEPRECATED_VAR("")   
)
static

◆ Sys_have_query_cache

Sys_var_have Sys_have_query_cache("have_query_cache", "have_query_cache. " "This variable is deprecated and will be removed in a future release.", READ_ONLY NON_PERSIST GLOBAL_VAR(have_query_cache), NO_CMD_LINE, NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(nullptr), DEPRECATED_VAR("")) ( "have_query_cache"  ,
"have_query_cache. " "This variable is deprecated and will be removed in a future release."  ,
READ_ONLY NON_PERSIST   GLOBAL_VARhave_query_cache,
NO_CMD_LINE  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(nullptr ,
ON_UPDATE(nullptr ,
DEPRECATED_VAR("")   
)
static

◆ Sys_have_rtree_keys

Sys_var_have Sys_have_rtree_keys("have_rtree_keys", "have_rtree_keys", READ_ONLY NON_PERSIST GLOBAL_VAR(have_rtree_keys), NO_CMD_LINE) ( "have_rtree_keys"  ,
"have_rtree_keys"  ,
READ_ONLY NON_PERSIST   GLOBAL_VARhave_rtree_keys,
NO_CMD_LINE   
)
static

◆ Sys_have_statement_timeout

Sys_var_have Sys_have_statement_timeout("have_statement_timeout", "have_statement_timeout", READ_ONLY NON_PERSIST GLOBAL_VAR(have_statement_timeout), NO_CMD_LINE) ( "have_statement_timeout"  ,
"have_statement_timeout"  ,
READ_ONLY NON_PERSIST   GLOBAL_VARhave_statement_timeout,
NO_CMD_LINE   
)
static

◆ Sys_have_symlink

Sys_var_have Sys_have_symlink("have_symlink", "have_symlink", READ_ONLY NON_PERSIST GLOBAL_VAR(have_symlink), NO_CMD_LINE) ( "have_symlink"  ,
"have_symlink"  ,
READ_ONLY NON_PERSIST   GLOBAL_VARhave_symlink,
NO_CMD_LINE   
)
static

◆ Sys_histogram_generation_max_mem_size

Sys_var_ulonglong Sys_histogram_generation_max_mem_size("histogram_generation_max_mem_size", "Maximum amount of memory available for generating histograms", SESSION_VAR(histogram_generation_max_mem_size), CMD_LINE(REQUIRED_ARG), VALID_RANGE(1000000, max_mem_sz), DEFAULT(20000000), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_session_admin), ON_UPDATE(nullptr)) ( "histogram_generation_max_mem_size"  ,
"Maximum amount of memory available for generating histograms"  ,
SESSION_VAR(histogram_generation_max_mem_size)  ,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(1000000, max_mem_sz ,
DEFAULT(20000000)  ,
BLOCK_SIZE(1)  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(check_session_admin ,
ON_UPDATE(nullptr  
)
static

◆ Sys_host_cache_size

Sys_var_uint Sys_host_cache_size("host_cache_size", "How many host names should be cached to avoid resolving.", GLOBAL_VAR(host_cache_size), CMD_LINE(REQUIRED_ARG, OPT_HOST_CACHE_SIZE), VALID_RANGE(0, 65536), DEFAULT(HOST_CACHE_SIZE), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(fix_host_cache_size)) ( "host_cache_size"  ,
"How many host names should be cached to avoid resolving."  ,
GLOBAL_VAR(host_cache_size ,
CMD_LINE(REQUIRED_ARG, OPT_HOST_CACHE_SIZE ,
VALID_RANGE(0, 65536)  ,
DEFAULT(HOST_CACHE_SIZE ,
BLOCK_SIZE(1)  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(nullptr ,
ON_UPDATE(fix_host_cache_size  
)
static

◆ Sys_hostname

Sys_var_charptr Sys_hostname("hostname", "Server host name", READ_ONLY NON_PERSIST GLOBAL_VAR(glob_hostname_ptr), NO_CMD_LINE, IN_FS_CHARSET, DEFAULT(glob_hostname)) ( "hostname"  ,
"Server host name ,
READ_ONLY NON_PERSIST   GLOBAL_VARglob_hostname_ptr,
NO_CMD_LINE  ,
IN_FS_CHARSET  ,
DEFAULT(glob_hostname  
)
static

◆ Sys_identity

Sys_var_session_special Sys_identity("identity", "Synonym for the last_insert_id variable", sys_var::ONLY_SESSION, NO_CMD_LINE, VALID_RANGE(0, ULLONG_MAX), BLOCK_SIZE(1), NO_MUTEX_GUARD, IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(update_last_insert_id), ON_READ(read_last_insert_id)) ( "identity"  ,
"Synonym for the last_insert_id variable"  ,
sys_var::ONLY_SESSION  ,
NO_CMD_LINE  ,
VALID_RANGE(0, ULLONG_MAX)  ,
BLOCK_SIZE(1)  ,
NO_MUTEX_GUARD  ,
IN_BINLOG  ,
ON_CHECK(nullptr ,
ON_UPDATE(update_last_insert_id ,
ON_READ(read_last_insert_id  
)
static

◆ Sys_immediate_server_version

Sys_var_uint Sys_immediate_server_version("immediate_server_version", "The server version of the immediate server in the replication topology", SESSION_ONLY(immediate_server_version), NO_CMD_LINE, VALID_RANGE(0, UNDEFINED_SERVER_VERSION), DEFAULT(UNDEFINED_SERVER_VERSION), BLOCK_SIZE(1), NO_MUTEX_GUARD, IN_BINLOG, ON_CHECK(check_session_admin_or_replication_applier)) ( "immediate_server_version"  ,
"The server version of the immediate server in the replication topology"  ,
SESSION_ONLY(immediate_server_version)  ,
NO_CMD_LINE  ,
VALID_RANGE(0, UNDEFINED_SERVER_VERSION ,
DEFAULT(UNDEFINED_SERVER_VERSION ,
BLOCK_SIZE(1)  ,
NO_MUTEX_GUARD  ,
IN_BINLOG  ,
ON_CHECK(check_session_admin_or_replication_applier  
)
static

◆ Sys_information_schema_stats_expiry

Sys_var_ulong Sys_information_schema_stats_expiry("information_schema_stats_expiry", "The number of seconds after which mysqld server will fetch " "data from storage engine and replace the data in cache.", SESSION_VAR(information_schema_stats_expiry), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, LONG_TIMEOUT), DEFAULT(24 *60 *60), BLOCK_SIZE(1)) ( "information_schema_stats_expiry"  ,
"The number of seconds after which mysqld server will fetch " "data from storage engine and replace the data in cache."  ,
SESSION_VAR(information_schema_stats_expiry)  ,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(0, LONG_TIMEOUT ,
DEFAULT(24 *60 *60)  ,
BLOCK_SIZE(1)   
)
static

◆ Sys_init_connect

Sys_var_lexstring Sys_init_connect("init_connect", "Command(s) that are executed for each " "new connection", GLOBAL_VAR(opt_init_connect), CMD_LINE(REQUIRED_ARG), IN_SYSTEM_CHARSET, DEFAULT(""), &PLock_sys_init_connect, NOT_IN_BINLOG, ON_CHECK(check_init_string)) ( "init_connect"  ,
"Command(s) that are executed for each " "new connection"  ,
GLOBAL_VAR(opt_init_connect ,
CMD_LINE(REQUIRED_ARG ,
IN_SYSTEM_CHARSET  ,
DEFAULT("")  ,
PLock_sys_init_connect,
NOT_IN_BINLOG  ,
ON_CHECK(check_init_string  
)
static

◆ Sys_init_file

Sys_var_charptr Sys_init_file("init_file", "Read SQL commands from this file at startup", READ_ONLY NON_PERSIST GLOBAL_VAR(opt_init_file), CMD_LINE(REQUIRED_ARG), IN_FS_CHARSET, DEFAULT(nullptr)) ( "init_file"  ,
"Read SQL commands from this file at startup"  ,
READ_ONLY NON_PERSIST   GLOBAL_VARopt_init_file,
CMD_LINE(REQUIRED_ARG ,
IN_FS_CHARSET  ,
DEFAULT(nullptr  
)
static

◆ Sys_init_replica

Sys_var_lexstring Sys_init_replica("init_replica", "Command(s) that are executed by the replication applier thread " "each time the applier threads start.", GLOBAL_VAR(opt_init_replica), CMD_LINE(REQUIRED_ARG), IN_SYSTEM_CHARSET, DEFAULT(""), &PLock_sys_init_replica, NOT_IN_BINLOG, ON_CHECK(check_init_string)) ( "init_replica"  ,
"Command(s) that are executed by the replication applier thread " "each time the applier threads start."  ,
GLOBAL_VAR(opt_init_replica ,
CMD_LINE(REQUIRED_ARG ,
IN_SYSTEM_CHARSET  ,
DEFAULT("")  ,
PLock_sys_init_replica,
NOT_IN_BINLOG  ,
ON_CHECK(check_init_string  
)
static

◆ Sys_init_slave

Sys_var_deprecated_alias Sys_init_slave("init_slave", Sys_init_replica) ( "init_slave"  ,
Sys_init_replica   
)
static

◆ Sys_insert_id

Sys_var_session_special Sys_insert_id("insert_id", "The value to be used by the following INSERT " "or ALTER TABLE statement when inserting an AUTO_INCREMENT value", HINT_UPDATEABLE sys_var::ONLY_SESSION, NO_CMD_LINE, VALID_RANGE(0, ULLONG_MAX), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(update_insert_id), ON_READ(read_insert_id)) ( "insert_id"  ,
"The value to be used by the following INSERT " "or ALTER TABLE statement when inserting an AUTO_INCREMENT value"  ,
HINT_UPDATEABLE sys_var::ONLY_SESSION  ,
NO_CMD_LINE  ,
VALID_RANGE(0, ULLONG_MAX)  ,
BLOCK_SIZE(1)  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(nullptr ,
ON_UPDATE(update_insert_id ,
ON_READ(read_insert_id  
)
static

◆ Sys_interactive_timeout

Sys_var_ulong Sys_interactive_timeout("interactive_timeout", "The number of seconds the server waits for activity on an interactive " "connection before closing it", SESSION_VAR(net_interactive_timeout), CMD_LINE(REQUIRED_ARG), VALID_RANGE(1, LONG_TIMEOUT), DEFAULT(NET_WAIT_TIMEOUT), BLOCK_SIZE(1)) ( "interactive_timeout"  ,
"The number of seconds the server waits for activity on an interactive " "connection before closing it"  ,
SESSION_VAR(net_interactive_timeout)  ,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(1, LONG_TIMEOUT ,
DEFAULT(NET_WAIT_TIMEOUT ,
BLOCK_SIZE(1)   
)
static

◆ Sys_internal_tmp_mem_storage_engine

Sys_var_enum Sys_internal_tmp_mem_storage_engine("internal_tmp_mem_storage_engine", "The default storage engine for in-memory internal temporary tables.", HINT_UPDATEABLE SESSION_VAR(internal_tmp_mem_storage_engine), CMD_LINE(REQUIRED_ARG), internal_tmp_mem_storage_engine_names, DEFAULT(TMP_TABLE_TEMPTABLE), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_session_admin_no_super)) ( "internal_tmp_mem_storage_engine"  ,
"The default storage engine for in-memory internal temporary tables."  ,
HINT_UPDATEABLE   SESSION_VARinternal_tmp_mem_storage_engine,
CMD_LINE(REQUIRED_ARG ,
internal_tmp_mem_storage_engine_names  ,
DEFAULT(TMP_TABLE_TEMPTABLE ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(check_session_admin_no_super  
)
static

◆ Sys_join_buffer_size

Sys_var_ulong Sys_join_buffer_size("join_buffer_size", "The size of the buffer that is used for full joins", HINT_UPDATEABLE SESSION_VAR(join_buff_size), CMD_LINE(REQUIRED_ARG), VALID_RANGE(128, ULONG_MAX), DEFAULT(256 *1024), BLOCK_SIZE(128)) ( "join_buffer_size"  ,
"The size of the buffer that is used for full joins"  ,
HINT_UPDATEABLE   SESSION_VARjoin_buff_size,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(128, ULONG_MAX)  ,
DEFAULT(256 *1024)  ,
BLOCK_SIZE(128)   
)
static

◆ Sys_keep_files_on_create

Sys_var_bool Sys_keep_files_on_create("keep_files_on_create", "Don't overwrite stale .MYD and .MYI even if no directory is specified", SESSION_VAR(keep_files_on_create), CMD_LINE(OPT_ARG), DEFAULT(false)) ( "keep_files_on_create"  ,
"Don't overwrite stale .MYD and .MYI even if no directory is specified"  ,
SESSION_VAR(keep_files_on_create)  ,
CMD_LINE(OPT_ARG ,
DEFAULT(false)   
)
static

◆ Sys_key_buffer_size

Sys_var_keycache Sys_key_buffer_size("key_buffer_size", "The size of the buffer used for " "index blocks for MyISAM tables. Increase this to get better index " "handling (for all reads and multiple writes) to as much as you can " "afford", KEYCACHE_VAR(param_buff_size), CMD_LINE(REQUIRED_ARG, OPT_KEY_BUFFER_SIZE), VALID_RANGE(0, SIZE_T_MAX), DEFAULT(KEY_CACHE_SIZE), BLOCK_SIZE(IO_SIZE), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(update_buffer_size)) ( "key_buffer_size"  ,
"The size of the buffer used for " "index blocks for MyISAM tables. Increase this to get better index " "handling (for all reads and multiple writes) to as much as you can " "afford"  ,
KEYCACHE_VAR(param_buff_size)  ,
CMD_LINE(REQUIRED_ARG, OPT_KEY_BUFFER_SIZE ,
VALID_RANGE(0, SIZE_T_MAX ,
DEFAULT(KEY_CACHE_SIZE ,
BLOCK_SIZE(IO_SIZE ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(nullptr ,
ON_UPDATE(update_buffer_size  
)
static

◆ Sys_key_cache_age_threshold

Sys_var_keycache Sys_key_cache_age_threshold("key_cache_age_threshold", "This characterizes the number of " "hits a hot block has to be untouched until it is considered aged " "enough to be downgraded to a warm block. This specifies the " "percentage ratio of that number of hits to the total number of " "blocks in key cache", KEYCACHE_VAR(param_age_threshold), CMD_LINE(REQUIRED_ARG, OPT_KEY_CACHE_AGE_THRESHOLD), VALID_RANGE(100, ULONG_MAX), DEFAULT(300), BLOCK_SIZE(100), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(update_keycache_param)) ( "key_cache_age_threshold"  ,
"This characterizes the number of " "hits a hot block has to be untouched until it is considered aged " "enough to be downgraded to a warm block. This specifies the " "percentage ratio of that number of hits to the total number of " "blocks in key cache"  ,
KEYCACHE_VAR(param_age_threshold)  ,
CMD_LINE(REQUIRED_ARG, OPT_KEY_CACHE_AGE_THRESHOLD ,
VALID_RANGE(100, ULONG_MAX)  ,
DEFAULT(300)  ,
BLOCK_SIZE(100)  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(nullptr ,
ON_UPDATE(update_keycache_param  
)
static

◆ Sys_key_cache_block_size

Sys_var_keycache Sys_key_cache_block_size("key_cache_block_size", "The default size of key cache blocks", KEYCACHE_VAR(param_block_size), CMD_LINE(REQUIRED_ARG, OPT_KEY_CACHE_BLOCK_SIZE), VALID_RANGE(512, 1024 *16), DEFAULT(KEY_CACHE_BLOCK_SIZE), BLOCK_SIZE(512), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(update_keycache_param)) ( "key_cache_block_size"  ,
"The default size of key cache blocks"  ,
KEYCACHE_VAR(param_block_size)  ,
CMD_LINE(REQUIRED_ARG, OPT_KEY_CACHE_BLOCK_SIZE ,
VALID_RANGE(512, 1024 *16)  ,
DEFAULT(KEY_CACHE_BLOCK_SIZE ,
BLOCK_SIZE(512)  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(nullptr ,
ON_UPDATE(update_keycache_param  
)
static

◆ Sys_key_cache_division_limit

Sys_var_keycache Sys_key_cache_division_limit("key_cache_division_limit", "The minimum percentage of warm blocks in key cache", KEYCACHE_VAR(param_division_limit), CMD_LINE(REQUIRED_ARG, OPT_KEY_CACHE_DIVISION_LIMIT), VALID_RANGE(1, 100), DEFAULT(100), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(update_keycache_param)) ( "key_cache_division_limit"  ,
"The minimum percentage of warm blocks in key cache"  ,
KEYCACHE_VAR(param_division_limit)  ,
CMD_LINE(REQUIRED_ARG, OPT_KEY_CACHE_DIVISION_LIMIT ,
VALID_RANGE(1, 100)  ,
DEFAULT(100)  ,
BLOCK_SIZE(1)  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(nullptr ,
ON_UPDATE(update_keycache_param  
)
static

◆ Sys_keyring_operations

Sys_var_bool Sys_keyring_operations("keyring_operations", "This variable provides access to keyring service APIs. When this " "option is disabled calls to keyring_key_generate(), keyring_key_store() " "and keyring_key_remove() will report error until this variable is " "enabled.", NON_PERSIST GLOBAL_VAR(opt_keyring_operations), NO_CMD_LINE, DEFAULT(true), &PLock_keyring_operations, NOT_IN_BINLOG, ON_CHECK(check_keyring_access), ON_UPDATE(nullptr)) ( "keyring_operations"  ,
"This variable provides access to keyring service APIs. When this " "option is disabled calls to   keyring_key_generate(),
keyring_key_store() " "and keyring_key_remove() will report error until this variable is " "enabled."  ,
NON_PERSIST   GLOBAL_VARopt_keyring_operations,
NO_CMD_LINE  ,
DEFAULT(true)  ,
PLock_keyring_operations,
NOT_IN_BINLOG  ,
ON_CHECK(check_keyring_access ,
ON_UPDATE(nullptr  
)
static

This variable provides access to keyring service APIs.

When this variable is disabled calls to keyring_key_generate(), keyring_key_store() and keyring_key_remove() will report error until this variable is enabled. This variable is protected under a mutex named PLock_keyring_operations. To access this variable you must first set this mutex.

See also
PLock_keyring_operations

◆ Sys_language

Sys_var_charptr Sys_language("lc_messages_dir", "Directory where error messages are", READ_ONLY NON_PERSIST GLOBAL_VAR(lc_messages_dir_ptr), CMD_LINE(REQUIRED_ARG, OPT_LC_MESSAGES_DIRECTORY), IN_FS_CHARSET, DEFAULT(nullptr)) ( "lc_messages_dir"  ,
"Directory where error messages are"  ,
READ_ONLY NON_PERSIST   GLOBAL_VARlc_messages_dir_ptr,
CMD_LINE(REQUIRED_ARG, OPT_LC_MESSAGES_DIRECTORY ,
IN_FS_CHARSET  ,
DEFAULT(nullptr  
)
static

◆ Sys_large_files_support

Sys_var_bool Sys_large_files_support("large_files_support", "Whether mysqld was compiled with options for large file support", READ_ONLY NON_PERSIST GLOBAL_VAR(opt_large_files), NO_CMD_LINE, DEFAULT(sizeof(my_off_t) > 4)) ( "large_files_support"  ,
"Whether mysqld was compiled with options for large file support"  ,
READ_ONLY NON_PERSIST   GLOBAL_VARopt_large_files,
NO_CMD_LINE  ,
DEFAULT(sizeof(my_off_t) > 4)   
)
static

◆ Sys_large_page_size

Sys_var_uint Sys_large_page_size("large_page_size", "If large page support is enabled, this shows the size of memory pages", READ_ONLY NON_PERSIST GLOBAL_VAR(opt_large_page_size), NO_CMD_LINE, VALID_RANGE(0, UINT_MAX), DEFAULT(0), BLOCK_SIZE(1)) ( "large_page_size"  ,
"If large page support is  enabled,
this shows the size of memory pages"  ,
READ_ONLY NON_PERSIST   GLOBAL_VARopt_large_page_size,
NO_CMD_LINE  ,
VALID_RANGE(0, UINT_MAX)  ,
DEFAULT(0)  ,
BLOCK_SIZE(1)   
)
static

◆ Sys_large_pages

Sys_var_bool Sys_large_pages("large_pages", "Enable support for large pages", READ_ONLY GLOBAL_VAR(opt_large_pages), IF_WIN(NO_CMD_LINE, CMD_LINE(OPT_ARG)), DEFAULT(false)) ( "large_pages"  ,
"Enable support for large pages"  ,
READ_ONLY   GLOBAL_VARopt_large_pages,
IF_WIN(NO_CMD_LINE, CMD_LINE(OPT_ARG))  ,
DEFAULT(false)   
)
static

◆ Sys_last_insert_id

Sys_var_session_special Sys_last_insert_id("last_insert_id", "The value to be returned from LAST_INSERT_ID()", sys_var::ONLY_SESSION, NO_CMD_LINE, VALID_RANGE(0, ULLONG_MAX), BLOCK_SIZE(1), NO_MUTEX_GUARD, IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(update_last_insert_id), ON_READ(read_last_insert_id)) ( "last_insert_id"  ,
"The value to be returned from LAST_INSERT_ID()"  ,
sys_var::ONLY_SESSION  ,
NO_CMD_LINE  ,
VALID_RANGE(0, ULLONG_MAX)  ,
BLOCK_SIZE(1)  ,
NO_MUTEX_GUARD  ,
IN_BINLOG  ,
ON_CHECK(nullptr ,
ON_UPDATE(update_last_insert_id ,
ON_READ(read_last_insert_id  
)
static

◆ Sys_lc_messages

Sys_var_struct< MY_LOCALE, Get_locale_name > Sys_lc_messages("lc_messages", "Set the language used for the error messages", SESSION_VAR(lc_messages), NO_CMD_LINE, DEFAULT(&my_default_lc_messages), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_locale)) ( "lc_messages"  ,
"Set the language used for the error messages"  ,
SESSION_VAR(lc_messages ,
NO_CMD_LINE  ,
DEFAULT &  my_default_lc_messages,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(check_locale  
)
static

◆ Sys_lc_time_names

Sys_var_struct< MY_LOCALE, Get_locale_name > Sys_lc_time_names("lc_time_names", "Set the language used for the month " "names and the days of the week", SESSION_VAR(lc_time_names), NO_CMD_LINE, DEFAULT(&my_default_lc_time_names), NO_MUTEX_GUARD, IN_BINLOG, ON_CHECK(check_locale)) ( "lc_time_names"  ,
"Set the language used for the month " "names and the days of the week"  ,
SESSION_VAR(lc_time_names)  ,
NO_CMD_LINE  ,
DEFAULT &  my_default_lc_time_names,
NO_MUTEX_GUARD  ,
IN_BINLOG  ,
ON_CHECK(check_locale  
)
static

◆ Sys_license

Sys_var_charptr Sys_license("license", "The type of license the server has", READ_ONLY NON_PERSIST GLOBAL_VAR(license), NO_CMD_LINE, IN_SYSTEM_CHARSET, DEFAULT(STRINGIFY_ARG(LICENSE))) ( "license"  ,
"The type of license the server has"  ,
READ_ONLY NON_PERSIST   GLOBAL_VARlicense,
NO_CMD_LINE  ,
IN_SYSTEM_CHARSET  ,
DEFAULT(STRINGIFY_ARG(LICENSE))   
)
static

◆ Sys_local_infile

Sys_var_bool Sys_local_infile("local_infile", "Enable LOAD DATA LOCAL INFILE", GLOBAL_VAR(opt_local_infile), CMD_LINE(OPT_ARG), DEFAULT(false)) ( "local_infile"  ,
"Enable LOAD DATA LOCAL INFILE"  ,
GLOBAL_VAR(opt_local_infile ,
CMD_LINE(OPT_ARG ,
DEFAULT(false)   
)
static

◆ Sys_lock_wait_timeout

Sys_var_ulong Sys_lock_wait_timeout("lock_wait_timeout", "Timeout in seconds to wait for a lock before returning an error.", HINT_UPDATEABLE SESSION_VAR(lock_wait_timeout), CMD_LINE(REQUIRED_ARG), VALID_RANGE(1, LONG_TIMEOUT), DEFAULT(LONG_TIMEOUT), BLOCK_SIZE(1)) ( "lock_wait_timeout"  ,
"Timeout in seconds to wait for a lock before returning an error."  ,
HINT_UPDATEABLE   SESSION_VARlock_wait_timeout,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(1, LONG_TIMEOUT ,
DEFAULT(LONG_TIMEOUT ,
BLOCK_SIZE(1)   
)
static

◆ Sys_locked_in_memory

Sys_var_bool Sys_locked_in_memory("locked_in_memory", "Whether mysqld was locked in memory with --memlock", READ_ONLY NON_PERSIST GLOBAL_VAR(locked_in_memory), NO_CMD_LINE, DEFAULT(false)) ( "locked_in_memory"  ,
"Whether mysqld was locked in memory with --memlock"  ,
READ_ONLY NON_PERSIST   GLOBAL_VARlocked_in_memory,
NO_CMD_LINE  ,
DEFAULT(false)   
)
static

◆ Sys_log_bin

Sys_var_bool Sys_log_bin("log_bin", "Whether the binary log is enabled", READ_ONLY NON_PERSIST GLOBAL_VAR(opt_bin_log), NO_CMD_LINE, DEFAULT(true)) ( "log_bin"  ,
"Whether the binary log is enabled ,
READ_ONLY NON_PERSIST   GLOBAL_VARopt_bin_log,
NO_CMD_LINE  ,
DEFAULT(true)   
)
static

◆ Sys_log_bin_basename

Sys_var_charptr Sys_log_bin_basename("log_bin_basename", "The full path of the binary log file names, excluding the extension.", READ_ONLY NON_PERSIST GLOBAL_VAR(log_bin_basename), NO_CMD_LINE, IN_FS_CHARSET, DEFAULT(nullptr)) ( "log_bin_basename"  ,
"The full path of the binary log file  names,
excluding the extension."  ,
READ_ONLY NON_PERSIST   GLOBAL_VARlog_bin_basename,
NO_CMD_LINE  ,
IN_FS_CHARSET  ,
DEFAULT(nullptr  
)
static

◆ Sys_log_binlog

Sys_var_bool Sys_log_binlog("sql_log_bin", "Controls whether logging to the binary log is done", SESSION_ONLY(sql_log_bin), NO_CMD_LINE, DEFAULT(true), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_sql_log_bin), ON_UPDATE(fix_sql_log_bin_after_update)) ( "sql_log_bin"  ,
"Controls whether logging to the binary log is done"  ,
SESSION_ONLY(sql_log_bin)  ,
NO_CMD_LINE  ,
DEFAULT(true)  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(check_sql_log_bin ,
ON_UPDATE(fix_sql_log_bin_after_update  
)
static

◆ Sys_log_error

Sys_var_charptr Sys_log_error("log_error", "Error log file", READ_ONLY NON_PERSIST GLOBAL_VAR(log_error_dest), CMD_LINE(OPT_ARG, OPT_LOG_ERROR), IN_FS_CHARSET, DEFAULT(disabled_my_option), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(nullptr), nullptr, sys_var::PARSE_EARLY) ( "log_error"  ,
"Error log file"  ,
READ_ONLY NON_PERSIST   GLOBAL_VARlog_error_dest,
CMD_LINE(OPT_ARG, OPT_LOG_ERROR ,
IN_FS_CHARSET  ,
DEFAULT(disabled_my_option ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(nullptr ,
ON_UPDATE(nullptr ,
nullptr  ,
sys_var::PARSE_EARLY   
)
static

◆ Sys_log_error_services

Sys_var_charptr Sys_log_error_services("log_error_services", "Services that should be called when an error event is received", PERSIST_AS_READONLY GLOBAL_VAR(opt_log_error_services), CMD_LINE(REQUIRED_ARG), IN_SYSTEM_CHARSET, DEFAULT(LOG_ERROR_SERVICES_DEFAULT), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_log_error_services), ON_UPDATE(fix_log_error_services), nullptr, sys_var::PARSE_EARLY) ( "log_error_services"  ,
"Services that should be called when an error event is received"  ,
PERSIST_AS_READONLY   GLOBAL_VARopt_log_error_services,
CMD_LINE(REQUIRED_ARG ,
IN_SYSTEM_CHARSET  ,
DEFAULT(LOG_ERROR_SERVICES_DEFAULT ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(check_log_error_services ,
ON_UPDATE(fix_log_error_services ,
nullptr  ,
sys_var::PARSE_EARLY   
)
static

◆ Sys_log_error_suppression_list

Sys_var_charptr Sys_log_error_suppression_list("log_error_suppression_list", "Comma-separated list of error-codes. Error messages corresponding to " "these codes will not be included in the error log. Only events with a " "severity of Warning or Information can be suppressed; events with " "System " "or Error severity will always be included. Requires the filter " "\'log_filter_internal\' to be set in @@global.log_error_services, which " "is the default.", PERSIST_AS_READONLY GLOBAL_VAR(opt_log_error_suppression_list), CMD_LINE(REQUIRED_ARG), IN_SYSTEM_CHARSET, DEFAULT(""), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_log_error_suppression_list), ON_UPDATE(fix_log_error_suppression_list)) ( "log_error_suppression_list"  ,
"Comma-separated list of error-codes. Error messages corresponding to " "these codes will not be included in the error log. Only events with a " "severity of Warning or Information can be suppressed; events with " "System " "or Error severity will always be included. Requires the filter " "\'log_filter_internal\' to be set in @@global.  log_error_services,
which " "is the default."  ,
PERSIST_AS_READONLY   GLOBAL_VARopt_log_error_suppression_list,
CMD_LINE(REQUIRED_ARG ,
IN_SYSTEM_CHARSET  ,
DEFAULT("")  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(check_log_error_suppression_list ,
ON_UPDATE(fix_log_error_suppression_list  
)
static

◆ Sys_log_error_verbosity

Sys_var_ulong Sys_log_error_verbosity("log_error_verbosity", "How detailed the error log should be. " "1, log errors only. " "2, log errors and warnings. " "3, log errors, warnings, and notes. " "Messages sent to the client are unaffected by this setting.", PERSIST_AS_READONLY GLOBAL_VAR(log_error_verbosity), CMD_LINE(REQUIRED_ARG), VALID_RANGE(1, 3), DEFAULT(2), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(update_log_error_verbosity)) ( "log_error_verbosity"  ,
"How detailed the error log should be. " "  1,
log errors only. " "  2,
log errors and warnings. " "  3,
log  errors,
warnings  ,
and notes. " "Messages sent to the client are unaffected by this setting."  ,
PERSIST_AS_READONLY   GLOBAL_VARlog_error_verbosity,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(1, 3)  ,
DEFAULT(2)  ,
BLOCK_SIZE(1)  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(nullptr ,
ON_UPDATE(update_log_error_verbosity  
)
static

◆ Sys_log_off

Sys_var_bit Sys_log_off("sql_log_off", "sql_log_off", SESSION_VAR(option_bits), NO_CMD_LINE, OPTION_LOG_OFF, DEFAULT(false), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_session_admin)) ( "sql_log_off"  ,
"sql_log_off"  ,
SESSION_VAR(option_bits)  ,
NO_CMD_LINE  ,
OPTION_LOG_OFF  ,
DEFAULT(false)  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(check_session_admin  
)
static

◆ Sys_log_output

Sys_var_set Sys_log_output("log_output", "Syntax: log-output=value[,value...], " "where \"value\" could be TABLE, FILE or NONE", GLOBAL_VAR(log_output_options), CMD_LINE(REQUIRED_ARG), log_output_names, DEFAULT(LOG_FILE), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_not_empty_set), ON_UPDATE(fix_log_output)) ( "log_output"  ,
"Syntax: log-  output = value[,value...],
" "where \"value\" could be  TABLE,
FILE or NONE"  ,
GLOBAL_VAR(log_output_options ,
CMD_LINE(REQUIRED_ARG ,
log_output_names  ,
DEFAULT(LOG_FILE ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(check_not_empty_set ,
ON_UPDATE(fix_log_output  
)
static

◆ Sys_log_queries_not_using_indexes

Sys_var_bool Sys_log_queries_not_using_indexes("log_queries_not_using_indexes", "Log queries that are executed without benefit of any index to the " "slow log if it is open", GLOBAL_VAR(opt_log_queries_not_using_indexes), CMD_LINE(OPT_ARG), DEFAULT(false)) ( "log_queries_not_using_indexes"  ,
"Log queries that are executed without benefit of any index to the " "slow log if it is open"  ,
GLOBAL_VAR(opt_log_queries_not_using_indexes ,
CMD_LINE(OPT_ARG ,
DEFAULT(false)   
)
static

◆ Sys_log_raw

Sys_var_bool Sys_log_raw("log_raw", "Log to general log before any rewriting of the query. For use in " "debugging, not production as sensitive information may be logged.", GLOBAL_VAR(opt_general_log_raw), CMD_LINE(OPT_ARG), DEFAULT(false), NO_MUTEX_GUARD, NOT_IN_BINLOG) ( "log_raw"  ,
"Log to general log before any rewriting of the query. For use in " "  debugging,
not production as sensitive information may be logged."  ,
GLOBAL_VAR(opt_general_log_raw ,
CMD_LINE(OPT_ARG ,
DEFAULT(false)  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG   
)
static

◆ Sys_log_replica_updates

Sys_var_bool Sys_log_replica_updates("log_replica_updates", "If enabled, the replication applier threads will write to this server's " "binary log.", READ_ONLY GLOBAL_VAR(opt_log_replica_updates), CMD_LINE(OPT_ARG, OPT_LOG_REPLICA_UPDATES), DEFAULT(1)) ( "log_replica_updates"  ,
"If  enabled,
the replication applier threads will write to this server 's " "binary log."  ,
READ_ONLY   GLOBAL_VARopt_log_replica_updates,
CMD_LINE(OPT_ARG, OPT_LOG_REPLICA_UPDATES ,
DEFAULT(1)   
)
static

◆ Sys_log_slave_updates

Sys_var_deprecated_alias Sys_log_slave_updates("log_slave_updates", Sys_log_replica_updates) ( "log_slave_updates"  ,
Sys_log_replica_updates   
)
static

◆ Sys_log_slow_admin_statements

Sys_var_bool Sys_log_slow_admin_statements("log_slow_admin_statements", "Log slow OPTIMIZE, ANALYZE, ALTER and other administrative statements " "to " "the slow log if it is open.", GLOBAL_VAR(opt_log_slow_admin_statements), CMD_LINE(OPT_ARG), DEFAULT(false)) ( "log_slow_admin_statements"  ,
"Log slow  OPTIMIZE,
ANALYZE  ,
ALTER and other administrative statements " "to " "the slow log if it is open."  ,
GLOBAL_VAR(opt_log_slow_admin_statements ,
CMD_LINE(OPT_ARG ,
DEFAULT(false)   
)
static

◆ Sys_log_slow_replica_statements

Sys_var_bool Sys_log_slow_replica_statements("log_slow_replica_statements", "Log slow statements executed by the replication applier threads to the " "slow log if it is open.", GLOBAL_VAR(opt_log_slow_replica_statements), CMD_LINE(OPT_ARG), DEFAULT(false)) ( "log_slow_replica_statements"  ,
"Log slow statements executed by the replication applier threads to the " "slow log if it is open."  ,
GLOBAL_VAR(opt_log_slow_replica_statements ,
CMD_LINE(OPT_ARG ,
DEFAULT(false)   
)
static

◆ Sys_log_slow_slave_statements

Sys_var_deprecated_alias Sys_log_slow_slave_statements("log_slow_slave_statements", Sys_log_slow_replica_statements) ( "log_slow_slave_statements"  ,
Sys_log_slow_replica_statements   
)
static

◆ Sys_log_statements_unsafe_for_binlog

Sys_var_bool Sys_log_statements_unsafe_for_binlog("log_statements_unsafe_for_binlog", "Log statements considered unsafe when using statement based binary " "logging. This variable is deprecated and will be removed in a " "future version.", GLOBAL_VAR(opt_log_unsafe_statements), CMD_LINE(OPT_ARG), DEFAULT(true), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(nullptr), DEPRECATED_VAR("")) ( "log_statements_unsafe_for_binlog"  ,
"Log statements considered unsafe when using statement based binary " "logging. This variable is deprecated and will be removed in a " "future version."  ,
GLOBAL_VAR(opt_log_unsafe_statements ,
CMD_LINE(OPT_ARG ,
DEFAULT(true)  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(nullptr ,
ON_UPDATE(nullptr ,
DEPRECATED_VAR("")   
)
static

◆ Sys_log_throttle_queries_not_using_indexes

Sys_var_ulong Sys_log_throttle_queries_not_using_indexes("log_throttle_queries_not_using_indexes", "Log at most this many 'not using index' warnings per minute to the " "slow log. Any further warnings will be condensed into a single " "summary line. A value of 0 disables throttling. " "Option has no effect unless --log_queries_not_using_indexes is set.", GLOBAL_VAR(opt_log_throttle_queries_not_using_indexes), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, ULONG_MAX), DEFAULT(0), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(update_log_throttle_queries_not_using_indexes)) ( "log_throttle_queries_not_using_indexes"  ,
"Log at most this many 'not using index' warnings per minute to the " "slow log. Any further warnings will be condensed into a single " "summary line. A value of 0 disables throttling. " "Option has no effect unless --log_queries_not_using_indexes is set."  ,
GLOBAL_VAR(opt_log_throttle_queries_not_using_indexes ,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(0, ULONG_MAX)  ,
DEFAULT(0)  ,
BLOCK_SIZE(1)  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(nullptr ,
ON_UPDATE(update_log_throttle_queries_not_using_indexes  
)
static

◆ Sys_log_timestamps

Sys_var_enum Sys_log_timestamps("log_timestamps", "UTC to timestamp log files in zulu time, for more concise timestamps " "and easier correlation of logs from servers from multiple time zones, " "or SYSTEM to use the system's local time. " "This affects only log files, not log tables, as the timestamp columns " "of the latter can be converted at will.", GLOBAL_VAR(opt_log_timestamps), CMD_LINE(REQUIRED_ARG), timestamp_type_names, DEFAULT(0), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(nullptr), nullptr, sys_var::PARSE_EARLY) ( "log_timestamps"  ,
"UTC to timestamp log files in zulu  time,
for more concise timestamps " "and easier correlation of logs from servers from multiple time  zones,
" "or SYSTEM to use the system 's local time. " "This affects only log  files,
not log  tables,
as the timestamp columns " "of the latter can be converted at will."  ,
GLOBAL_VAR(opt_log_timestamps ,
CMD_LINE(REQUIRED_ARG ,
timestamp_type_names  ,
DEFAULT(0)  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(nullptr ,
ON_UPDATE(nullptr ,
nullptr  ,
sys_var::PARSE_EARLY   
)
static

◆ Sys_long_query_time

Sys_var_double Sys_long_query_time("long_query_time", "Log all queries that have taken more than long_query_time seconds " "to execute to file. The argument will be treated as a decimal value " "with microsecond precision", SESSION_VAR(long_query_time_double), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, LONG_TIMEOUT), DEFAULT(10), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(update_cached_long_query_time)) ( "long_query_time"  ,
"Log all queries that have taken more than long_query_time seconds " "to execute to file. The argument will be treated as a decimal value " "with microsecond precision"  ,
SESSION_VAR(long_query_time_double)  ,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(0, LONG_TIMEOUT ,
DEFAULT(10)  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(nullptr ,
ON_UPDATE(update_cached_long_query_time  
)
static

◆ Sys_low_priority_updates

Sys_var_bool Sys_low_priority_updates("low_priority_updates", "INSERT/DELETE/UPDATE has lower priority than selects", SESSION_VAR(low_priority_updates), CMD_LINE(OPT_ARG), DEFAULT(false), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_session_admin_no_super), ON_UPDATE(fix_low_prio_updates)) ( "low_priority_updates"  ,
"INSERT/DELETE/UPDATE has lower priority than selects"  ,
SESSION_VAR(low_priority_updates)  ,
CMD_LINE(OPT_ARG ,
DEFAULT(false)  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(check_session_admin_no_super ,
ON_UPDATE(fix_low_prio_updates  
)
static

◆ Sys_lower_case_file_system

Sys_var_bool Sys_lower_case_file_system("lower_case_file_system", "Case sensitivity of file names on the file system where the " "data directory is located", READ_ONLY NON_PERSIST GLOBAL_VAR(lower_case_file_system), NO_CMD_LINE, DEFAULT(false)) ( "lower_case_file_system"  ,
"Case sensitivity of file names on the file system where the " "data directory is located"  ,
READ_ONLY NON_PERSIST   GLOBAL_VARlower_case_file_system,
NO_CMD_LINE  ,
DEFAULT(false)   
)
static

◆ Sys_lower_case_table_names

Sys_var_uint Sys_lower_case_table_names("lower_case_table_names", "If set to 1 table names are stored in lowercase on disk and table " "names will be case-insensitive. Should be set to 2 if you are using " "a case insensitive file system", READ_ONLY GLOBAL_VAR(lower_case_table_names), CMD_LINE(OPT_ARG, OPT_LOWER_CASE_TABLE_NAMES), VALID_RANGE(0, 2), DEFAULT(0), BLOCK_SIZE(1)) ( "lower_case_table_names"  ,
"If set to 1 table names are stored in lowercase on disk and table " "names will be case-insensitive. Should be set to 2 if you are using " "a case insensitive file system"  ,
READ_ONLY   GLOBAL_VARlower_case_table_names,
CMD_LINE(OPT_ARG, OPT_LOWER_CASE_TABLE_NAMES ,
VALID_RANGE(0, 2)  ,
DEFAULT(0)  ,
BLOCK_SIZE(1)   
)
static

◆ Sys_mandatory_roles

Sys_var_lexstring Sys_mandatory_roles("mandatory_roles", "All the specified roles are always considered granted to every user and " "they" " can't be revoked. Mandatory roles still require activation unless they " "are made into " "default roles. The granted roles will not be visible in the " "mysql.role_edges" " table.", GLOBAL_VAR(opt_mandatory_roles), CMD_LINE(REQUIRED_ARG), IN_SYSTEM_CHARSET, DEFAULT(""), &PLock_sys_mandatory_roles, NOT_IN_BINLOG, ON_CHECK(sysvar_check_authid_string), ON_UPDATE(sysvar_update_mandatory_roles)) ( "mandatory_roles"  ,
"All the specified roles are always considered granted to every user and " "they" " can't be revoked. Mandatory roles still require activation unless they " "are made into " "default roles. The granted roles will not be visible in the " "mysql.role_edges" " table."  ,
GLOBAL_VAR(opt_mandatory_roles ,
CMD_LINE(REQUIRED_ARG ,
IN_SYSTEM_CHARSET  ,
DEFAULT("")  ,
PLock_sys_mandatory_roles,
NOT_IN_BINLOG  ,
ON_CHECK(sysvar_check_authid_string ,
ON_UPDATE(sysvar_update_mandatory_roles  
)
static

◆ Sys_master_verify_checksum

Sys_var_deprecated_alias Sys_master_verify_checksum("master_verify_checksum", Sys_source_verify_checksum) ( "master_verify_checksum"  ,
Sys_source_verify_checksum   
)
static

◆ Sys_max_allowed_packet

Sys_var_ulong Sys_max_allowed_packet("max_allowed_packet", "Max packet length to send to or receive from the server", SESSION_VAR(max_allowed_packet), CMD_LINE(REQUIRED_ARG), VALID_RANGE(1024, 1024 *1024 *1024), DEFAULT(64 *1024 *1024), BLOCK_SIZE(1024), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_max_allowed_packet)) ( "max_allowed_packet"  ,
"Max packet length to send to or receive from the server ,
SESSION_VAR(max_allowed_packet)  ,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(1024, 1024 *1024 *1024)  ,
DEFAULT(64 *1024 *1024)  ,
BLOCK_SIZE(1024)  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(check_max_allowed_packet  
)
static

◆ Sys_max_binlog_cache_size

Sys_var_ulonglong Sys_max_binlog_cache_size("max_binlog_cache_size", "Sets the total size of the transactional cache", GLOBAL_VAR(max_binlog_cache_size), CMD_LINE(REQUIRED_ARG), VALID_RANGE(IO_SIZE, ULLONG_MAX), DEFAULT((ULLONG_MAX/IO_SIZE) *IO_SIZE), BLOCK_SIZE(IO_SIZE), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(fix_binlog_cache_size)) ( "max_binlog_cache_size"  ,
"Sets the total size of the transactional cache"  ,
GLOBAL_VAR(max_binlog_cache_size ,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(IO_SIZE, ULLONG_MAX)  ,
DEFAULT((ULLONG_MAX/IO_SIZE) *IO_SIZE ,
BLOCK_SIZE(IO_SIZE ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(nullptr ,
ON_UPDATE(fix_binlog_cache_size  
)
static

◆ Sys_max_binlog_size

Sys_var_ulong Sys_max_binlog_size("max_binlog_size", "Binary log will be rotated automatically when the size exceeds this " "value. Will also apply to relay logs if max_relay_log_size is 0", GLOBAL_VAR(max_binlog_size), CMD_LINE(REQUIRED_ARG), VALID_RANGE(IO_SIZE, 1024 *1024L *1024L), DEFAULT(1024 *1024L *1024L), BLOCK_SIZE(IO_SIZE), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(fix_max_binlog_size)) ( "max_binlog_size"  ,
"Binary log will be rotated automatically when the size exceeds this " "value. Will also apply to relay logs if max_relay_log_size is 0"  ,
GLOBAL_VAR(max_binlog_size ,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(IO_SIZE, 1024 *1024L *1024L ,
DEFAULT(1024 *1024L *1024L ,
BLOCK_SIZE(IO_SIZE ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(nullptr ,
ON_UPDATE(fix_max_binlog_size  
)
static

◆ Sys_max_binlog_stmt_cache_size

Sys_var_ulonglong Sys_max_binlog_stmt_cache_size("max_binlog_stmt_cache_size", "Sets the total size of the statement cache", GLOBAL_VAR(max_binlog_stmt_cache_size), CMD_LINE(REQUIRED_ARG), VALID_RANGE(IO_SIZE, ULLONG_MAX), DEFAULT((ULLONG_MAX/IO_SIZE) *IO_SIZE), BLOCK_SIZE(IO_SIZE), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(fix_binlog_stmt_cache_size)) ( "max_binlog_stmt_cache_size"  ,
"Sets the total size of the statement cache"  ,
GLOBAL_VAR(max_binlog_stmt_cache_size ,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(IO_SIZE, ULLONG_MAX)  ,
DEFAULT((ULLONG_MAX/IO_SIZE) *IO_SIZE ,
BLOCK_SIZE(IO_SIZE ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(nullptr ,
ON_UPDATE(fix_binlog_stmt_cache_size  
)
static

◆ Sys_max_connect_errors

Sys_var_ulong Sys_max_connect_errors("max_connect_errors", "If there is more than this number of interrupted connections from " "a host this host will be blocked from further connections", GLOBAL_VAR(max_connect_errors), CMD_LINE(REQUIRED_ARG), VALID_RANGE(1, ULONG_MAX), DEFAULT(100), BLOCK_SIZE(1)) ( "max_connect_errors"  ,
"If there is more than this number of interrupted connections from " "a host this host will be blocked from further connections ,
GLOBAL_VAR(max_connect_errors ,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(1, ULONG_MAX)  ,
DEFAULT(100)  ,
BLOCK_SIZE(1)   
)
static

◆ Sys_max_connections

Sys_var_ulong Sys_max_connections("max_connections", "The number of simultaneous clients allowed", GLOBAL_VAR(max_connections), CMD_LINE(REQUIRED_ARG), VALID_RANGE(1, 100000), DEFAULT(MAX_CONNECTIONS_DEFAULT), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(nullptr), nullptr, sys_var::PARSE_EARLY) ( "max_connections"  ,
"The number of simultaneous clients allowed"  ,
GLOBAL_VAR(max_connections ,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(1, 100000)  ,
DEFAULT(MAX_CONNECTIONS_DEFAULT ,
BLOCK_SIZE(1)  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(nullptr ,
ON_UPDATE(nullptr ,
nullptr  ,
sys_var::PARSE_EARLY   
)
static

◆ Sys_max_delayed_threads

Sys_var_ulong Sys_max_delayed_threads("max_delayed_threads", "Don't start more than this number of threads to handle INSERT " "DELAYED statements. If set to zero INSERT DELAYED will be not used. " "This variable is deprecated along with INSERT DELAYED.", SESSION_VAR(max_insert_delayed_threads), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, 16384), DEFAULT(20), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_max_delayed_threads), ON_UPDATE(nullptr), DEPRECATED_VAR("")) ( "max_delayed_threads"  ,
"Don't start more than this number of threads to handle INSERT " "DELAYED statements. If set to zero INSERT DELAYED will be not used. " "This variable is deprecated along with INSERT DELAYED."  ,
SESSION_VAR(max_insert_delayed_threads)  ,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(0, 16384)  ,
DEFAULT(20)  ,
BLOCK_SIZE(1)  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(check_max_delayed_threads ,
ON_UPDATE(nullptr ,
DEPRECATED_VAR("")   
)
static

◆ Sys_max_digest_length

Sys_var_long Sys_max_digest_length("max_digest_length", "Maximum length considered for digest text.", READ_ONLY GLOBAL_VAR(max_digest_length), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, 1024 *1024), DEFAULT(1024), BLOCK_SIZE(1)) ( "max_digest_length"  ,
"Maximum length considered for digest text."  ,
READ_ONLY   GLOBAL_VARmax_digest_length,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(0, 1024 *1024)  ,
DEFAULT(1024)  ,
BLOCK_SIZE(1)   
)
static

◆ Sys_max_error_count

Sys_var_ulong Sys_max_error_count("max_error_count", "Max number of errors/warnings to store for a statement", HINT_UPDATEABLE SESSION_VAR(max_error_count), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, 65535), DEFAULT(DEFAULT_ERROR_COUNT), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_session_admin_no_super)) ( "max_error_count"  ,
"Max number of errors/warnings to store for a statement ,
HINT_UPDATEABLE   SESSION_VARmax_error_count,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(0, 65535)  ,
DEFAULT(DEFAULT_ERROR_COUNT ,
BLOCK_SIZE(1)  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(check_session_admin_no_super  
)
static

◆ Sys_max_execution_time

Sys_var_ulong Sys_max_execution_time("max_execution_time", "Kill SELECT statement that takes over the specified number of " "milliseconds", HINT_UPDATEABLE SESSION_VAR(max_execution_time), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, ULONG_MAX), DEFAULT(0), BLOCK_SIZE(1)) ( "max_execution_time"  ,
"Kill SELECT statement that takes over the specified number of " "milliseconds"  ,
HINT_UPDATEABLE   SESSION_VARmax_execution_time,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(0, ULONG_MAX)  ,
DEFAULT(0)  ,
BLOCK_SIZE(1)   
)
static

◆ Sys_max_heap_table_size

Sys_var_ulonglong Sys_max_heap_table_size("max_heap_table_size", "Don't allow creation of heap tables bigger than this", HINT_UPDATEABLE SESSION_VAR(max_heap_table_size), CMD_LINE(REQUIRED_ARG), VALID_RANGE(16384,(ulonglong) ~(intptr) 0), DEFAULT(16 *1024 *1024), BLOCK_SIZE(1024)) ( "max_heap_table_size"  ,
"Don't allow creation of heap tables bigger than this"  ,
HINT_UPDATEABLE   SESSION_VARmax_heap_table_size,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(16384,(ulonglong) ~(intptr) 0)  ,
DEFAULT(16 *1024 *1024)  ,
BLOCK_SIZE(1024)   
)
static

◆ Sys_max_insert_delayed_threads

Sys_var_ulong Sys_max_insert_delayed_threads("max_insert_delayed_threads", "Don't start more than this number of threads to handle INSERT " "DELAYED statements. If set to zero INSERT DELAYED will be not used. " "This variable is deprecated along with INSERT DELAYED.", SESSION_VAR(max_insert_delayed_threads), NO_CMD_LINE, VALID_RANGE(0, 16384), DEFAULT(20), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_max_delayed_threads), ON_UPDATE(nullptr), DEPRECATED_VAR("")) ( "max_insert_delayed_threads"  ,
"Don't start more than this number of threads to handle INSERT " "DELAYED statements. If set to zero INSERT DELAYED will be not used. " "This variable is deprecated along with INSERT DELAYED."  ,
SESSION_VAR(max_insert_delayed_threads)  ,
NO_CMD_LINE  ,
VALID_RANGE(0, 16384)  ,
DEFAULT(20)  ,
BLOCK_SIZE(1)  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(check_max_delayed_threads ,
ON_UPDATE(nullptr ,
DEPRECATED_VAR("")   
)
static

◆ Sys_max_join_size

Sys_var_harows Sys_max_join_size("max_join_size", "Joins that are probably going to read more than max_join_size " "records return an error", HINT_UPDATEABLE SESSION_VAR(max_join_size), CMD_LINE(REQUIRED_ARG), VALID_RANGE(1, HA_POS_ERROR), DEFAULT(HA_POS_ERROR), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(fix_max_join_size)) ( "max_join_size"  ,
"Joins that are probably going to read more than max_join_size " "records return an error"  ,
HINT_UPDATEABLE   SESSION_VARmax_join_size,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(1, HA_POS_ERROR ,
DEFAULT(HA_POS_ERROR ,
BLOCK_SIZE(1)  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(nullptr ,
ON_UPDATE(fix_max_join_size  
)
static

◆ Sys_max_length_for_sort_data

Sys_var_ulong Sys_max_length_for_sort_data("max_length_for_sort_data", "This variable is deprecated and will be removed in a future release.", HINT_UPDATEABLE SESSION_VAR(max_length_for_sort_data), CMD_LINE(REQUIRED_ARG), VALID_RANGE(4, 8192 *1024L), DEFAULT(4096), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(nullptr), DEPRECATED_VAR("")) ( "max_length_for_sort_data"  ,
"This variable is deprecated and will be removed in a future release."  ,
HINT_UPDATEABLE   SESSION_VARmax_length_for_sort_data,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(4, 8192 *1024L ,
DEFAULT(4096)  ,
BLOCK_SIZE(1)  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(nullptr ,
ON_UPDATE(nullptr ,
DEPRECATED_VAR("")   
)
static

◆ Sys_max_points_in_geometry

Sys_var_ulong Sys_max_points_in_geometry("max_points_in_geometry", "Maximum number of points in a geometry", HINT_UPDATEABLE SESSION_VAR(max_points_in_geometry), CMD_LINE(OPT_ARG), VALID_RANGE(3, 1024 *1024L), DEFAULT(64 *1024), BLOCK_SIZE(1)) ( "max_points_in_geometry"  ,
"Maximum number of points in a geometry"  ,
HINT_UPDATEABLE   SESSION_VARmax_points_in_geometry,
CMD_LINE(OPT_ARG ,
VALID_RANGE(3, 1024 *1024L ,
DEFAULT(64 *1024)  ,
BLOCK_SIZE(1)   
)
static

◆ Sys_max_prepared_stmt_count

Sys_var_ulong Sys_max_prepared_stmt_count("max_prepared_stmt_count", "Maximum number of prepared statements in the server", GLOBAL_VAR(max_prepared_stmt_count), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, num_prepared_stmt_limit), DEFAULT(16382), BLOCK_SIZE(1), &PLock_prepared_stmt_count, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(nullptr), nullptr, sys_var::PARSE_EARLY) ( "max_prepared_stmt_count"  ,
"Maximum number of prepared statements in the server ,
GLOBAL_VAR(max_prepared_stmt_count ,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(0, num_prepared_stmt_limit ,
DEFAULT(16382)  ,
BLOCK_SIZE(1)  ,
PLock_prepared_stmt_count,
NOT_IN_BINLOG  ,
ON_CHECK(nullptr ,
ON_UPDATE(nullptr ,
nullptr  ,
sys_var::PARSE_EARLY   
)
static

◆ Sys_max_relay_log_size

Sys_var_ulong Sys_max_relay_log_size("max_relay_log_size", "If non-zero: relay log will be rotated automatically when the " "size exceeds this value; if zero: when the size " "exceeds max_binlog_size", GLOBAL_VAR(max_relay_log_size), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, 1024L *1024 *1024), DEFAULT(0), BLOCK_SIZE(IO_SIZE), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(fix_max_relay_log_size)) ( "max_relay_log_size"  ,
"If non-zero: relay log will be rotated automatically when the " "size exceeds this value; if zero: when the size " "exceeds max_binlog_size ,
GLOBAL_VAR(max_relay_log_size ,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(0, 1024L *1024 *1024)  ,
DEFAULT(0)  ,
BLOCK_SIZE(IO_SIZE ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(nullptr ,
ON_UPDATE(fix_max_relay_log_size  
)
static

◆ Sys_max_seeks_for_key

Sys_var_ulong Sys_max_seeks_for_key("max_seeks_for_key", "Limit assumed max number of seeks when looking up rows based on a key", HINT_UPDATEABLE SESSION_VAR(max_seeks_for_key), CMD_LINE(REQUIRED_ARG), VALID_RANGE(1, ULONG_MAX), DEFAULT(ULONG_MAX), BLOCK_SIZE(1)) ( "max_seeks_for_key"  ,
"Limit assumed max number of seeks when looking up rows based on a key ,
HINT_UPDATEABLE   SESSION_VARmax_seeks_for_key,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(1, ULONG_MAX)  ,
DEFAULT(ULONG_MAX)  ,
BLOCK_SIZE(1)   
)
static

◆ Sys_max_sort_length

Sys_var_ulong Sys_max_sort_length("max_sort_length", "The number of bytes to use when sorting long values with PAD SPACE " "collations (only the first max_sort_length bytes of each value are " "used; the rest are ignored)", HINT_UPDATEABLE SESSION_VAR(max_sort_length), CMD_LINE(REQUIRED_ARG), VALID_RANGE(4, 8192 *1024L), DEFAULT(1024), BLOCK_SIZE(1)) ( "max_sort_length"  ,
"The number of bytes to use when sorting long values with PAD SPACE " "collations (only the first max_sort_length bytes of each value are " "used; the rest are ignored)"  ,
HINT_UPDATEABLE   SESSION_VARmax_sort_length,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(4, 8192 *1024L ,
DEFAULT(1024)  ,
BLOCK_SIZE(1)   
)
static

◆ Sys_max_sp_recursion_depth

Sys_var_ulong Sys_max_sp_recursion_depth("max_sp_recursion_depth", "Maximum stored procedure recursion depth", SESSION_VAR(max_sp_recursion_depth), CMD_LINE(OPT_ARG), VALID_RANGE(0, 255), DEFAULT(0), BLOCK_SIZE(1)) ( "max_sp_recursion_depth"  ,
"Maximum stored procedure recursion depth"  ,
SESSION_VAR(max_sp_recursion_depth)  ,
CMD_LINE(OPT_ARG ,
VALID_RANGE(0, 255)  ,
DEFAULT(0)  ,
BLOCK_SIZE(1)   
)
static

◆ Sys_max_user_connections

Sys_var_max_user_conn Sys_max_user_connections("max_user_connections", "The maximum number of active connections for a single user " "(0 = no limit)", SESSION_VAR(max_user_connections), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, UINT_MAX), DEFAULT(0), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(session_readonly)) ( "max_user_connections"  ,
"The maximum number of active connections for a single user " "(0 = no limit)"  ,
SESSION_VAR(max_user_connections)  ,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(0, UINT_MAX)  ,
DEFAULT(0)  ,
BLOCK_SIZE(1)  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(session_readonly  
)
static

◆ Sys_max_write_lock_count

Sys_var_ulong Sys_max_write_lock_count("max_write_lock_count", "After this many write locks, allow some read locks to run in between", GLOBAL_VAR(max_write_lock_count), CMD_LINE(REQUIRED_ARG), VALID_RANGE(1, ULONG_MAX), DEFAULT(ULONG_MAX), BLOCK_SIZE(1)) ( "max_write_lock_count"  ,
"After this many write  locks,
allow some read locks to run in between"  ,
GLOBAL_VAR(max_write_lock_count ,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(1, ULONG_MAX)  ,
DEFAULT(ULONG_MAX)  ,
BLOCK_SIZE(1)   
)
static

◆ Sys_min_examined_row_limit

Sys_var_ulong Sys_min_examined_row_limit("min_examined_row_limit", "Don't write queries to slow log that examine fewer rows " "than that", SESSION_VAR(min_examined_row_limit), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, ULONG_MAX), DEFAULT(0), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_session_admin_no_super)) ( "min_examined_row_limit"  ,
"Don't write queries to slow log that examine fewer rows " "than that"  ,
SESSION_VAR(min_examined_row_limit)  ,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(0, ULONG_MAX)  ,
DEFAULT(0)  ,
BLOCK_SIZE(1)  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(check_session_admin_no_super  
)
static

◆ Sys_my_bind_addr

Sys_var_charptr Sys_my_bind_addr("bind_address", "IP address(es) to bind to. Syntax: address[,address]...," " where address can be an IPv4 address, IPv6 address," " host name or one of the wildcard values *, ::, 0.0.0.0." " In case more than one address is specified in a" " comma-separated list, wildcard values are not allowed." " Every address can have optional network namespace separated" " by the delimiter / from the address value. E.g., the following value" " 192.168.1.1/red,172.16.1.1/green,193.168.1.1 specifies three IP" " addresses to listen for incoming TCP connections two of that have" " to be placed in corresponding namespaces: the address 192.168.1.1" " must be placed into the namespace red and the address 172.16.1.1" " must be placed into the namespace green. Using of network namespace" " requires its support from underlying Operating System. Attempt to specify" " a network namespace for a platform that doesn't support it results in" " error during socket creation.", READ_ONLY NON_PERSIST GLOBAL_VAR(my_bind_addr_str), CMD_LINE(REQUIRED_ARG), IN_FS_CHARSET, DEFAULT(MY_BIND_ALL_ADDRESSES)) ( "bind_address"  ,
"IP address(es) to bind to. Syntax:  address...[, address],
" " where address can be an IPv4  address,
IPv6  address,
" " host name or one of the wildcard values *  ,
::  ,
0.0.0.0." " In case more than one address is specified in a" " comma-separated  list,
wildcard values are not allowed." " Every address can have optional network namespace separated" " by the delimiter/from the address value. E.  g.,
the following value" " 192.168.1.1/  red,
172.16.1.1/  green,
193.168.1.1 specifies three IP" " addresses to listen for incoming TCP connections two of that have" " to be placed in corresponding namespaces:the address 192.168.1.1" " must be placed into the namespace red and the address 172.16.1.1" " must be placed into the namespace green. Using of network namespace" " requires its support from underlying Operating System. Attempt to specify" " a network namespace for a platform that doesn 't support it results in" " error during socket creation."  ,
READ_ONLY NON_PERSIST   GLOBAL_VARmy_bind_addr_str,
CMD_LINE(REQUIRED_ARG ,
IN_FS_CHARSET  ,
DEFAULT(MY_BIND_ALL_ADDRESSES  
)
static

◆ Sys_mysql_native_password_proxy_users

Sys_var_bool Sys_mysql_native_password_proxy_users("mysql_native_password_proxy_users", "If set to FALSE (the default), then the mysql_native_password " "plugin will not signal for authenticated users to be checked for " "mapping " "to proxy users. When set to TRUE, the plugin will flag associated " "authenticated accounts to be mapped to proxy users when the server " "option " "check_proxy_users is enabled.", GLOBAL_VAR(mysql_native_password_proxy_users), CMD_LINE(OPT_ARG), DEFAULT(false)) ( "mysql_native_password_proxy_users"  ,
"If set to FALSE   the default,
then the mysql_native_password " "plugin will not signal for authenticated users to be checked for " "mapping " "to proxy users. When set to  TRUE,
the plugin will flag associated " "authenticated accounts to be mapped to proxy users when the server " "option " "check_proxy_users is enabled."  ,
GLOBAL_VAR(mysql_native_password_proxy_users ,
CMD_LINE(OPT_ARG ,
DEFAULT(false)   
)
static

◆ Sys_net_buffer_length

Sys_var_ulong Sys_net_buffer_length("net_buffer_length", "Buffer length for TCP/IP and socket communication", SESSION_VAR(net_buffer_length), CMD_LINE(REQUIRED_ARG), VALID_RANGE(1024, 1024 *1024), DEFAULT(16384), BLOCK_SIZE(1024), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_net_buffer_length)) ( "net_buffer_length"  ,
"Buffer length for TCP/IP and socket communication"  ,
SESSION_VAR(net_buffer_length)  ,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(1024, 1024 *1024)  ,
DEFAULT(16384)  ,
BLOCK_SIZE(1024)  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(check_net_buffer_length  
)
static

◆ Sys_net_read_timeout

Sys_var_ulong Sys_net_read_timeout("net_read_timeout", "Number of seconds to wait for more data from a connection before " "aborting the read", SESSION_VAR(net_read_timeout), CMD_LINE(REQUIRED_ARG), VALID_RANGE(1, LONG_TIMEOUT), DEFAULT(NET_READ_TIMEOUT), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(fix_net_read_timeout)) ( "net_read_timeout"  ,
"Number of seconds to wait for more data from a connection before " "aborting the read"  ,
SESSION_VAR(net_read_timeout)  ,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(1, LONG_TIMEOUT ,
DEFAULT(NET_READ_TIMEOUT ,
BLOCK_SIZE(1)  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(nullptr ,
ON_UPDATE(fix_net_read_timeout  
)
static

◆ Sys_net_retry_count

Sys_var_ulong Sys_net_retry_count("net_retry_count", "If a read on a communication port is interrupted, retry this " "many times before giving up", SESSION_VAR(net_retry_count), CMD_LINE(REQUIRED_ARG), VALID_RANGE(1, ULONG_MAX), DEFAULT(MYSQLD_NET_RETRY_COUNT), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(fix_net_retry_count)) ( "net_retry_count"  ,
"If a read on a communication port is  interrupted,
retry this " "many times before giving up"  ,
SESSION_VAR(net_retry_count)  ,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(1, ULONG_MAX)  ,
DEFAULT(MYSQLD_NET_RETRY_COUNT ,
BLOCK_SIZE(1)  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(nullptr ,
ON_UPDATE(fix_net_retry_count  
)
static

◆ Sys_net_wait_timeout

Sys_var_ulong Sys_net_wait_timeout("wait_timeout", "The number of seconds the server waits for activity on a " "connection before closing it", SESSION_VAR(net_wait_timeout), CMD_LINE(REQUIRED_ARG), VALID_RANGE(1, IF_WIN(INT_MAX32/1000, LONG_TIMEOUT)), DEFAULT(NET_WAIT_TIMEOUT), BLOCK_SIZE(1)) ( "wait_timeout"  ,
"The number of seconds the server waits for activity on a " "connection before closing it"  ,
SESSION_VAR(net_wait_timeout)  ,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(1, IF_WIN(INT_MAX32/1000, LONG_TIMEOUT))  ,
DEFAULT(NET_WAIT_TIMEOUT ,
BLOCK_SIZE(1)   
)
static

◆ Sys_net_write_timeout

Sys_var_ulong Sys_net_write_timeout("net_write_timeout", "Number of seconds to wait for a block to be written to a connection " "before aborting the write", SESSION_VAR(net_write_timeout), CMD_LINE(REQUIRED_ARG), VALID_RANGE(1, LONG_TIMEOUT), DEFAULT(NET_WRITE_TIMEOUT), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(fix_net_write_timeout)) ( "net_write_timeout"  ,
"Number of seconds to wait for a block to be written to a connection " "before aborting the write ,
SESSION_VAR(net_write_timeout)  ,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(1, LONG_TIMEOUT ,
DEFAULT(NET_WRITE_TIMEOUT ,
BLOCK_SIZE(1)  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(nullptr ,
ON_UPDATE(fix_net_write_timeout  
)
static

◆ Sys_offline_mode

Sys_var_bool Sys_offline_mode("offline_mode", "Make the server into offline mode", GLOBAL_VAR(offline_mode), CMD_LINE(OPT_ARG), DEFAULT(false), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_offline_mode), ON_UPDATE(handle_offline_mode)) ( "offline_mode"  ,
"Make the server into offline mode"  ,
GLOBAL_VAR(offline_mode ,
CMD_LINE(OPT_ARG ,
DEFAULT(false)  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(check_offline_mode ,
ON_UPDATE(handle_offline_mode  
)
static

◆ Sys_old_alter_table

Sys_var_bool Sys_old_alter_table("old_alter_table", "Use old, non-optimized alter table", SESSION_VAR(old_alter_table), CMD_LINE(OPT_ARG), DEFAULT(false)) ( "old_alter_table"  ,
"Use  old,
non-optimized alter table"  ,
SESSION_VAR(old_alter_table)  ,
CMD_LINE(OPT_ARG ,
DEFAULT(false)   
)
static

◆ Sys_open_files_limit

Sys_var_ulong Sys_open_files_limit("open_files_limit", "If this is not 0, then mysqld will use this value to reserve file " "descriptors to use with setrlimit(). If this value is 0 then mysqld " "will reserve max_connections*5 or max_connections + table_open_cache*2 " "(whichever is larger) number of file descriptors", READ_ONLY GLOBAL_VAR(open_files_limit), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, OS_FILE_LIMIT), DEFAULT(0), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(nullptr), nullptr, sys_var::PARSE_EARLY) ( "open_files_limit"  ,
"If this is not  0,
then mysqld will use this value to reserve file " "descriptors to use with setrlimit(). If this value is 0 then mysqld " "will reserve max_connections *5 or max_connections+table_open_cache *2 " "(whichever is larger) number of file descriptors"  ,
READ_ONLY   GLOBAL_VARopen_files_limit,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(0, OS_FILE_LIMIT ,
DEFAULT(0)  ,
BLOCK_SIZE(1)  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(nullptr ,
ON_UPDATE(nullptr ,
nullptr  ,
sys_var::PARSE_EARLY   
)
static

◆ Sys_optimizer_max_subgraph_pairs

Sys_var_ulong Sys_optimizer_max_subgraph_pairs("optimizer_max_subgraph_pairs", "Maximum depth of subgraph pairs a query can have before the " "hypergraph join optimizer starts reducing the search space " "heuristically. Larger values may result in better query plans " "for large queries, but also more time and memory spent during planning. " "Increasing this larger than the actual number of subgraph pairs " "in the query will have no further effect. " "Ignored by the old (non-hypergraph) join optimizer", HINT_UPDATEABLE SESSION_VAR(optimizer_max_subgraph_pairs), CMD_LINE(REQUIRED_ARG), VALID_RANGE(1, INT_MAX), DEFAULT(100000), BLOCK_SIZE(1)) ( "optimizer_max_subgraph_pairs"  ,
"Maximum depth of subgraph pairs a query can have before the " "hypergraph join optimizer starts reducing the search space " "heuristically. Larger values may result in better query plans " "for large  queries,
but also more time and memory spent during planning. " "Increasing this larger than the actual number of subgraph pairs " "in the query will have no further effect. " "Ignored by the old(non-hypergraph) join optimizer"  ,
HINT_UPDATEABLE   SESSION_VARoptimizer_max_subgraph_pairs,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(1, INT_MAX)  ,
DEFAULT(100000)  ,
BLOCK_SIZE(1)   
)
static

◆ Sys_optimizer_prune_level

Sys_var_ulong Sys_optimizer_prune_level("optimizer_prune_level", "Controls the heuristic(s) applied during query optimization to prune " "less-promising partial plans from the optimizer search space. " "Meaning: 0 - do not apply any heuristic, thus perform exhaustive " "search; 1 - prune plans based on number of retrieved rows", HINT_UPDATEABLE SESSION_VAR(optimizer_prune_level), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, 1), DEFAULT(1), BLOCK_SIZE(1)) ( "optimizer_prune_level"  ,
"Controls the heuristic(s) applied during query optimization to prune " "less-promising partial plans from the optimizer search space. " "Meaning: 0 - do not apply any  heuristic,
thus perform exhaustive " "search;1 - prune plans based on number of retrieved rows"  ,
HINT_UPDATEABLE   SESSION_VARoptimizer_prune_level,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(0, 1)  ,
DEFAULT(1)  ,
BLOCK_SIZE(1)   
)
static

◆ Sys_optimizer_search_depth

Sys_var_ulong Sys_optimizer_search_depth("optimizer_search_depth", "Maximum depth of search performed by the query optimizer. Values " "larger than the number of relations in a query result in better " "query plans, but take longer to compile a query. Values smaller " "than the number of tables in a relation result in faster " "optimization, but may produce very bad query plans. If set to 0, " "the system will automatically pick a reasonable value", HINT_UPDATEABLE SESSION_VAR(optimizer_search_depth), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, MAX_TABLES+1), DEFAULT(MAX_TABLES+1), BLOCK_SIZE(1)) ( "optimizer_search_depth"  ,
"Maximum depth of search performed by the query optimizer. Values " "larger than the number of relations in a query result in better " "query  plans,
but take longer to compile a query. Values smaller " "than the number of tables in a relation result in faster " "  optimization,
but may produce very bad query plans. If set to  0,
" "the system will automatically pick a reasonable value"  ,
HINT_UPDATEABLE   SESSION_VARoptimizer_search_depth,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(0, MAX_TABLES+1)  ,
DEFAULT(MAX_TABLES+1)  ,
BLOCK_SIZE(1)   
)
static

◆ Sys_optimizer_switch

Sys_var_flagset Sys_optimizer_switch("optimizer_switch", "optimizer_switch=option=val[,option=val...], where option is one of " "{index_merge, index_merge_union, index_merge_sort_union, " "index_merge_intersection, engine_condition_pushdown, " "index_condition_pushdown, mrr, mrr_cost_based" ", materialization, semijoin, loosescan, firstmatch, duplicateweedout," " subquery_materialization_cost_based, skip_scan," " block_nested_loop, batched_key_access, use_index_extensions," " condition_fanout_filter, derived_merge, hash_join," " subquery_to_derived, prefer_ordering_index," " derived_condition_pushdown, hash_set_operations} and val is one of " "{on, off, default}", HINT_UPDATEABLE SESSION_VAR(optimizer_switch), CMD_LINE(REQUIRED_ARG), optimizer_switch_names, DEFAULT(OPTIMIZER_SWITCH_DEFAULT), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_optimizer_switch), ON_UPDATE(nullptr)) ( "optimizer_switch"  ,
optimizer_switch = option=val[,option=val...],
where option is one of " "{index_merge, index_merge_union, index_merge_sort_union, " "index_merge_intersection, engine_condition_pushdown, " "index_condition_pushdown, mrr, mrr_cost_based" ", materialization, semijoin, loosescan, firstmatch, duplicateweedout," " subquery_materialization_cost_based, skip_scan," " block_nested_loop, batched_key_access, use_index_extensions," " condition_fanout_filter, derived_merge, hash_join," " subquery_to_derived, prefer_ordering_index," " derived_condition_pushdown, hash_set_operations} and val is one of " "{on, off, default}"  ,
HINT_UPDATEABLE   SESSION_VARoptimizer_switch,
CMD_LINE(REQUIRED_ARG ,
optimizer_switch_names  ,
DEFAULT(OPTIMIZER_SWITCH_DEFAULT ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(check_optimizer_switch ,
ON_UPDATE(nullptr  
)
static

◆ Sys_optimizer_trace

Sys_var_flagset Sys_optimizer_trace("optimizer_trace", "Controls tracing of the Optimizer:" " optimizer_trace=option=val[,option=val...], where option is one of" " {enabled, one_line}" " and val is one of {on, default}", SESSION_VAR(optimizer_trace), CMD_LINE(REQUIRED_ARG), Opt_trace_context::flag_names, DEFAULT(Opt_trace_context::FLAG_DEFAULT)) ( "optimizer_trace"  ,
"Controls tracing of the Optimizer:" "  optimizer_trace = option=val[,option=val...],
where option is one of" " {enabled, one_line}" " and val is one of {on, default}"  ,
SESSION_VAR(optimizer_trace)  ,
CMD_LINE(REQUIRED_ARG ,
Opt_trace_context::flag_names  ,
DEFAULT(Opt_trace_context::FLAG_DEFAULT  
)
static

◆ Sys_optimizer_trace_features

Sys_var_flagset Sys_optimizer_trace_features("optimizer_trace_features", "Enables/disables tracing of selected features of the Optimizer:" " optimizer_trace_features=option=val[,option=val...], where option is " "one " "of" " {greedy_search, range_optimizer, dynamic_range, repeated_subselect}" " and val is one of {on, off, default}", SESSION_VAR(optimizer_trace_features), CMD_LINE(REQUIRED_ARG), Opt_trace_context::feature_names, DEFAULT(Opt_trace_context::default_features)) ( "optimizer_trace_features"  ,
"Enables/disables tracing of selected features of the Optimizer:" "  optimizer_trace_features = option=val[,option=val...],
where option is " "one " "of" " {greedy_search, range_optimizer, dynamic_range, repeated_subselect}" " and val is one of {on, off, default}"  ,
SESSION_VAR(optimizer_trace_features)  ,
CMD_LINE(REQUIRED_ARG ,
Opt_trace_context::feature_names  ,
DEFAULT(Opt_trace_context::default_features  
)
static

Note how "misc" is not here: it is not accessible to the user; disabling "misc" would disable the top object, which would make an empty trace.

◆ Sys_optimizer_trace_limit

Sys_var_long Sys_optimizer_trace_limit("optimizer_trace_limit", "Maximum number of shown optimizer traces", SESSION_VAR(optimizer_trace_limit), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, LONG_MAX), DEFAULT(1), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(optimizer_trace_update)) ( "optimizer_trace_limit"  ,
"Maximum number of shown optimizer traces"  ,
SESSION_VAR(optimizer_trace_limit)  ,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(0, LONG_MAX)  ,
DEFAULT(1)  ,
BLOCK_SIZE(1)  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(nullptr ,
ON_UPDATE(optimizer_trace_update  
)
static

◆ Sys_optimizer_trace_max_mem_size

Sys_var_ulong Sys_optimizer_trace_max_mem_size("optimizer_trace_max_mem_size", "Maximum allowed cumulated size of stored optimizer traces", SESSION_VAR(optimizer_trace_max_mem_size), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, ULONG_MAX), DEFAULT(1024 *1024), BLOCK_SIZE(1)) ( "optimizer_trace_max_mem_size"  ,
"Maximum allowed cumulated size of stored optimizer traces"  ,
SESSION_VAR(optimizer_trace_max_mem_size)  ,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(0, ULONG_MAX)  ,
DEFAULT(1024 *1024)  ,
BLOCK_SIZE(1)   
)
static

◆ Sys_optimizer_trace_offset

Sys_var_long Sys_optimizer_trace_offset("optimizer_trace_offset", "Offset of first optimizer trace to show; see manual", SESSION_VAR(optimizer_trace_offset), CMD_LINE(REQUIRED_ARG), VALID_RANGE(LONG_MIN, LONG_MAX), DEFAULT(-1), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(optimizer_trace_update)) ( "optimizer_trace_offset"  ,
"Offset of first optimizer trace to show; see manual"  ,
SESSION_VAR(optimizer_trace_offset)  ,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(LONG_MIN, LONG_MAX)  ,
DEFAULT(-1)  ,
BLOCK_SIZE(1)  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(nullptr ,
ON_UPDATE(optimizer_trace_update  
)
static

◆ Sys_optimizer_trace_ptr

export sys_var* Sys_optimizer_trace_ptr = &Sys_optimizer_trace

◆ Sys_original_server_version

Sys_var_uint Sys_original_server_version("original_server_version", "The version of the server where the transaction was originally executed", SESSION_ONLY(original_server_version), NO_CMD_LINE, VALID_RANGE(0, UNDEFINED_SERVER_VERSION), DEFAULT(UNDEFINED_SERVER_VERSION), BLOCK_SIZE(1), NO_MUTEX_GUARD, IN_BINLOG, ON_CHECK(check_session_admin_or_replication_applier)) ( "original_server_version"  ,
"The version of the server where the transaction was originally executed"  ,
SESSION_ONLY(original_server_version)  ,
NO_CMD_LINE  ,
VALID_RANGE(0, UNDEFINED_SERVER_VERSION ,
DEFAULT(UNDEFINED_SERVER_VERSION ,
BLOCK_SIZE(1)  ,
NO_MUTEX_GUARD  ,
IN_BINLOG  ,
ON_CHECK(check_session_admin_or_replication_applier  
)
static

◆ Sys_parser_max_mem_size

Sys_var_ulonglong Sys_parser_max_mem_size("parser_max_mem_size", "Maximum amount of memory available to the parser", SESSION_VAR(parser_max_mem_size), CMD_LINE(REQUIRED_ARG), VALID_RANGE(10 *1000 *1000, max_mem_sz), DEFAULT(max_mem_sz), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(limit_parser_max_mem_size), ON_UPDATE(nullptr)) ( "parser_max_mem_size"  ,
"Maximum amount of memory available to the parser ,
SESSION_VAR(parser_max_mem_size)  ,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(10 *1000 *1000, max_mem_sz ,
DEFAULT(max_mem_sz ,
BLOCK_SIZE(1)  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(limit_parser_max_mem_size ,
ON_UPDATE(nullptr  
)
static

◆ Sys_partial_revokes

Sys_var_bool Sys_partial_revokes("partial_revokes", "Access of database objects can be restricted, " "even if user has global privileges granted.", GLOBAL_VAR(opt_partial_revokes), CMD_LINE(OPT_ARG), DEFAULT(DEFAULT_PARTIAL_REVOKES), &Plock_partial_revokes, IN_BINLOG, ON_CHECK(check_partial_revokes), ON_UPDATE(partial_revokes_update), nullptr, sys_var::PARSE_EARLY) ( "partial_revokes"  ,
"Access of database objects can be  restricted,
" "even if user has global privileges granted."  ,
GLOBAL_VAR(opt_partial_revokes ,
CMD_LINE(OPT_ARG ,
DEFAULT(DEFAULT_PARTIAL_REVOKES ,
Plock_partial_revokes,
IN_BINLOG  ,
ON_CHECK(check_partial_revokes ,
ON_UPDATE(partial_revokes_update ,
nullptr  ,
sys_var::PARSE_EARLY   
)
static

◆ Sys_password_history

Sys_var_uint Sys_password_history("password_history", "The number of old passwords to check in the history." " Set to 0 (the default) to turn the checks off", GLOBAL_VAR(global_password_history), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, UINT_MAX32), DEFAULT(0), BLOCK_SIZE(1), &plock_sys_password_history) ( "password_history"  ,
"The number of old passwords to check in the history." " Set to 0 (the default) to turn the checks off"  ,
GLOBAL_VAR(global_password_history ,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(0, UINT_MAX32 ,
DEFAULT(0)  ,
BLOCK_SIZE(1)  ,
plock_sys_password_history 
)
static

◆ Sys_password_require_current

Sys_var_bool Sys_password_require_current("password_require_current", "Current password is needed to be specified in order to change it", GLOBAL_VAR(password_require_current), CMD_LINE(OPT_ARG), DEFAULT(false)) ( "password_require_current"  ,
"Current password is needed to be specified in order to change it"  ,
GLOBAL_VAR(password_require_current ,
CMD_LINE(OPT_ARG ,
DEFAULT(false)   
)
static

◆ Sys_password_reuse_interval

Sys_var_uint Sys_password_reuse_interval("password_reuse_interval", "The minimum number of days that need to pass before a password can " "be reused. Set to 0 (the default) to turn the checks off", GLOBAL_VAR(global_password_reuse_interval), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, UINT_MAX32), DEFAULT(0), BLOCK_SIZE(1), &plock_sys_password_reuse_interval) ( "password_reuse_interval"  ,
"The minimum number of days that need to pass before a password can " "be reused. Set to 0 (the default) to turn the checks off"  ,
GLOBAL_VAR(global_password_reuse_interval ,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(0, UINT_MAX32 ,
DEFAULT(0)  ,
BLOCK_SIZE(1)  ,
plock_sys_password_reuse_interval 
)
static

◆ Sys_persist_sensitive_variables_in_plaintext

Sys_var_bool Sys_persist_sensitive_variables_in_plaintext("persist_sensitive_variables_in_plaintext", "If set to FALSE, server will refuse to persist SENSITIVE variables in " "plaintext and refuse to start if encrypted part of persited file cannot " "be processed.", READ_ONLY NON_PERSIST GLOBAL_VAR(opt_persist_sensitive_variables_in_plaintext), CMD_LINE(OPT_ARG), DEFAULT(true), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(nullptr), nullptr, sys_var::PARSE_EARLY) ( "persist_sensitive_variables_in_plaintext"  ,
"If set to  FALSE,
server will refuse to persist SENSITIVE variables in " "plaintext and refuse to start if encrypted part of persited file cannot " "be processed."  ,
READ_ONLY NON_PERSIST   GLOBAL_VARopt_persist_sensitive_variables_in_plaintext,
CMD_LINE(OPT_ARG ,
DEFAULT(true)  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(nullptr ,
ON_UPDATE(nullptr ,
nullptr  ,
sys_var::PARSE_EARLY   
)
static

◆ Sys_pfs_accounts_size

Sys_var_long Sys_pfs_accounts_size("performance_schema_accounts_size", "Maximum number of instrumented user@host accounts." " Use 0 to disable, -1 for automated scaling.", READ_ONLY GLOBAL_VAR(pfs_param.m_account_sizing), CMD_LINE(REQUIRED_ARG), VALID_RANGE(-1, 1024 *1024), DEFAULT(PFS_AUTOSCALE_VALUE), BLOCK_SIZE(1), PFS_TRAILING_PROPERTIES) ( "performance_schema_accounts_size"  ,
"Maximum number of instrumented user@host accounts." " Use 0 to  disable,
-1 for automated scaling."  ,
READ_ONLY   GLOBAL_VARpfs_param.m_account_sizing,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(-1, 1024 *1024)  ,
DEFAULT(PFS_AUTOSCALE_VALUE ,
BLOCK_SIZE(1)  ,
PFS_TRAILING_PROPERTIES   
)
static

◆ Sys_pfs_connect_attrs_size

Sys_var_long Sys_pfs_connect_attrs_size("performance_schema_session_connect_attrs_size", "Size of session attribute string buffer per thread." " Use 0 to disable, -1 for automated sizing.", READ_ONLY GLOBAL_VAR(pfs_param.m_session_connect_attrs_sizing), CMD_LINE(REQUIRED_ARG), VALID_RANGE(-1, 1024 *1024), DEFAULT(PFS_AUTOSIZE_VALUE), BLOCK_SIZE(1), PFS_TRAILING_PROPERTIES) ( "performance_schema_session_connect_attrs_size"  ,
"Size of session attribute string buffer per thread." " Use 0 to  disable,
-1 for automated sizing."  ,
READ_ONLY   GLOBAL_VARpfs_param.m_session_connect_attrs_sizing,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(-1, 1024 *1024)  ,
DEFAULT(PFS_AUTOSIZE_VALUE ,
BLOCK_SIZE(1)  ,
PFS_TRAILING_PROPERTIES   
)
static

◆ Sys_pfs_consumer_events_stages_current

Sys_var_bool Sys_pfs_consumer_events_stages_current("performance_schema_consumer_events_stages_current", "Default startup value for the events_stages_current consumer.", READ_ONLY NOT_VISIBLE GLOBAL_VAR(pfs_param.m_consumer_events_stages_current_enabled), CMD_LINE(OPT_ARG), DEFAULT(false), PFS_TRAILING_PROPERTIES) ( "performance_schema_consumer_events_stages_current"  ,
"Default startup value for the events_stages_current consumer."  ,
READ_ONLY NOT_VISIBLE   GLOBAL_VARpfs_param.m_consumer_events_stages_current_enabled,
CMD_LINE(OPT_ARG ,
DEFAULT(false)  ,
PFS_TRAILING_PROPERTIES   
)
static

◆ Sys_pfs_consumer_events_stages_history

Sys_var_bool Sys_pfs_consumer_events_stages_history("performance_schema_consumer_events_stages_history", "Default startup value for the events_stages_history consumer.", READ_ONLY NOT_VISIBLE GLOBAL_VAR(pfs_param.m_consumer_events_stages_history_enabled), CMD_LINE(OPT_ARG), DEFAULT(false), PFS_TRAILING_PROPERTIES) ( "performance_schema_consumer_events_stages_history"  ,
"Default startup value for the events_stages_history consumer."  ,
READ_ONLY NOT_VISIBLE   GLOBAL_VARpfs_param.m_consumer_events_stages_history_enabled,
CMD_LINE(OPT_ARG ,
DEFAULT(false)  ,
PFS_TRAILING_PROPERTIES   
)
static

◆ Sys_pfs_consumer_events_stages_history_long

Sys_var_bool Sys_pfs_consumer_events_stages_history_long("performance_schema_consumer_events_stages_history_long", "Default startup value for the events_stages_history_long consumer.", READ_ONLY NOT_VISIBLE GLOBAL_VAR(pfs_param.m_consumer_events_stages_history_long_enabled), CMD_LINE(OPT_ARG), DEFAULT(false), PFS_TRAILING_PROPERTIES) ( "performance_schema_consumer_events_stages_history_long"  ,
"Default startup value for the events_stages_history_long consumer."  ,
READ_ONLY NOT_VISIBLE   GLOBAL_VARpfs_param.m_consumer_events_stages_history_long_enabled,
CMD_LINE(OPT_ARG ,
DEFAULT(false)  ,
PFS_TRAILING_PROPERTIES   
)
static

◆ Sys_pfs_consumer_events_statements_cpu

Sys_var_bool Sys_pfs_consumer_events_statements_cpu("performance_schema_consumer_events_statements_cpu", "Default startup value for the events_statements_cpu consumer.", READ_ONLY NOT_VISIBLE GLOBAL_VAR(pfs_param.m_consumer_events_statements_cpu_enabled), CMD_LINE(OPT_ARG), DEFAULT(false), PFS_TRAILING_PROPERTIES) ( "performance_schema_consumer_events_statements_cpu"  ,
"Default startup value for the events_statements_cpu consumer."  ,
READ_ONLY NOT_VISIBLE   GLOBAL_VARpfs_param.m_consumer_events_statements_cpu_enabled,
CMD_LINE(OPT_ARG ,
DEFAULT(false)  ,
PFS_TRAILING_PROPERTIES   
)
static

◆ Sys_pfs_consumer_events_statements_current

Sys_var_bool Sys_pfs_consumer_events_statements_current("performance_schema_consumer_events_statements_current", "Default startup value for the events_statements_current consumer.", READ_ONLY NOT_VISIBLE GLOBAL_VAR(pfs_param.m_consumer_events_statements_current_enabled), CMD_LINE(OPT_ARG), DEFAULT(true), PFS_TRAILING_PROPERTIES) ( "performance_schema_consumer_events_statements_current"  ,
"Default startup value for the events_statements_current consumer."  ,
READ_ONLY NOT_VISIBLE   GLOBAL_VARpfs_param.m_consumer_events_statements_current_enabled,
CMD_LINE(OPT_ARG ,
DEFAULT(true)  ,
PFS_TRAILING_PROPERTIES   
)
static

◆ Sys_pfs_consumer_events_statements_history

Sys_var_bool Sys_pfs_consumer_events_statements_history("performance_schema_consumer_events_statements_history", "Default startup value for the events_statements_history consumer.", READ_ONLY NOT_VISIBLE GLOBAL_VAR(pfs_param.m_consumer_events_statements_history_enabled), CMD_LINE(OPT_ARG), DEFAULT(true), PFS_TRAILING_PROPERTIES) ( "performance_schema_consumer_events_statements_history"  ,
"Default startup value for the events_statements_history consumer."  ,
READ_ONLY NOT_VISIBLE   GLOBAL_VARpfs_param.m_consumer_events_statements_history_enabled,
CMD_LINE(OPT_ARG ,
DEFAULT(true)  ,
PFS_TRAILING_PROPERTIES   
)
static

◆ Sys_pfs_consumer_events_statements_history_long

Sys_var_bool Sys_pfs_consumer_events_statements_history_long("performance_schema_consumer_events_statements_history_long", "Default startup value for the events_statements_history_long consumer.", READ_ONLY NOT_VISIBLE GLOBAL_VAR(pfs_param.m_consumer_events_statements_history_long_enabled), CMD_LINE(OPT_ARG), DEFAULT(false), PFS_TRAILING_PROPERTIES) ( "performance_schema_consumer_events_statements_history_long"  ,
"Default startup value for the events_statements_history_long consumer."  ,
READ_ONLY NOT_VISIBLE   GLOBAL_VARpfs_param.m_consumer_events_statements_history_long_enabled,
CMD_LINE(OPT_ARG ,
DEFAULT(false)  ,
PFS_TRAILING_PROPERTIES   
)
static

◆ Sys_pfs_consumer_events_transactions_current

Sys_var_bool Sys_pfs_consumer_events_transactions_current("performance_schema_consumer_events_transactions_current", "Default startup value for the events_transactions_current consumer.", READ_ONLY NOT_VISIBLE GLOBAL_VAR(pfs_param.m_consumer_events_transactions_current_enabled), CMD_LINE(OPT_ARG), DEFAULT(true), PFS_TRAILING_PROPERTIES) ( "performance_schema_consumer_events_transactions_current"  ,
"Default startup value for the events_transactions_current consumer."  ,
READ_ONLY NOT_VISIBLE   GLOBAL_VARpfs_param.m_consumer_events_transactions_current_enabled,
CMD_LINE(OPT_ARG ,
DEFAULT(true)  ,
PFS_TRAILING_PROPERTIES   
)
static

◆ Sys_pfs_consumer_events_transactions_history

Sys_var_bool Sys_pfs_consumer_events_transactions_history("performance_schema_consumer_events_transactions_history", "Default startup value for the events_transactions_history consumer.", READ_ONLY NOT_VISIBLE GLOBAL_VAR(pfs_param.m_consumer_events_transactions_history_enabled), CMD_LINE(OPT_ARG), DEFAULT(true), PFS_TRAILING_PROPERTIES) ( "performance_schema_consumer_events_transactions_history"  ,
"Default startup value for the events_transactions_history consumer."  ,
READ_ONLY NOT_VISIBLE   GLOBAL_VARpfs_param.m_consumer_events_transactions_history_enabled,
CMD_LINE(OPT_ARG ,
DEFAULT(true)  ,
PFS_TRAILING_PROPERTIES   
)
static

◆ Sys_pfs_consumer_events_transactions_history_long

Sys_var_bool Sys_pfs_consumer_events_transactions_history_long("performance_schema_consumer_events_transactions_history_long", "Default startup value for the events_transactions_history_long consumer.", READ_ONLY NOT_VISIBLE GLOBAL_VAR( pfs_param.m_consumer_events_transactions_history_long_enabled), CMD_LINE(OPT_ARG), DEFAULT(false), PFS_TRAILING_PROPERTIES) ( "performance_schema_consumer_events_transactions_history_long"  ,
"Default startup value for the events_transactions_history_long consumer."  ,
READ_ONLY NOT_VISIBLE   GLOBAL_VAR pfs_param.m_consumer_events_transactions_history_long_enabled,
CMD_LINE(OPT_ARG ,
DEFAULT(false)  ,
PFS_TRAILING_PROPERTIES   
)
static

◆ Sys_pfs_consumer_events_waits_current

Sys_var_bool Sys_pfs_consumer_events_waits_current("performance_schema_consumer_events_waits_current", "Default startup value for the events_waits_current consumer.", READ_ONLY NOT_VISIBLE GLOBAL_VAR(pfs_param.m_consumer_events_waits_current_enabled), CMD_LINE(OPT_ARG), DEFAULT(false), PFS_TRAILING_PROPERTIES) ( "performance_schema_consumer_events_waits_current"  ,
"Default startup value for the events_waits_current consumer."  ,
READ_ONLY NOT_VISIBLE   GLOBAL_VARpfs_param.m_consumer_events_waits_current_enabled,
CMD_LINE(OPT_ARG ,
DEFAULT(false)  ,
PFS_TRAILING_PROPERTIES   
)
static

◆ Sys_pfs_consumer_events_waits_history

Sys_var_bool Sys_pfs_consumer_events_waits_history("performance_schema_consumer_events_waits_history", "Default startup value for the events_waits_history consumer.", READ_ONLY NOT_VISIBLE GLOBAL_VAR(pfs_param.m_consumer_events_waits_history_enabled), CMD_LINE(OPT_ARG), DEFAULT(false), PFS_TRAILING_PROPERTIES) ( "performance_schema_consumer_events_waits_history"  ,
"Default startup value for the events_waits_history consumer."  ,
READ_ONLY NOT_VISIBLE   GLOBAL_VARpfs_param.m_consumer_events_waits_history_enabled,
CMD_LINE(OPT_ARG ,
DEFAULT(false)  ,
PFS_TRAILING_PROPERTIES   
)
static

◆ Sys_pfs_consumer_events_waits_history_long

Sys_var_bool Sys_pfs_consumer_events_waits_history_long("performance_schema_consumer_events_waits_history_long", "Default startup value for the events_waits_history_long consumer.", READ_ONLY NOT_VISIBLE GLOBAL_VAR(pfs_param.m_consumer_events_waits_history_long_enabled), CMD_LINE(OPT_ARG), DEFAULT(false), PFS_TRAILING_PROPERTIES) ( "performance_schema_consumer_events_waits_history_long"  ,
"Default startup value for the events_waits_history_long consumer."  ,
READ_ONLY NOT_VISIBLE   GLOBAL_VARpfs_param.m_consumer_events_waits_history_long_enabled,
CMD_LINE(OPT_ARG ,
DEFAULT(false)  ,
PFS_TRAILING_PROPERTIES   
)
static

◆ Sys_pfs_consumer_global_instrumentation

Sys_var_bool Sys_pfs_consumer_global_instrumentation("performance_schema_consumer_global_instrumentation", "Default startup value for the global_instrumentation consumer.", READ_ONLY NOT_VISIBLE GLOBAL_VAR(pfs_param.m_consumer_global_instrumentation_enabled), CMD_LINE(OPT_ARG), DEFAULT(true), PFS_TRAILING_PROPERTIES) ( "performance_schema_consumer_global_instrumentation"  ,
"Default startup value for the global_instrumentation consumer."  ,
READ_ONLY NOT_VISIBLE   GLOBAL_VARpfs_param.m_consumer_global_instrumentation_enabled,
CMD_LINE(OPT_ARG ,
DEFAULT(true)  ,
PFS_TRAILING_PROPERTIES   
)
static

◆ Sys_pfs_consumer_statement_digest

Sys_var_bool Sys_pfs_consumer_statement_digest("performance_schema_consumer_statements_digest", "Default startup value for the statements_digest consumer.", READ_ONLY NOT_VISIBLE GLOBAL_VAR(pfs_param.m_consumer_statement_digest_enabled), CMD_LINE(OPT_ARG), DEFAULT(true), PFS_TRAILING_PROPERTIES) ( "performance_schema_consumer_statements_digest"  ,
"Default startup value for the statements_digest consumer."  ,
READ_ONLY NOT_VISIBLE   GLOBAL_VARpfs_param.m_consumer_statement_digest_enabled,
CMD_LINE(OPT_ARG ,
DEFAULT(true)  ,
PFS_TRAILING_PROPERTIES   
)
static

◆ Sys_pfs_consumer_thread_instrumentation

Sys_var_bool Sys_pfs_consumer_thread_instrumentation("performance_schema_consumer_thread_instrumentation", "Default startup value for the thread_instrumentation consumer.", READ_ONLY NOT_VISIBLE GLOBAL_VAR(pfs_param.m_consumer_thread_instrumentation_enabled), CMD_LINE(OPT_ARG), DEFAULT(true), PFS_TRAILING_PROPERTIES) ( "performance_schema_consumer_thread_instrumentation"  ,
"Default startup value for the thread_instrumentation consumer."  ,
READ_ONLY NOT_VISIBLE   GLOBAL_VARpfs_param.m_consumer_thread_instrumentation_enabled,
CMD_LINE(OPT_ARG ,
DEFAULT(true)  ,
PFS_TRAILING_PROPERTIES   
)
static

◆ Sys_pfs_digest_size

Sys_var_long Sys_pfs_digest_size("performance_schema_digests_size", "Size of the statement digest." " Use 0 to disable, -1 for automated sizing.", READ_ONLY GLOBAL_VAR(pfs_param.m_digest_sizing), CMD_LINE(REQUIRED_ARG), VALID_RANGE(-1, 1024 *1024), DEFAULT(PFS_AUTOSIZE_VALUE), BLOCK_SIZE(1), PFS_TRAILING_PROPERTIES) ( "performance_schema_digests_size"  ,
"Size of the statement digest." " Use 0 to  disable,
-1 for automated sizing."  ,
READ_ONLY   GLOBAL_VARpfs_param.m_digest_sizing,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(-1, 1024 *1024)  ,
DEFAULT(PFS_AUTOSIZE_VALUE ,
BLOCK_SIZE(1)  ,
PFS_TRAILING_PROPERTIES   
)
static

◆ Sys_pfs_enabled

Sys_var_bool Sys_pfs_enabled("performance_schema", "Enable the performance schema.", READ_ONLY GLOBAL_VAR(pfs_param.m_enabled), CMD_LINE(OPT_ARG), DEFAULT(true), PFS_TRAILING_PROPERTIES) ( "performance_schema"  ,
"Enable the performance schema."  ,
READ_ONLY   GLOBAL_VARpfs_param.m_enabled,
CMD_LINE(OPT_ARG ,
DEFAULT(true)  ,
PFS_TRAILING_PROPERTIES   
)
static

◆ Sys_pfs_error_size

Sys_var_long Sys_pfs_error_size("performance_schema_error_size", "Number of server errors instrumented.", READ_ONLY GLOBAL_VAR(pfs_param.m_error_sizing), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, 1024 *1024), DEFAULT(PFS_MAX_GLOBAL_SERVER_ERRORS), BLOCK_SIZE(1), PFS_TRAILING_PROPERTIES) ( "performance_schema_error_size"  ,
"Number of server errors instrumented."  ,
READ_ONLY   GLOBAL_VARpfs_param.m_error_sizing,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(0, 1024 *1024)  ,
DEFAULT(PFS_MAX_GLOBAL_SERVER_ERRORS ,
BLOCK_SIZE(1)  ,
PFS_TRAILING_PROPERTIES   
)
static

◆ Sys_pfs_events_stages_history_long_size

Sys_var_long Sys_pfs_events_stages_history_long_size("performance_schema_events_stages_history_long_size", "Number of rows in EVENTS_STAGES_HISTORY_LONG." " Use 0 to disable, -1 for automated sizing.", READ_ONLY GLOBAL_VAR(pfs_param.m_events_stages_history_long_sizing), CMD_LINE(REQUIRED_ARG), VALID_RANGE(-1, 1024 *1024), DEFAULT(PFS_AUTOSIZE_VALUE), BLOCK_SIZE(1), PFS_TRAILING_PROPERTIES) ( "performance_schema_events_stages_history_long_size"  ,
"Number of rows in EVENTS_STAGES_HISTORY_LONG." " Use 0 to  disable,
-1 for automated sizing."  ,
READ_ONLY   GLOBAL_VARpfs_param.m_events_stages_history_long_sizing,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(-1, 1024 *1024)  ,
DEFAULT(PFS_AUTOSIZE_VALUE ,
BLOCK_SIZE(1)  ,
PFS_TRAILING_PROPERTIES   
)
static

◆ Sys_pfs_events_stages_history_size

Sys_var_long Sys_pfs_events_stages_history_size("performance_schema_events_stages_history_size", "Number of rows per thread in EVENTS_STAGES_HISTORY." " Use 0 to disable, -1 for automated sizing.", READ_ONLY GLOBAL_VAR(pfs_param.m_events_stages_history_sizing), CMD_LINE(REQUIRED_ARG), VALID_RANGE(-1, 1024), DEFAULT(PFS_AUTOSIZE_VALUE), BLOCK_SIZE(1), PFS_TRAILING_PROPERTIES) ( "performance_schema_events_stages_history_size"  ,
"Number of rows per thread in EVENTS_STAGES_HISTORY." " Use 0 to  disable,
-1 for automated sizing."  ,
READ_ONLY   GLOBAL_VARpfs_param.m_events_stages_history_sizing,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(-1, 1024)  ,
DEFAULT(PFS_AUTOSIZE_VALUE ,
BLOCK_SIZE(1)  ,
PFS_TRAILING_PROPERTIES   
)
static

◆ Sys_pfs_events_statements_history_long_size

Sys_var_long Sys_pfs_events_statements_history_long_size("performance_schema_events_statements_history_long_size", "Number of rows in EVENTS_STATEMENTS_HISTORY_LONG." " Use 0 to disable, -1 for automated sizing.", READ_ONLY GLOBAL_VAR(pfs_param.m_events_statements_history_long_sizing), CMD_LINE(REQUIRED_ARG), VALID_RANGE(-1, 1024 *1024), DEFAULT(PFS_AUTOSIZE_VALUE), BLOCK_SIZE(1), PFS_TRAILING_PROPERTIES) ( "performance_schema_events_statements_history_long_size"  ,
"Number of rows in EVENTS_STATEMENTS_HISTORY_LONG." " Use 0 to  disable,
-1 for automated sizing."  ,
READ_ONLY   GLOBAL_VARpfs_param.m_events_statements_history_long_sizing,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(-1, 1024 *1024)  ,
DEFAULT(PFS_AUTOSIZE_VALUE ,
BLOCK_SIZE(1)  ,
PFS_TRAILING_PROPERTIES   
)
static

◆ Sys_pfs_events_statements_history_size

Sys_var_long Sys_pfs_events_statements_history_size("performance_schema_events_statements_history_size", "Number of rows per thread in EVENTS_STATEMENTS_HISTORY." " Use 0 to disable, -1 for automated sizing.", READ_ONLY GLOBAL_VAR(pfs_param.m_events_statements_history_sizing), CMD_LINE(REQUIRED_ARG), VALID_RANGE(-1, 1024), DEFAULT(PFS_AUTOSIZE_VALUE), BLOCK_SIZE(1), PFS_TRAILING_PROPERTIES) ( "performance_schema_events_statements_history_size"  ,
"Number of rows per thread in EVENTS_STATEMENTS_HISTORY." " Use 0 to  disable,
-1 for automated sizing."  ,
READ_ONLY   GLOBAL_VARpfs_param.m_events_statements_history_sizing,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(-1, 1024)  ,
DEFAULT(PFS_AUTOSIZE_VALUE ,
BLOCK_SIZE(1)  ,
PFS_TRAILING_PROPERTIES   
)
static

◆ Sys_pfs_events_transactions_history_long_size

Sys_var_long Sys_pfs_events_transactions_history_long_size("performance_schema_events_transactions_history_long_size", "Number of rows in EVENTS_TRANSACTIONS_HISTORY_LONG." " Use 0 to disable, -1 for automated sizing.", READ_ONLY GLOBAL_VAR(pfs_param.m_events_transactions_history_long_sizing), CMD_LINE(REQUIRED_ARG), VALID_RANGE(-1, 1024 *1024), DEFAULT(PFS_AUTOSIZE_VALUE), BLOCK_SIZE(1), PFS_TRAILING_PROPERTIES) ( "performance_schema_events_transactions_history_long_size"  ,
"Number of rows in EVENTS_TRANSACTIONS_HISTORY_LONG." " Use 0 to  disable,
-1 for automated sizing."  ,
READ_ONLY   GLOBAL_VARpfs_param.m_events_transactions_history_long_sizing,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(-1, 1024 *1024)  ,
DEFAULT(PFS_AUTOSIZE_VALUE ,
BLOCK_SIZE(1)  ,
PFS_TRAILING_PROPERTIES   
)
static

◆ Sys_pfs_events_transactions_history_size

Sys_var_long Sys_pfs_events_transactions_history_size("performance_schema_events_transactions_history_size", "Number of rows per thread in EVENTS_TRANSACTIONS_HISTORY." " Use 0 to disable, -1 for automated sizing.", READ_ONLY GLOBAL_VAR(pfs_param.m_events_transactions_history_sizing), CMD_LINE(REQUIRED_ARG), VALID_RANGE(-1, 1024), DEFAULT(PFS_AUTOSIZE_VALUE), BLOCK_SIZE(1), PFS_TRAILING_PROPERTIES) ( "performance_schema_events_transactions_history_size"  ,
"Number of rows per thread in EVENTS_TRANSACTIONS_HISTORY." " Use 0 to  disable,
-1 for automated sizing."  ,
READ_ONLY   GLOBAL_VARpfs_param.m_events_transactions_history_sizing,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(-1, 1024)  ,
DEFAULT(PFS_AUTOSIZE_VALUE ,
BLOCK_SIZE(1)  ,
PFS_TRAILING_PROPERTIES   
)
static

◆ Sys_pfs_events_waits_history_long_size

Sys_var_long Sys_pfs_events_waits_history_long_size("performance_schema_events_waits_history_long_size", "Number of rows in EVENTS_WAITS_HISTORY_LONG." " Use 0 to disable, -1 for automated sizing.", READ_ONLY GLOBAL_VAR(pfs_param.m_events_waits_history_long_sizing), CMD_LINE(REQUIRED_ARG), VALID_RANGE(-1, 1024 *1024), DEFAULT(PFS_AUTOSIZE_VALUE), BLOCK_SIZE(1), PFS_TRAILING_PROPERTIES) ( "performance_schema_events_waits_history_long_size"  ,
"Number of rows in EVENTS_WAITS_HISTORY_LONG." " Use 0 to  disable,
-1 for automated sizing."  ,
READ_ONLY   GLOBAL_VARpfs_param.m_events_waits_history_long_sizing,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(-1, 1024 *1024)  ,
DEFAULT(PFS_AUTOSIZE_VALUE ,
BLOCK_SIZE(1)  ,
PFS_TRAILING_PROPERTIES   
)
static

◆ Sys_pfs_events_waits_history_size

Sys_var_long Sys_pfs_events_waits_history_size("performance_schema_events_waits_history_size", "Number of rows per thread in EVENTS_WAITS_HISTORY." " Use 0 to disable, -1 for automated sizing.", READ_ONLY GLOBAL_VAR(pfs_param.m_events_waits_history_sizing), CMD_LINE(REQUIRED_ARG), VALID_RANGE(-1, 1024), DEFAULT(PFS_AUTOSIZE_VALUE), BLOCK_SIZE(1), PFS_TRAILING_PROPERTIES) ( "performance_schema_events_waits_history_size"  ,
"Number of rows per thread in EVENTS_WAITS_HISTORY." " Use 0 to  disable,
-1 for automated sizing."  ,
READ_ONLY   GLOBAL_VARpfs_param.m_events_waits_history_sizing,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(-1, 1024)  ,
DEFAULT(PFS_AUTOSIZE_VALUE ,
BLOCK_SIZE(1)  ,
PFS_TRAILING_PROPERTIES   
)
static

◆ Sys_pfs_hosts_size

Sys_var_long Sys_pfs_hosts_size("performance_schema_hosts_size", "Maximum number of instrumented hosts." " Use 0 to disable, -1 for automated scaling.", READ_ONLY GLOBAL_VAR(pfs_param.m_host_sizing), CMD_LINE(REQUIRED_ARG), VALID_RANGE(-1, 1024 *1024), DEFAULT(PFS_AUTOSCALE_VALUE), BLOCK_SIZE(1), PFS_TRAILING_PROPERTIES) ( "performance_schema_hosts_size"  ,
"Maximum number of instrumented hosts." " Use 0 to  disable,
-1 for automated scaling."  ,
READ_ONLY   GLOBAL_VARpfs_param.m_host_sizing,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(-1, 1024 *1024)  ,
DEFAULT(PFS_AUTOSCALE_VALUE ,
BLOCK_SIZE(1)  ,
PFS_TRAILING_PROPERTIES   
)
static

◆ Sys_pfs_instrument

Sys_var_charptr Sys_pfs_instrument("performance_schema_instrument", "Default startup value for a performance schema instrument.", READ_ONLY NOT_VISIBLE GLOBAL_VAR(pfs_param.m_pfs_instrument), CMD_LINE(OPT_ARG, OPT_PFS_INSTRUMENT), IN_FS_CHARSET, DEFAULT(""), PFS_TRAILING_PROPERTIES) ( "performance_schema_instrument"  ,
"Default startup value for a performance schema instrument."  ,
READ_ONLY NOT_VISIBLE   GLOBAL_VARpfs_param.m_pfs_instrument,
CMD_LINE(OPT_ARG, OPT_PFS_INSTRUMENT ,
IN_FS_CHARSET  ,
DEFAULT("")  ,
PFS_TRAILING_PROPERTIES   
)
static

◆ Sys_pfs_max_cond_classes

Sys_var_ulong Sys_pfs_max_cond_classes("performance_schema_max_cond_classes", "Maximum number of condition instruments.", READ_ONLY GLOBAL_VAR(pfs_param.m_cond_class_sizing), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, 1024), DEFAULT(PFS_MAX_COND_CLASS), BLOCK_SIZE(1), PFS_TRAILING_PROPERTIES) ( "performance_schema_max_cond_classes"  ,
"Maximum number of condition instruments."  ,
READ_ONLY   GLOBAL_VARpfs_param.m_cond_class_sizing,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(0, 1024)  ,
DEFAULT(PFS_MAX_COND_CLASS ,
BLOCK_SIZE(1)  ,
PFS_TRAILING_PROPERTIES   
)
static

◆ Sys_pfs_max_cond_instances

Sys_var_long Sys_pfs_max_cond_instances("performance_schema_max_cond_instances", "Maximum number of instrumented condition objects." " Use 0 to disable, -1 for automated scaling.", READ_ONLY GLOBAL_VAR(pfs_param.m_cond_sizing), CMD_LINE(REQUIRED_ARG), VALID_RANGE(-1, 1024 *1024), DEFAULT(PFS_AUTOSCALE_VALUE), BLOCK_SIZE(1), PFS_TRAILING_PROPERTIES) ( "performance_schema_max_cond_instances"  ,
"Maximum number of instrumented condition objects." " Use 0 to  disable,
-1 for automated scaling."  ,
READ_ONLY   GLOBAL_VARpfs_param.m_cond_sizing,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(-1, 1024 *1024)  ,
DEFAULT(PFS_AUTOSCALE_VALUE ,
BLOCK_SIZE(1)  ,
PFS_TRAILING_PROPERTIES   
)
static

◆ Sys_pfs_max_digest_length

Sys_var_long Sys_pfs_max_digest_length("performance_schema_max_digest_length", "Maximum length considered for digest text, when stored in " "performance_schema tables.", READ_ONLY GLOBAL_VAR(pfs_param.m_max_digest_length), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, 1024 *1024), DEFAULT(1024), BLOCK_SIZE(1), PFS_TRAILING_PROPERTIES) ( "performance_schema_max_digest_length"  ,
"Maximum length considered for digest  text,
when stored in " "performance_schema tables."  ,
READ_ONLY   GLOBAL_VARpfs_param.m_max_digest_length,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(0, 1024 *1024)  ,
DEFAULT(1024)  ,
BLOCK_SIZE(1)  ,
PFS_TRAILING_PROPERTIES   
)
static

◆ Sys_pfs_max_digest_sample_age

Sys_var_ulong Sys_pfs_max_digest_sample_age("performance_schema_max_digest_sample_age", "The time in seconds after which a previous query sample is considered old." " When the value is 0, queries are sampled once." " When the value is greater than zero, queries are re sampled if the" " last sample is more than performance_schema_max_digest_sample_age " "seconds old.", GLOBAL_VAR(pfs_param.m_max_digest_sample_age), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, 1024 *1024), DEFAULT(60), BLOCK_SIZE(1), PFS_TRAILING_PROPERTIES) ( "performance_schema_max_digest_sample_age"  ,
"The time in seconds after which a previous query sample is considered old." " When the value is  0,
queries are sampled once." " When the value is greater than  zero,
queries are re sampled if the" " last sample is more than performance_schema_max_digest_sample_age " "seconds old."  ,
GLOBAL_VAR(pfs_param.m_max_digest_sample_age)  ,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(0, 1024 *1024)  ,
DEFAULT(60)  ,
BLOCK_SIZE(1)  ,
PFS_TRAILING_PROPERTIES   
)
static

◆ Sys_pfs_max_file_classes

Sys_var_ulong Sys_pfs_max_file_classes("performance_schema_max_file_classes", "Maximum number of file instruments.", READ_ONLY GLOBAL_VAR(pfs_param.m_file_class_sizing), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, 1024), DEFAULT(PFS_MAX_FILE_CLASS), BLOCK_SIZE(1), PFS_TRAILING_PROPERTIES) ( "performance_schema_max_file_classes"  ,
"Maximum number of file instruments."  ,
READ_ONLY   GLOBAL_VARpfs_param.m_file_class_sizing,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(0, 1024)  ,
DEFAULT(PFS_MAX_FILE_CLASS ,
BLOCK_SIZE(1)  ,
PFS_TRAILING_PROPERTIES   
)
static

◆ Sys_pfs_max_file_handles

Sys_var_ulong Sys_pfs_max_file_handles("performance_schema_max_file_handles", "Maximum number of opened instrumented files.", READ_ONLY GLOBAL_VAR(pfs_param.m_file_handle_sizing), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, 1024 *1024), DEFAULT(PFS_MAX_FILE_HANDLE), BLOCK_SIZE(1), PFS_TRAILING_PROPERTIES) ( "performance_schema_max_file_handles"  ,
"Maximum number of opened instrumented files."  ,
READ_ONLY   GLOBAL_VARpfs_param.m_file_handle_sizing,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(0, 1024 *1024)  ,
DEFAULT(PFS_MAX_FILE_HANDLE ,
BLOCK_SIZE(1)  ,
PFS_TRAILING_PROPERTIES   
)
static

◆ Sys_pfs_max_file_instances

Sys_var_long Sys_pfs_max_file_instances("performance_schema_max_file_instances", "Maximum number of instrumented files." " Use 0 to disable, -1 for automated scaling.", READ_ONLY GLOBAL_VAR(pfs_param.m_file_sizing), CMD_LINE(REQUIRED_ARG), VALID_RANGE(-1, 1024 *1024), DEFAULT(PFS_AUTOSCALE_VALUE), BLOCK_SIZE(1), PFS_TRAILING_PROPERTIES) ( "performance_schema_max_file_instances"  ,
"Maximum number of instrumented files." " Use 0 to  disable,
-1 for automated scaling."  ,
READ_ONLY   GLOBAL_VARpfs_param.m_file_sizing,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(-1, 1024 *1024)  ,
DEFAULT(PFS_AUTOSCALE_VALUE ,
BLOCK_SIZE(1)  ,
PFS_TRAILING_PROPERTIES   
)
static

◆ Sys_pfs_max_index_stat

Sys_var_long Sys_pfs_max_index_stat("performance_schema_max_index_stat", "Maximum number of index statistics for instrumented tables." " Use 0 to disable, -1 for automated scaling.", READ_ONLY GLOBAL_VAR(pfs_param.m_index_stat_sizing), CMD_LINE(REQUIRED_ARG), VALID_RANGE(-1, 1024 *1024), DEFAULT(PFS_AUTOSCALE_VALUE), BLOCK_SIZE(1), PFS_TRAILING_PROPERTIES) ( "performance_schema_max_index_stat"  ,
"Maximum number of index statistics for instrumented tables." " Use 0 to  disable,
-1 for automated scaling."  ,
READ_ONLY   GLOBAL_VARpfs_param.m_index_stat_sizing,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(-1, 1024 *1024)  ,
DEFAULT(PFS_AUTOSCALE_VALUE ,
BLOCK_SIZE(1)  ,
PFS_TRAILING_PROPERTIES   
)
static

◆ Sys_pfs_max_memory_classes

Sys_var_ulong Sys_pfs_max_memory_classes("performance_schema_max_memory_classes", "Maximum number of memory pool instruments.", READ_ONLY GLOBAL_VAR(pfs_param.m_memory_class_sizing), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, 1024), DEFAULT(PFS_MAX_MEMORY_CLASS), BLOCK_SIZE(1), PFS_TRAILING_PROPERTIES) ( "performance_schema_max_memory_classes"  ,
"Maximum number of memory pool instruments."  ,
READ_ONLY   GLOBAL_VARpfs_param.m_memory_class_sizing,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(0, 1024)  ,
DEFAULT(PFS_MAX_MEMORY_CLASS ,
BLOCK_SIZE(1)  ,
PFS_TRAILING_PROPERTIES   
)
static

◆ Sys_pfs_max_metadata_locks

Sys_var_long Sys_pfs_max_metadata_locks("performance_schema_max_metadata_locks", "Maximum number of metadata locks." " Use 0 to disable, -1 for automated scaling.", READ_ONLY GLOBAL_VAR(pfs_param.m_metadata_lock_sizing), CMD_LINE(REQUIRED_ARG), VALID_RANGE(-1, 100 *1024 *1024), DEFAULT(PFS_AUTOSCALE_VALUE), BLOCK_SIZE(1), PFS_TRAILING_PROPERTIES) ( "performance_schema_max_metadata_locks"  ,
"Maximum number of metadata locks." " Use 0 to  disable,
-1 for automated scaling."  ,
READ_ONLY   GLOBAL_VARpfs_param.m_metadata_lock_sizing,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(-1, 100 *1024 *1024)  ,
DEFAULT(PFS_AUTOSCALE_VALUE ,
BLOCK_SIZE(1)  ,
PFS_TRAILING_PROPERTIES   
)
static

◆ Sys_pfs_max_meter_classes

Sys_var_ulong Sys_pfs_max_meter_classes("performance_schema_max_meter_classes", "Maximum number of meter source instruments.", READ_ONLY GLOBAL_VAR(pfs_param.m_meter_class_sizing), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, 64), DEFAULT(PFS_MAX_METER_CLASS), BLOCK_SIZE(1), PFS_TRAILING_PROPERTIES) ( "performance_schema_max_meter_classes"  ,
"Maximum number of meter source instruments."  ,
READ_ONLY   GLOBAL_VARpfs_param.m_meter_class_sizing,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(0, 64)  ,
DEFAULT(PFS_MAX_METER_CLASS ,
BLOCK_SIZE(1)  ,
PFS_TRAILING_PROPERTIES   
)
static

◆ Sys_pfs_max_metric_classes

Sys_var_ulong Sys_pfs_max_metric_classes("performance_schema_max_metric_classes", "Maximum number of metric source instruments.", READ_ONLY GLOBAL_VAR(pfs_param.m_metric_class_sizing), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, 11000), DEFAULT(PFS_MAX_METRIC_CLASS), BLOCK_SIZE(1), PFS_TRAILING_PROPERTIES) ( "performance_schema_max_metric_classes"  ,
"Maximum number of metric source instruments."  ,
READ_ONLY   GLOBAL_VARpfs_param.m_metric_class_sizing,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(0, 11000)  ,
DEFAULT(PFS_MAX_METRIC_CLASS ,
BLOCK_SIZE(1)  ,
PFS_TRAILING_PROPERTIES   
)
static

◆ Sys_pfs_max_mutex_classes

Sys_var_ulong Sys_pfs_max_mutex_classes("performance_schema_max_mutex_classes", "Maximum number of mutex instruments.", READ_ONLY GLOBAL_VAR(pfs_param.m_mutex_class_sizing), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, 1024), DEFAULT(PFS_MAX_MUTEX_CLASS), BLOCK_SIZE(1), PFS_TRAILING_PROPERTIES) ( "performance_schema_max_mutex_classes"  ,
"Maximum number of mutex instruments."  ,
READ_ONLY   GLOBAL_VARpfs_param.m_mutex_class_sizing,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(0, 1024)  ,
DEFAULT(PFS_MAX_MUTEX_CLASS ,
BLOCK_SIZE(1)  ,
PFS_TRAILING_PROPERTIES   
)
static

◆ Sys_pfs_max_mutex_instances

Sys_var_long Sys_pfs_max_mutex_instances("performance_schema_max_mutex_instances", "Maximum number of instrumented MUTEX objects." " Use 0 to disable, -1 for automated scaling.", READ_ONLY GLOBAL_VAR(pfs_param.m_mutex_sizing), CMD_LINE(REQUIRED_ARG), VALID_RANGE(-1, 100 *1024 *1024), DEFAULT(PFS_AUTOSCALE_VALUE), BLOCK_SIZE(1), PFS_TRAILING_PROPERTIES) ( "performance_schema_max_mutex_instances"  ,
"Maximum number of instrumented MUTEX objects." " Use 0 to  disable,
-1 for automated scaling."  ,
READ_ONLY   GLOBAL_VARpfs_param.m_mutex_sizing,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(-1, 100 *1024 *1024)  ,
DEFAULT(PFS_AUTOSCALE_VALUE ,
BLOCK_SIZE(1)  ,
PFS_TRAILING_PROPERTIES   
)
static

◆ Sys_pfs_max_prepared_stmt_instances

Sys_var_long Sys_pfs_max_prepared_stmt_instances("performance_schema_max_prepared_statements_instances", "Maximum number of instrumented prepared statements." " Use 0 to disable, -1 for automated scaling.", READ_ONLY GLOBAL_VAR(pfs_param.m_prepared_stmt_sizing), CMD_LINE(REQUIRED_ARG), VALID_RANGE(-1, num_prepared_stmt_limit), DEFAULT(PFS_AUTOSCALE_VALUE), BLOCK_SIZE(1), PFS_TRAILING_PROPERTIES) ( "performance_schema_max_prepared_statements_instances"  ,
"Maximum number of instrumented prepared statements." " Use 0 to  disable,
-1 for automated scaling."  ,
READ_ONLY   GLOBAL_VARpfs_param.m_prepared_stmt_sizing,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(-1, num_prepared_stmt_limit ,
DEFAULT(PFS_AUTOSCALE_VALUE ,
BLOCK_SIZE(1)  ,
PFS_TRAILING_PROPERTIES   
)
static

◆ Sys_pfs_max_program_instances

Sys_var_long Sys_pfs_max_program_instances("performance_schema_max_program_instances", "Maximum number of instrumented programs." " Use 0 to disable, -1 for automated scaling.", READ_ONLY GLOBAL_VAR(pfs_param.m_program_sizing), CMD_LINE(REQUIRED_ARG), VALID_RANGE(-1, 1024 *1024), DEFAULT(PFS_AUTOSCALE_VALUE), BLOCK_SIZE(1), PFS_TRAILING_PROPERTIES) ( "performance_schema_max_program_instances"  ,
"Maximum number of instrumented programs." " Use 0 to  disable,
-1 for automated scaling."  ,
READ_ONLY   GLOBAL_VARpfs_param.m_program_sizing,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(-1, 1024 *1024)  ,
DEFAULT(PFS_AUTOSCALE_VALUE ,
BLOCK_SIZE(1)  ,
PFS_TRAILING_PROPERTIES   
)
static

◆ Sys_pfs_max_rwlock_classes

Sys_var_ulong Sys_pfs_max_rwlock_classes("performance_schema_max_rwlock_classes", "Maximum number of rwlock instruments.", READ_ONLY GLOBAL_VAR(pfs_param.m_rwlock_class_sizing), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, 1024), DEFAULT(PFS_MAX_RWLOCK_CLASS), BLOCK_SIZE(1), PFS_TRAILING_PROPERTIES) ( "performance_schema_max_rwlock_classes"  ,
"Maximum number of rwlock instruments."  ,
READ_ONLY   GLOBAL_VARpfs_param.m_rwlock_class_sizing,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(0, 1024)  ,
DEFAULT(PFS_MAX_RWLOCK_CLASS ,
BLOCK_SIZE(1)  ,
PFS_TRAILING_PROPERTIES   
)
static

◆ Sys_pfs_max_rwlock_instances

Sys_var_long Sys_pfs_max_rwlock_instances("performance_schema_max_rwlock_instances", "Maximum number of instrumented RWLOCK objects." " Use 0 to disable, -1 for automated scaling.", READ_ONLY GLOBAL_VAR(pfs_param.m_rwlock_sizing), CMD_LINE(REQUIRED_ARG), VALID_RANGE(-1, 100 *1024 *1024), DEFAULT(PFS_AUTOSCALE_VALUE), BLOCK_SIZE(1), PFS_TRAILING_PROPERTIES) ( "performance_schema_max_rwlock_instances"  ,
"Maximum number of instrumented RWLOCK objects." " Use 0 to  disable,
-1 for automated scaling."  ,
READ_ONLY   GLOBAL_VARpfs_param.m_rwlock_sizing,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(-1, 100 *1024 *1024)  ,
DEFAULT(PFS_AUTOSCALE_VALUE ,
BLOCK_SIZE(1)  ,
PFS_TRAILING_PROPERTIES   
)
static

◆ Sys_pfs_max_socket_classes

Sys_var_ulong Sys_pfs_max_socket_classes("performance_schema_max_socket_classes", "Maximum number of socket instruments.", READ_ONLY GLOBAL_VAR(pfs_param.m_socket_class_sizing), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, 1024), DEFAULT(PFS_MAX_SOCKET_CLASS), BLOCK_SIZE(1), PFS_TRAILING_PROPERTIES) ( "performance_schema_max_socket_classes"  ,
"Maximum number of socket instruments."  ,
READ_ONLY   GLOBAL_VARpfs_param.m_socket_class_sizing,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(0, 1024)  ,
DEFAULT(PFS_MAX_SOCKET_CLASS ,
BLOCK_SIZE(1)  ,
PFS_TRAILING_PROPERTIES   
)
static

◆ Sys_pfs_max_sockets

Sys_var_long Sys_pfs_max_sockets("performance_schema_max_socket_instances", "Maximum number of opened instrumented sockets." " Use 0 to disable, -1 for automated scaling.", READ_ONLY GLOBAL_VAR(pfs_param.m_socket_sizing), CMD_LINE(REQUIRED_ARG), VALID_RANGE(-1, 1024 *1024), DEFAULT(PFS_AUTOSCALE_VALUE), BLOCK_SIZE(1), PFS_TRAILING_PROPERTIES) ( "performance_schema_max_socket_instances"  ,
"Maximum number of opened instrumented sockets." " Use 0 to  disable,
-1 for automated scaling."  ,
READ_ONLY   GLOBAL_VARpfs_param.m_socket_sizing,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(-1, 1024 *1024)  ,
DEFAULT(PFS_AUTOSCALE_VALUE ,
BLOCK_SIZE(1)  ,
PFS_TRAILING_PROPERTIES   
)
static

◆ Sys_pfs_max_sql_text_length

Sys_var_long Sys_pfs_max_sql_text_length("performance_schema_max_sql_text_length", "Maximum length of displayed sql text.", READ_ONLY GLOBAL_VAR(pfs_param.m_max_sql_text_length), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, 1024 *1024), DEFAULT(1024), BLOCK_SIZE(1), PFS_TRAILING_PROPERTIES) ( "performance_schema_max_sql_text_length"  ,
"Maximum length of displayed sql text."  ,
READ_ONLY   GLOBAL_VARpfs_param.m_max_sql_text_length,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(0, 1024 *1024)  ,
DEFAULT(1024)  ,
BLOCK_SIZE(1)  ,
PFS_TRAILING_PROPERTIES   
)
static

◆ Sys_pfs_max_stage_classes

Sys_var_ulong Sys_pfs_max_stage_classes("performance_schema_max_stage_classes", "Maximum number of stage instruments.", READ_ONLY GLOBAL_VAR(pfs_param.m_stage_class_sizing), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, 1024), DEFAULT(PFS_MAX_STAGE_CLASS), BLOCK_SIZE(1), PFS_TRAILING_PROPERTIES) ( "performance_schema_max_stage_classes"  ,
"Maximum number of stage instruments."  ,
READ_ONLY   GLOBAL_VARpfs_param.m_stage_class_sizing,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(0, 1024)  ,
DEFAULT(PFS_MAX_STAGE_CLASS ,
BLOCK_SIZE(1)  ,
PFS_TRAILING_PROPERTIES   
)
static

◆ Sys_pfs_max_statement_classes

Sys_var_ulong Sys_pfs_max_statement_classes("performance_schema_max_statement_classes", "Maximum number of statement instruments.", READ_ONLY GLOBAL_VAR(pfs_param.m_statement_class_sizing), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, 256), DEFAULT((ulong) SQLCOM_END+(ulong) COM_END+5+ SP_PSI_STATEMENT_INFO_COUNT+CLONE_PSI_STATEMENT_COUNT), BLOCK_SIZE(1), PFS_TRAILING_PROPERTIES) ( "performance_schema_max_statement_classes"  ,
"Maximum number of statement instruments."  ,
READ_ONLY   GLOBAL_VARpfs_param.m_statement_class_sizing,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(0, 256)  ,
DEFAULT((ulong) SQLCOM_END+(ulong) COM_END+5+ SP_PSI_STATEMENT_INFO_COUNT+CLONE_PSI_STATEMENT_COUNT ,
BLOCK_SIZE(1)  ,
PFS_TRAILING_PROPERTIES   
)
static

Variable performance_schema_max_statement_classes.

The default number of statement classes is the sum of:

  • COM_END for all regular "statement/com/...",
  • 1 for "statement/com/new_packet", for unknown enum_server_command
  • 1 for "statement/com/Error", for invalid enum_server_command
  • SQLCOM_END for all regular "statement/sql/...",
  • 1 for "statement/sql/error", for invalid enum_sql_command.
  • SP_PSI_STATEMENT_INFO_COUNT for "statement/sp/...".
  • CLONE_PSI_STATEMENT_COUNT for "statement/clone/...".
  • 1 for "statement/rpl/relay_log", for replicated statements.
  • 1 for "statement/scheduler/event", for scheduled events.

◆ Sys_pfs_max_table_handles

Sys_var_long Sys_pfs_max_table_handles("performance_schema_max_table_handles", "Maximum number of opened instrumented tables." " Use 0 to disable, -1 for automated scaling.", READ_ONLY GLOBAL_VAR(pfs_param.m_table_sizing), CMD_LINE(REQUIRED_ARG), VALID_RANGE(-1, 1024 *1024), DEFAULT(PFS_AUTOSCALE_VALUE), BLOCK_SIZE(1), PFS_TRAILING_PROPERTIES) ( "performance_schema_max_table_handles"  ,
"Maximum number of opened instrumented tables." " Use 0 to  disable,
-1 for automated scaling."  ,
READ_ONLY   GLOBAL_VARpfs_param.m_table_sizing,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(-1, 1024 *1024)  ,
DEFAULT(PFS_AUTOSCALE_VALUE ,
BLOCK_SIZE(1)  ,
PFS_TRAILING_PROPERTIES   
)
static

◆ Sys_pfs_max_table_instances

Sys_var_long Sys_pfs_max_table_instances("performance_schema_max_table_instances", "Maximum number of instrumented tables." " Use 0 to disable, -1 for automated scaling.", READ_ONLY GLOBAL_VAR(pfs_param.m_table_share_sizing), CMD_LINE(REQUIRED_ARG), VALID_RANGE(-1, 1024 *1024), DEFAULT(PFS_AUTOSCALE_VALUE), BLOCK_SIZE(1), PFS_TRAILING_PROPERTIES) ( "performance_schema_max_table_instances"  ,
"Maximum number of instrumented tables." " Use 0 to  disable,
-1 for automated scaling."  ,
READ_ONLY   GLOBAL_VARpfs_param.m_table_share_sizing,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(-1, 1024 *1024)  ,
DEFAULT(PFS_AUTOSCALE_VALUE ,
BLOCK_SIZE(1)  ,
PFS_TRAILING_PROPERTIES   
)
static

◆ Sys_pfs_max_table_lock_stat

Sys_var_long Sys_pfs_max_table_lock_stat("performance_schema_max_table_lock_stat", "Maximum number of lock statistics for instrumented tables." " Use 0 to disable, -1 for automated scaling.", READ_ONLY GLOBAL_VAR(pfs_param.m_table_lock_stat_sizing), CMD_LINE(REQUIRED_ARG), VALID_RANGE(-1, 1024 *1024), DEFAULT(PFS_AUTOSCALE_VALUE), BLOCK_SIZE(1), PFS_TRAILING_PROPERTIES) ( "performance_schema_max_table_lock_stat"  ,
"Maximum number of lock statistics for instrumented tables." " Use 0 to  disable,
-1 for automated scaling."  ,
READ_ONLY   GLOBAL_VARpfs_param.m_table_lock_stat_sizing,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(-1, 1024 *1024)  ,
DEFAULT(PFS_AUTOSCALE_VALUE ,
BLOCK_SIZE(1)  ,
PFS_TRAILING_PROPERTIES   
)
static

◆ Sys_pfs_max_thread_classes

Sys_var_ulong Sys_pfs_max_thread_classes("performance_schema_max_thread_classes", "Maximum number of thread instruments.", READ_ONLY GLOBAL_VAR(pfs_param.m_thread_class_sizing), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, 1024), DEFAULT(PFS_MAX_THREAD_CLASS), BLOCK_SIZE(1), PFS_TRAILING_PROPERTIES) ( "performance_schema_max_thread_classes"  ,
"Maximum number of thread instruments."  ,
READ_ONLY   GLOBAL_VARpfs_param.m_thread_class_sizing,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(0, 1024)  ,
DEFAULT(PFS_MAX_THREAD_CLASS ,
BLOCK_SIZE(1)  ,
PFS_TRAILING_PROPERTIES   
)
static

◆ Sys_pfs_max_thread_instances

Sys_var_long Sys_pfs_max_thread_instances("performance_schema_max_thread_instances", "Maximum number of instrumented threads." " Use 0 to disable, -1 for automated scaling.", READ_ONLY GLOBAL_VAR(pfs_param.m_thread_sizing), CMD_LINE(REQUIRED_ARG), VALID_RANGE(-1, 1024 *1024), DEFAULT(PFS_AUTOSCALE_VALUE), BLOCK_SIZE(1), PFS_TRAILING_PROPERTIES) ( "performance_schema_max_thread_instances"  ,
"Maximum number of instrumented threads." " Use 0 to  disable,
-1 for automated scaling."  ,
READ_ONLY   GLOBAL_VARpfs_param.m_thread_sizing,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(-1, 1024 *1024)  ,
DEFAULT(PFS_AUTOSCALE_VALUE ,
BLOCK_SIZE(1)  ,
PFS_TRAILING_PROPERTIES   
)
static

◆ Sys_pfs_processlist

Sys_var_bool Sys_pfs_processlist("performance_schema_show_processlist", "Default startup value to enable SHOW PROCESSLIST " "in the performance schema.", GLOBAL_VAR(pfs_processlist_enabled), CMD_LINE(OPT_ARG), DEFAULT(false), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(performance_schema_show_processlist_update), nullptr, sys_var::PARSE_NORMAL) ( "performance_schema_show_processlist"  ,
"Default startup value to enable SHOW PROCESSLIST " "in the performance schema."  ,
GLOBAL_VAR(pfs_processlist_enabled ,
CMD_LINE(OPT_ARG ,
DEFAULT(false)  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(nullptr ,
ON_UPDATE(performance_schema_show_processlist_update ,
nullptr  ,
sys_var::PARSE_NORMAL   
)
static

◆ Sys_pfs_setup_actors_size

Sys_var_long Sys_pfs_setup_actors_size("performance_schema_setup_actors_size", "Maximum number of rows in SETUP_ACTORS." " Use 0 to disable, -1 for automated scaling.", READ_ONLY GLOBAL_VAR(pfs_param.m_setup_actor_sizing), CMD_LINE(REQUIRED_ARG), VALID_RANGE(-1, 1024 *1024), DEFAULT(PFS_AUTOSCALE_VALUE), BLOCK_SIZE(1), PFS_TRAILING_PROPERTIES) ( "performance_schema_setup_actors_size"  ,
"Maximum number of rows in SETUP_ACTORS." " Use 0 to  disable,
-1 for automated scaling."  ,
READ_ONLY   GLOBAL_VARpfs_param.m_setup_actor_sizing,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(-1, 1024 *1024)  ,
DEFAULT(PFS_AUTOSCALE_VALUE ,
BLOCK_SIZE(1)  ,
PFS_TRAILING_PROPERTIES   
)
static

◆ Sys_pfs_setup_objects_size

Sys_var_long Sys_pfs_setup_objects_size("performance_schema_setup_objects_size", "Maximum number of rows in SETUP_OBJECTS." " Use 0 to disable, -1 for automated scaling.", READ_ONLY GLOBAL_VAR(pfs_param.m_setup_object_sizing), CMD_LINE(REQUIRED_ARG), VALID_RANGE(-1, 1024 *1024), DEFAULT(PFS_AUTOSCALE_VALUE), BLOCK_SIZE(1), PFS_TRAILING_PROPERTIES) ( "performance_schema_setup_objects_size"  ,
"Maximum number of rows in SETUP_OBJECTS." " Use 0 to  disable,
-1 for automated scaling."  ,
READ_ONLY   GLOBAL_VARpfs_param.m_setup_object_sizing,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(-1, 1024 *1024)  ,
DEFAULT(PFS_AUTOSCALE_VALUE ,
BLOCK_SIZE(1)  ,
PFS_TRAILING_PROPERTIES   
)
static

◆ Sys_pfs_statement_stack_size

Sys_var_ulong Sys_pfs_statement_stack_size("performance_schema_max_statement_stack", "Number of rows per thread in EVENTS_STATEMENTS_CURRENT.", READ_ONLY GLOBAL_VAR(pfs_param.m_statement_stack_sizing), CMD_LINE(REQUIRED_ARG), VALID_RANGE(1, 256), DEFAULT(PFS_STATEMENTS_STACK_SIZE), BLOCK_SIZE(1), PFS_TRAILING_PROPERTIES) ( "performance_schema_max_statement_stack"  ,
"Number of rows per thread in EVENTS_STATEMENTS_CURRENT."  ,
READ_ONLY   GLOBAL_VARpfs_param.m_statement_stack_sizing,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(1, 256)  ,
DEFAULT(PFS_STATEMENTS_STACK_SIZE ,
BLOCK_SIZE(1)  ,
PFS_TRAILING_PROPERTIES   
)
static

◆ Sys_pfs_users_size

Sys_var_long Sys_pfs_users_size("performance_schema_users_size", "Maximum number of instrumented users." " Use 0 to disable, -1 for automated scaling.", READ_ONLY GLOBAL_VAR(pfs_param.m_user_sizing), CMD_LINE(REQUIRED_ARG), VALID_RANGE(-1, 1024 *1024), DEFAULT(PFS_AUTOSCALE_VALUE), BLOCK_SIZE(1), PFS_TRAILING_PROPERTIES) ( "performance_schema_users_size"  ,
"Maximum number of instrumented users." " Use 0 to  disable,
-1 for automated scaling."  ,
READ_ONLY   GLOBAL_VARpfs_param.m_user_sizing,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(-1, 1024 *1024)  ,
DEFAULT(PFS_AUTOSCALE_VALUE ,
BLOCK_SIZE(1)  ,
PFS_TRAILING_PROPERTIES   
)
static

◆ Sys_pid_file

Sys_var_charptr Sys_pid_file("pid_file", "Pid file used by safe_mysqld", READ_ONLY NON_PERSIST GLOBAL_VAR(pidfile_name_ptr), CMD_LINE(REQUIRED_ARG), IN_FS_CHARSET, DEFAULT(pidfile_name)) ( "pid_file"  ,
"Pid file used by safe_mysqld"  ,
READ_ONLY NON_PERSIST   GLOBAL_VARpidfile_name_ptr,
CMD_LINE(REQUIRED_ARG ,
IN_FS_CHARSET  ,
DEFAULT(pidfile_name  
)
static

◆ Sys_plugin_dir

Sys_var_charptr Sys_plugin_dir("plugin_dir", "Directory for plugins", READ_ONLY NON_PERSIST GLOBAL_VAR(opt_plugin_dir_ptr), CMD_LINE(REQUIRED_ARG), IN_FS_CHARSET, DEFAULT(nullptr)) ( "plugin_dir"  ,
"Directory for plugins"  ,
READ_ONLY NON_PERSIST   GLOBAL_VARopt_plugin_dir_ptr,
CMD_LINE(REQUIRED_ARG ,
IN_FS_CHARSET  ,
DEFAULT(nullptr  
)
static

◆ Sys_port

Sys_var_uint Sys_port("port", "Port number to use for connection or 0 to default to, " "my.cnf, $MYSQL_TCP_PORT, " "/etc/services, " "built-in default (" STRINGIFY_ARG(MYSQL_PORT) "), whatever comes first", READ_ONLY NON_PERSIST GLOBAL_VAR(mysqld_port), CMD_LINE(REQUIRED_ARG, 'P'), VALID_RANGE(0, 65535), DEFAULT(0), BLOCK_SIZE(1)) ( "port"  ,
"Port number to use for connection or 0 to default  to,
" "my.  cnf,
  $MYSQL_TCP_PORT,
" "/etc/  services,
" "built-in   default" STRINGIFY_ARG(MYSQL_PORT) ",
whatever comes first"  ,
READ_ONLY NON_PERSIST   GLOBAL_VARmysqld_port,
CMD_LINE(REQUIRED_ARG, 'P')  ,
VALID_RANGE(0, 65535)  ,
DEFAULT(0)  ,
BLOCK_SIZE(1)   
)
static

◆ Sys_preload_buff_size

Sys_var_ulong Sys_preload_buff_size("preload_buffer_size", "The size of the buffer that is allocated when preloading indexes", SESSION_VAR(preload_buff_size), CMD_LINE(REQUIRED_ARG), VALID_RANGE(1024, 1024 *1024 *1024), DEFAULT(32768), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_session_admin_no_super)) ( "preload_buffer_size"  ,
"The size of the buffer that is allocated when preloading indexes"  ,
SESSION_VAR(preload_buff_size)  ,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(1024, 1024 *1024 *1024)  ,
DEFAULT(32768)  ,
BLOCK_SIZE(1)  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(check_session_admin_no_super  
)
static

◆ Sys_profiling

Sys_var_bit Sys_profiling("profiling", "profiling", SESSION_VAR(option_bits), NO_CMD_LINE, OPTION_PROFILING, DEFAULT(false), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), PRE_UPDATE(nullptr), ON_UPDATE(nullptr), DEPRECATED_VAR("")) ( "profiling"  ,
"profiling"  ,
SESSION_VAR(option_bits)  ,
NO_CMD_LINE  ,
OPTION_PROFILING  ,
DEFAULT(false)  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(nullptr ,
PRE_UPDATE(nullptr ,
ON_UPDATE(nullptr ,
DEPRECATED_VAR("")   
)
static

◆ Sys_profiling_history_size

Sys_var_ulong Sys_profiling_history_size("profiling_history_size", "Limit of query profiling memory", SESSION_VAR(profiling_history_size), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, 100), DEFAULT(15), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(nullptr), DEPRECATED_VAR("")) ( "profiling_history_size"  ,
"Limit of query profiling memory"  ,
SESSION_VAR(profiling_history_size)  ,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(0, 100)  ,
DEFAULT(15)  ,
BLOCK_SIZE(1)  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(nullptr ,
ON_UPDATE(nullptr ,
DEPRECATED_VAR("")   
)
static

◆ Sys_protocol_compression_algorithms

Sys_var_charptr Sys_protocol_compression_algorithms("protocol_compression_algorithms", "List of compression algorithms supported by server. Supported values " "are any combination of zlib, zstd, uncompressed. Command line clients " "may use the --compression-algorithms flag to specify a set of algorithms, " "and the connection will use an algorithm supported by both client and " "server. It picks zlib if both client and server support it; otherwise it " "picks zstd if both support it; otherwise it picks uncompressed if both " "support it; otherwise it fails.", GLOBAL_VAR(opt_protocol_compression_algorithms), CMD_LINE(REQUIRED_ARG), IN_FS_CHARSET, DEFAULT(const_cast< char * >(PROTOCOL_COMPRESSION_DEFAULT_VALUE)), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_set_protocol_compression_algorithms), ON_UPDATE(nullptr)) ( "protocol_compression_algorithms"  ,
"List of compression algorithms supported by server. Supported values " "are any combination of  zlib,
zstd  ,
uncompressed. Command line clients " "may use the --compression-algorithms flag to specify a set of  algorithms,
" "and the connection will use an algorithm supported by both client and " "server. It picks zlib if both client and server support it;otherwise it " "picks zstd if both support it;otherwise it picks uncompressed if both " "support it;otherwise it fails."  ,
GLOBAL_VAR(opt_protocol_compression_algorithms ,
CMD_LINE(REQUIRED_ARG ,
IN_FS_CHARSET  ,
DEFAULT(const_cast< char * >(PROTOCOL_COMPRESSION_DEFAULT_VALUE))  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(check_set_protocol_compression_algorithms ,
ON_UPDATE(nullptr  
)
static

◆ Sys_protocol_version

Sys_var_uint Sys_protocol_version("protocol_version", "The version of the client/server protocol used by the MySQL server", READ_ONLY NON_PERSIST GLOBAL_VAR(protocol_version), NO_CMD_LINE, VALID_RANGE(0, ~0), DEFAULT(PROTOCOL_VERSION), BLOCK_SIZE(1)) ( "protocol_version"  ,
"The version of the client/server protocol used by the MySQL server ,
READ_ONLY NON_PERSIST   GLOBAL_VARprotocol_version,
NO_CMD_LINE  ,
VALID_RANGE(0, ~0)  ,
DEFAULT(PROTOCOL_VERSION ,
BLOCK_SIZE(1)   
)
static

◆ Sys_proxy_user

Sys_var_proxy_user Sys_proxy_user("proxy_user", "The proxy user account name used when logging in", IN_SYSTEM_CHARSET) ( "proxy_user"  ,
"The proxy user account name used when logging in"  ,
IN_SYSTEM_CHARSET   
)
static

◆ Sys_pseudo_replica_mode

Sys_var_bool Sys_pseudo_replica_mode("pseudo_replica_mode", "Internal variable that will be enabled while applying a " "Format_description_log_event encoded in a BINLOG statement printed " "by mysqlbinlog.", SESSION_ONLY(pseudo_replica_mode), NO_CMD_LINE, DEFAULT(false), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_pseudo_replica_mode)) ( "pseudo_replica_mode"  ,
"Internal variable that will be enabled while applying a " "Format_description_log_event encoded in a BINLOG statement printed " "by mysqlbinlog."  ,
SESSION_ONLY(pseudo_replica_mode)  ,
NO_CMD_LINE  ,
DEFAULT(false)  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(check_pseudo_replica_mode  
)
static

◆ Sys_pseudo_slave_mode

Sys_var_deprecated_alias Sys_pseudo_slave_mode("pseudo_slave_mode", Sys_pseudo_replica_mode) ( "pseudo_slave_mode"  ,
Sys_pseudo_replica_mode   
)
static

◆ Sys_pseudo_thread_id

Sys_var_uint Sys_pseudo_thread_id("pseudo_thread_id", "This variable is for internal server use", SESSION_ONLY(pseudo_thread_id), NO_CMD_LINE, VALID_RANGE(0, UINT_MAX32), DEFAULT(0), BLOCK_SIZE(1), NO_MUTEX_GUARD, IN_BINLOG, ON_CHECK(check_session_admin)) ( "pseudo_thread_id"  ,
"This variable is for internal server use"  ,
SESSION_ONLY(pseudo_thread_id)  ,
NO_CMD_LINE  ,
VALID_RANGE(0, UINT_MAX32 ,
DEFAULT(0)  ,
BLOCK_SIZE(1)  ,
NO_MUTEX_GUARD  ,
IN_BINLOG  ,
ON_CHECK(check_session_admin  
)
static

◆ Sys_query_alloc_block_size

Sys_var_ulong Sys_query_alloc_block_size("query_alloc_block_size", "Allocation block size for query parsing and execution", SESSION_VAR(query_alloc_block_size), CMD_LINE(REQUIRED_ARG), VALID_RANGE(1024, UINT_MAX32), DEFAULT(QUERY_ALLOC_BLOCK_SIZE), BLOCK_SIZE(1024), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(fix_thd_mem_root)) ( "query_alloc_block_size"  ,
"Allocation block size for query parsing and execution"  ,
SESSION_VAR(query_alloc_block_size)  ,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(1024, UINT_MAX32 ,
DEFAULT(QUERY_ALLOC_BLOCK_SIZE ,
BLOCK_SIZE(1024)  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(nullptr ,
ON_UPDATE(fix_thd_mem_root  
)
static

◆ Sys_query_prealloc_size

Sys_var_ulong Sys_query_prealloc_size("query_prealloc_size", "Persistent buffer for query parsing and execution", SESSION_VAR(query_prealloc_size), CMD_LINE(REQUIRED_ARG), VALID_RANGE(QUERY_ALLOC_PREALLOC_SIZE, ULONG_MAX), DEFAULT(QUERY_ALLOC_PREALLOC_SIZE), BLOCK_SIZE(1024), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(nullptr), DEPRECATED_VAR("")) ( "query_prealloc_size"  ,
"Persistent buffer for query parsing and execution"  ,
SESSION_VAR(query_prealloc_size)  ,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(QUERY_ALLOC_PREALLOC_SIZE, ULONG_MAX)  ,
DEFAULT(QUERY_ALLOC_PREALLOC_SIZE ,
BLOCK_SIZE(1024)  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(nullptr ,
ON_UPDATE(nullptr ,
DEPRECATED_VAR("")   
)
static

◆ Sys_quote_show_create

Sys_var_bit Sys_quote_show_create("sql_quote_show_create", "sql_quote_show_create", SESSION_VAR(option_bits), NO_CMD_LINE, OPTION_QUOTE_SHOW_CREATE, DEFAULT(true)) ( "sql_quote_show_create"  ,
"sql_quote_show_create"  ,
SESSION_VAR(option_bits)  ,
NO_CMD_LINE  ,
OPTION_QUOTE_SHOW_CREATE  ,
DEFAULT(true)   
)
static

◆ Sys_rand_seed1

Sys_var_session_special Sys_rand_seed1("rand_seed1", "Sets the internal state of the RAND() " "generator for replication purposes", sys_var::ONLY_SESSION, NO_CMD_LINE, VALID_RANGE(0, ULONG_MAX), BLOCK_SIZE(1), NO_MUTEX_GUARD, IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(update_rand_seed1), ON_READ(read_rand_seed)) ( "rand_seed1"  ,
"Sets the internal state of the RAND() " "generator for replication purposes"  ,
sys_var::ONLY_SESSION  ,
NO_CMD_LINE  ,
VALID_RANGE(0, ULONG_MAX)  ,
BLOCK_SIZE(1)  ,
NO_MUTEX_GUARD  ,
IN_BINLOG  ,
ON_CHECK(nullptr ,
ON_UPDATE(update_rand_seed1 ,
ON_READ(read_rand_seed  
)
static

◆ Sys_rand_seed2

Sys_var_session_special Sys_rand_seed2("rand_seed2", "Sets the internal state of the RAND() " "generator for replication purposes", sys_var::ONLY_SESSION, NO_CMD_LINE, VALID_RANGE(0, ULONG_MAX), BLOCK_SIZE(1), NO_MUTEX_GUARD, IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(update_rand_seed2), ON_READ(read_rand_seed)) ( "rand_seed2"  ,
"Sets the internal state of the RAND() " "generator for replication purposes"  ,
sys_var::ONLY_SESSION  ,
NO_CMD_LINE  ,
VALID_RANGE(0, ULONG_MAX)  ,
BLOCK_SIZE(1)  ,
NO_MUTEX_GUARD  ,
IN_BINLOG  ,
ON_CHECK(nullptr ,
ON_UPDATE(update_rand_seed2 ,
ON_READ(read_rand_seed  
)
static

◆ Sys_range_alloc_block_size

Sys_var_ulong Sys_range_alloc_block_size("range_alloc_block_size", "Allocation block size for storing ranges during optimization", HINT_UPDATEABLE SESSION_VAR(range_alloc_block_size), CMD_LINE(REQUIRED_ARG), VALID_RANGE(RANGE_ALLOC_BLOCK_SIZE, UINT32_MAX), DEFAULT(RANGE_ALLOC_BLOCK_SIZE), BLOCK_SIZE(1024)) ( "range_alloc_block_size"  ,
"Allocation block size for storing ranges during optimization"  ,
HINT_UPDATEABLE   SESSION_VARrange_alloc_block_size,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(RANGE_ALLOC_BLOCK_SIZE, UINT32_MAX ,
DEFAULT(RANGE_ALLOC_BLOCK_SIZE ,
BLOCK_SIZE(1024)   
)
static

◆ Sys_range_optimizer_max_mem_size

Sys_var_ulong Sys_range_optimizer_max_mem_size("range_optimizer_max_mem_size", "Maximum amount of memory used by the range optimizer " "to allocate predicates during range analysis. " "The larger the number, more memory may be consumed during " "range analysis. If the value is too low to completed range " "optimization of a query, index range scan will not be " "considered for this query. A value of 0 means range optimizer " "does not have any cap on memory. ", HINT_UPDATEABLE SESSION_VAR(range_optimizer_max_mem_size), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, ULONG_MAX), DEFAULT(8388608), BLOCK_SIZE(1)) ( "range_optimizer_max_mem_size"  ,
"Maximum amount of memory used by the range optimizer " "to allocate predicates during range analysis. " "The larger the  number,
more memory may be consumed during " "range analysis. If the value is too low to completed range " "optimization of a  query,
index range scan will not be " "considered for this query. A value of 0 means range optimizer " "does not have any cap on memory. "  ,
HINT_UPDATEABLE   SESSION_VARrange_optimizer_max_mem_size,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(0, ULONG_MAX)  ,
DEFAULT(8388608)  ,
BLOCK_SIZE(1)   
)
static

◆ Sys_read_buff_size

Sys_var_ulong Sys_read_buff_size("read_buffer_size", "Each thread that does a sequential scan allocates a buffer of " "this size for each table it scans. If you do many sequential scans, " "you may want to increase this value", HINT_UPDATEABLE SESSION_VAR(read_buff_size), CMD_LINE(REQUIRED_ARG), VALID_RANGE(IO_SIZE *2, INT_MAX32), DEFAULT(128 *1024), BLOCK_SIZE(IO_SIZE)) ( "read_buffer_size"  ,
"Each thread that does a sequential scan allocates a buffer of " "this size for each table it scans. If you do many sequential  scans,
" "you may want to increase this value"  ,
HINT_UPDATEABLE   SESSION_VARread_buff_size,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(IO_SIZE *2, INT_MAX32 ,
DEFAULT(128 *1024)  ,
BLOCK_SIZE(IO_SIZE  
)
static

◆ Sys_read_rnd_buff_size

Sys_var_ulong Sys_read_rnd_buff_size("read_rnd_buffer_size", "When reading rows in sorted order after a sort, the rows are read " "through this buffer to avoid a disk seeks", HINT_UPDATEABLE SESSION_VAR(read_rnd_buff_size), CMD_LINE(REQUIRED_ARG), VALID_RANGE(1, INT_MAX32), DEFAULT(256 *1024), BLOCK_SIZE(1)) ( "read_rnd_buffer_size"  ,
"When reading rows in sorted order after a  sort,
the rows are read " "through this buffer to avoid a disk seeks"  ,
HINT_UPDATEABLE   SESSION_VARread_rnd_buff_size,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(1, INT_MAX32 ,
DEFAULT(256 *1024)  ,
BLOCK_SIZE(1)   
)
static

◆ Sys_readonly

Sys_var_bool Sys_readonly("read_only", "Make all non-temporary tables read-only, with the exception for " "replication applier threads and users with the SUPER privilege.", GLOBAL_VAR(read_only), CMD_LINE(OPT_ARG), DEFAULT(false), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_read_only), ON_UPDATE(fix_read_only)) ( "read_only"  ,
"Make all non-temporary tables read-  only,
with the exception for " "replication applier threads and users with the SUPER privilege."  ,
GLOBAL_VAR(read_only ,
CMD_LINE(OPT_ARG ,
DEFAULT(false)  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(check_read_only ,
ON_UPDATE(fix_read_only  
)
static

The read_only boolean is always equal to the opt_readonly boolean except during fix_read_only(); when that function is entered, opt_readonly is the pre-update value and read_only is the post-update value.

fix_read_only() compares them and runs needed operations for the transition (especially when transitioning from false to true) and synchronizes both booleans in the end.

◆ Sys_regexp_stack_limit

Sys_var_int32 Sys_regexp_stack_limit("regexp_stack_limit", "Stack size limit for regular expressions matches", GLOBAL_VAR(opt_regexp_stack_limit), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, INT32_MAX), DEFAULT(8000000), BLOCK_SIZE(1)) ( "regexp_stack_limit"  ,
"Stack size limit for regular expressions matches"  ,
GLOBAL_VAR(opt_regexp_stack_limit ,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(0, INT32_MAX ,
DEFAULT(8000000)  ,
BLOCK_SIZE(1)   
)
static

◆ Sys_regexp_time_limit

Sys_var_int32 Sys_regexp_time_limit("regexp_time_limit", "Timeout for regular expressions matches, in steps of the match " "engine, typically on the order of milliseconds.", GLOBAL_VAR(opt_regexp_time_limit), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, INT32_MAX), DEFAULT(32), BLOCK_SIZE(1)) ( "regexp_time_limit"  ,
"Timeout for regular expressions  matches,
in steps of the match " "  engine,
typically on the order of milliseconds."  ,
GLOBAL_VAR(opt_regexp_time_limit ,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(0, INT32_MAX ,
DEFAULT(32)  ,
BLOCK_SIZE(1)   
)
static

◆ Sys_relay_log

Sys_var_charptr Sys_relay_log("relay_log", "The location and name to use for relay logs", READ_ONLY NON_PERSIST GLOBAL_VAR(opt_relay_logname), CMD_LINE(REQUIRED_ARG), IN_FS_CHARSET, DEFAULT(nullptr)) ( "relay_log"  ,
"The location and name to use for relay logs"  ,
READ_ONLY NON_PERSIST   GLOBAL_VARopt_relay_logname,
CMD_LINE(REQUIRED_ARG ,
IN_FS_CHARSET  ,
DEFAULT(nullptr  
)
static

◆ Sys_relay_log_basename

Sys_var_charptr Sys_relay_log_basename("relay_log_basename", "The full path of the relay log file names, excluding the extension.", READ_ONLY NON_PERSIST GLOBAL_VAR(relay_log_basename), NO_CMD_LINE, IN_FS_CHARSET, DEFAULT(nullptr)) ( "relay_log_basename"  ,
"The full path of the relay log file  names,
excluding the extension."  ,
READ_ONLY NON_PERSIST   GLOBAL_VARrelay_log_basename,
NO_CMD_LINE  ,
IN_FS_CHARSET  ,
DEFAULT(nullptr  
)
static

◆ Sys_relay_log_index

Sys_var_charptr Sys_relay_log_index("relay_log_index", "The location and name to use for the file " "that keeps a list of the last relay logs", READ_ONLY NON_PERSIST GLOBAL_VAR(relay_log_index), NO_CMD_LINE, IN_FS_CHARSET, DEFAULT(nullptr)) ( "relay_log_index"  ,
"The location and name to use for the file " "that keeps a list of the last relay logs"  ,
READ_ONLY NON_PERSIST   GLOBAL_VARrelay_log_index,
NO_CMD_LINE  ,
IN_FS_CHARSET  ,
DEFAULT(nullptr  
)
static

◆ Sys_relay_log_purge

Sys_var_bool Sys_relay_log_purge("relay_log_purge", "if disabled - do not purge relay logs. " "if enabled - purge them as soon as they are no more needed", GLOBAL_VAR(relay_log_purge), CMD_LINE(OPT_ARG), DEFAULT(true)) ( "relay_log_purge"  ,
"if disabled - do not purge relay logs. " "if enabled - purge them as soon as they are no more needed"  ,
GLOBAL_VAR(relay_log_purge ,
CMD_LINE(OPT_ARG ,
DEFAULT(true)   
)
static

◆ Sys_relay_log_recovery

Sys_var_bool Sys_relay_log_recovery("relay_log_recovery", "If enabled, existing relay logs will be skipped by the " "replication threads. The receiver will start a new relay " "log and the applier will start reading from the beginning of that file. " "The receiver's position relative to the source will be reset to the " "applier's " "position relative to the source; the receiver uses this in case " "SOURCE_AUTO_POSITION=0.", READ_ONLY GLOBAL_VAR(relay_log_recovery), CMD_LINE(OPT_ARG), DEFAULT(false)) ( "relay_log_recovery"  ,
"If  enabled 
)
static

◆ Sys_relay_log_space_limit

Sys_var_ulonglong Sys_relay_log_space_limit("relay_log_space_limit", "Maximum space to use for all relay logs", READ_ONLY GLOBAL_VAR(relay_log_space_limit), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, ULLONG_MAX), DEFAULT(0), BLOCK_SIZE(1)) ( "relay_log_space_limit"  ,
"Maximum space to use for all relay logs"  ,
READ_ONLY   GLOBAL_VARrelay_log_space_limit,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(0, ULLONG_MAX)  ,
DEFAULT(0)  ,
BLOCK_SIZE(1)   
)
static

◆ Sys_repl_report_host

Sys_var_charptr Sys_repl_report_host("report_host", "Hostname or IP that this replica will report to the source while " "initiating the replication connection. Will appear in the output of " "SHOW REPLICAS. Leave this unset if you do not want the replica to " "register itself with the source. Note that it is not sufficient for " "the source to simply read the IP of the replica off the socket once the " "replica connects: in the presence of NAT other routing features, that IP " "may not be valid for connecting to the replica from the source or other " "hosts.", READ_ONLY GLOBAL_VAR(report_host), CMD_LINE(REQUIRED_ARG), IN_FS_CHARSET, DEFAULT(nullptr)) ( "report_host"  ,
"Hostname or IP that this replica will report to the source while " "initiating the replication connection. Will appear in the output of " "SHOW REPLICAS. Leave this unset if you do not want the replica to " "register itself with the source. Note that it is not sufficient for " "the source to simply read the IP of the replica off the socket once the " "replica connects: in the presence of NAT other routing  features,
that IP " "may not be valid for connecting to the replica from the source or other " "hosts."  ,
READ_ONLY   GLOBAL_VARreport_host,
CMD_LINE(REQUIRED_ARG ,
IN_FS_CHARSET  ,
DEFAULT(nullptr  
)
static

◆ Sys_repl_report_password

Sys_var_charptr Sys_repl_report_password("report_password", "The account password that this replica will report to the source " "while initiating the replication connection.", READ_ONLY GLOBAL_VAR(report_password), CMD_LINE(REQUIRED_ARG), IN_FS_CHARSET, DEFAULT(nullptr)) ( "report_password"  ,
"The account password that this replica will report to the source " "while initiating the replication connection."  ,
READ_ONLY   GLOBAL_VARreport_password,
CMD_LINE(REQUIRED_ARG ,
IN_FS_CHARSET  ,
DEFAULT(nullptr  
)
static

◆ Sys_repl_report_port

Sys_var_uint Sys_repl_report_port("report_port", "The port for connecting to the replica, which this replica will report " "to the source while initiating the replication connection. " "Set it only if the replica is listening on a non-default " "port or if you have a special tunnel from the source or other clients " "to this replica. If not sure, leave this option unset.", READ_ONLY GLOBAL_VAR(report_port), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, 65535), DEFAULT(0), BLOCK_SIZE(1)) ( "report_port"  ,
"The port for connecting to the  replica,
which this replica will report " "to the source while initiating the replication connection. " "Set it only if the replica is listening on a non-default " "port or if you have a special tunnel from the source or other clients " "to this replica. If not  sure,
leave this option unset."  ,
READ_ONLY   GLOBAL_VARreport_port,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(0, 65535)  ,
DEFAULT(0)  ,
BLOCK_SIZE(1)   
)
static

◆ Sys_repl_report_user

Sys_var_charptr Sys_repl_report_user("report_user", "The account user name that this replica will report to the source " "while initiating the replication connection.", READ_ONLY GLOBAL_VAR(report_user), CMD_LINE(REQUIRED_ARG), IN_FS_CHARSET, DEFAULT(nullptr)) ( "report_user"  ,
"The account user name that this replica will report to the source " "while initiating the replication connection."  ,
READ_ONLY   GLOBAL_VARreport_user,
CMD_LINE(REQUIRED_ARG ,
IN_FS_CHARSET  ,
DEFAULT(nullptr  
)
static

◆ Sys_replica_allow_batching

Sys_var_bool Sys_replica_allow_batching("replica_allow_batching", "Allow this replica to batch requests when " "using the NDB storage engine.", GLOBAL_VAR(opt_replica_allow_batching), CMD_LINE(OPT_ARG), DEFAULT(true)) ( "replica_allow_batching"  ,
"Allow this replica to batch requests when " "using the NDB storage engine."  ,
GLOBAL_VAR(opt_replica_allow_batching ,
CMD_LINE(OPT_ARG ,
DEFAULT(true)   
)
static

◆ Sys_replica_checkpoint_group

Sys_var_uint Sys_replica_checkpoint_group("replica_checkpoint_group", "When using multi-threaded applier (replica_parallel_workers>0), it will " "update the worker progress status periodically. This option specifies " "the maximum number of committed transactions between updates.", GLOBAL_VAR(opt_mta_checkpoint_group), CMD_LINE(REQUIRED_ARG), VALID_RANGE(1, MTS_MAX_BITS_IN_GROUP), DEFAULT(512), BLOCK_SIZE(1)) ( "replica_checkpoint_group"  ,
"When using multi-threaded applier   replica_parallel_workers>0,
it will " "update the worker progress status periodically. This option specifies " "the maximum number of committed transactions between updates."  ,
GLOBAL_VAR(opt_mta_checkpoint_group ,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(1, MTS_MAX_BITS_IN_GROUP ,
DEFAULT(512)  ,
BLOCK_SIZE(1)   
)
static

◆ Sys_replica_checkpoint_period

Sys_var_uint Sys_replica_checkpoint_period("replica_checkpoint_period", "When using a multi-threaded applier (replica_parallel_workers>0), it " "will update the worker progress status periodically. This option " "specifies the maximum number of milliseconds between updates.", GLOBAL_VAR(opt_mta_checkpoint_period), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, UINT_MAX), DEFAULT(300), BLOCK_SIZE(1)) ( "replica_checkpoint_period"  ,
"When using a multi-threaded applier   replica_parallel_workers>0,
it " "will update the worker progress status periodically. This option " "specifies the maximum number of milliseconds between updates."  ,
GLOBAL_VAR(opt_mta_checkpoint_period ,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(0, UINT_MAX)  ,
DEFAULT(300)  ,
BLOCK_SIZE(1)   
)
static

◆ Sys_replica_compressed_protocol

Sys_var_bool Sys_replica_compressed_protocol("replica_compressed_protocol", "Use compression in the source/replica protocol.", GLOBAL_VAR(opt_replica_compressed_protocol), CMD_LINE(OPT_ARG), DEFAULT(false)) ( "replica_compressed_protocol"  ,
"Use compression in the source/replica protocol."  ,
GLOBAL_VAR(opt_replica_compressed_protocol ,
CMD_LINE(OPT_ARG ,
DEFAULT(false)   
)
static

◆ Sys_replica_exec_mode

Sys_var_enum Sys_replica_exec_mode("replica_exec_mode", "Modes for how replication events should be executed. Legal values " "are STRICT (default) and IDEMPOTENT. In IDEMPOTENT mode, " "replication will ignore duplicate key errors and key not found errors. " "In STRICT mode, replication will stop at those errors.", GLOBAL_VAR(replica_exec_mode_options), CMD_LINE(REQUIRED_ARG), replica_exec_mode_names, DEFAULT(RBR_EXEC_MODE_STRICT)) ( "replica_exec_mode"  ,
"Modes for how replication events should be executed. Legal values " "are STRICT (default) and IDEMPOTENT. In IDEMPOTENT  mode,
" "replication will ignore duplicate key errors and key not found errors. " "In STRICT  mode,
replication will stop at those errors."  ,
GLOBAL_VAR(replica_exec_mode_options ,
CMD_LINE(REQUIRED_ARG ,
replica_exec_mode_names  ,
DEFAULT(RBR_EXEC_MODE_STRICT  
)
static

◆ Sys_replica_load_tmpdir

Sys_var_charptr Sys_replica_load_tmpdir("replica_load_tmpdir", "The location where this replica will store temporary files when " "replicating a LOAD DATA INFILE command from a source having " "binlog_format=STATEMENT.", READ_ONLY NON_PERSIST GLOBAL_VAR(replica_load_tmpdir), CMD_LINE(REQUIRED_ARG), IN_FS_CHARSET, DEFAULT(nullptr)) ( "replica_load_tmpdir"  )
static

◆ Sys_replica_max_allowed_packet

Sys_var_ulong Sys_replica_max_allowed_packet("replica_max_allowed_packet", "The maximum size of packets sent from an upstream source server to this " "server.", GLOBAL_VAR(replica_max_allowed_packet), CMD_LINE(REQUIRED_ARG), VALID_RANGE(1024, mysql::binlog::event::max_log_event_size), DEFAULT(mysql::binlog::event::max_log_event_size), BLOCK_SIZE(1024)) ( "replica_max_allowed_packet"  ,
"The maximum size of packets sent from an upstream source server to this " "server."  ,
GLOBAL_VAR(replica_max_allowed_packet ,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(1024, mysql::binlog::event::max_log_event_size ,
DEFAULT(mysql::binlog::event::max_log_event_size ,
BLOCK_SIZE(1024)   
)
static

◆ Sys_replica_net_timeout

Sys_var_uint Sys_replica_net_timeout("replica_net_timeout", "Number of seconds to wait for more data " "from a replication connection before aborting the read.", GLOBAL_VAR(replica_net_timeout), CMD_LINE(REQUIRED_ARG), VALID_RANGE(1, LONG_TIMEOUT), DEFAULT(REPLICA_NET_TIMEOUT), BLOCK_SIZE(1), &PLock_replica_net_timeout, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(fix_replica_net_timeout)) ( "replica_net_timeout"  ,
"Number of seconds to wait for more data " "from a replication connection before aborting the read."  ,
GLOBAL_VAR(replica_net_timeout ,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(1, LONG_TIMEOUT ,
DEFAULT(REPLICA_NET_TIMEOUT ,
BLOCK_SIZE(1)  ,
PLock_replica_net_timeout,
NOT_IN_BINLOG  ,
ON_CHECK(nullptr ,
ON_UPDATE(fix_replica_net_timeout  
)
static

◆ Sys_replica_parallel_type

Sys_var_enum Sys_replica_parallel_type("replica_parallel_type", "The method used by the replication applier to parallelize " "transactions. DATABASE, indicates that it " "may apply transactions in parallel in case they update different " "databases. LOGICAL_CLOCK, which is the default, indicates that it decides " "whether two " "transactions can be applied in parallel using the logical timestamps " "computed by the source.", PERSIST_AS_READONLY GLOBAL_VAR(mts_parallel_option), CMD_LINE(REQUIRED_ARG, OPT_REPLICA_PARALLEL_TYPE), mts_parallel_type_names, DEFAULT(MTS_PARALLEL_TYPE_LOGICAL_CLOCK), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_slave_stopped), ON_UPDATE(nullptr), DEPRECATED_VAR("")) ( "replica_parallel_type"  ,
"The method used by the replication applier to parallelize " "transactions.  DATABASE,
indicates that it " "may apply transactions in parallel in case they update different " "databases.  LOGICAL_CLOCK,
which is the  default,
indicates that it decides " "whether two " "transactions can be applied in parallel using the logical timestamps " "computed by the source."  ,
PERSIST_AS_READONLY   GLOBAL_VARmts_parallel_option,
CMD_LINE(REQUIRED_ARG, OPT_REPLICA_PARALLEL_TYPE ,
mts_parallel_type_names  ,
DEFAULT(MTS_PARALLEL_TYPE_LOGICAL_CLOCK ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(check_slave_stopped ,
ON_UPDATE(nullptr ,
DEPRECATED_VAR("")   
)
static

◆ Sys_replica_parallel_workers

Sys_var_ulong Sys_replica_parallel_workers("replica_parallel_workers", "Number of worker threads for executing events in parallel ", PERSIST_AS_READONLY GLOBAL_VAR(opt_mts_replica_parallel_workers), CMD_LINE(REQUIRED_ARG, OPT_REPLICA_PARALLEL_WORKERS), VALID_RANGE(0, MTS_MAX_WORKERS), DEFAULT(4), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(replica_parallel_workers_update)) ( "replica_parallel_workers"  ,
"Number of worker threads for executing events in parallel "  ,
PERSIST_AS_READONLY   GLOBAL_VARopt_mts_replica_parallel_workers,
CMD_LINE(REQUIRED_ARG, OPT_REPLICA_PARALLEL_WORKERS ,
VALID_RANGE(0, MTS_MAX_WORKERS ,
DEFAULT(4)  ,
BLOCK_SIZE(1)  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(nullptr ,
ON_UPDATE(replica_parallel_workers_update  
)
static

◆ Sys_replica_pending_jobs_size_max

Sys_var_ulonglong Sys_replica_pending_jobs_size_max("replica_pending_jobs_size_max", "Soft limit on the size, in bytes, of per-worker queues of events that " "have not yet been applied. The queue size may exceed this limit in case " "a single event is bigger than the limit.", GLOBAL_VAR(opt_mts_pending_jobs_size_max), CMD_LINE(REQUIRED_ARG), VALID_RANGE(1024,(ulonglong) ~(intptr) 0), DEFAULT(128 *1024 *1024), BLOCK_SIZE(1024), ON_CHECK(nullptr)) ( "replica_pending_jobs_size_max"  ,
"Soft limit on the  size,
in  bytes,
of per-worker queues of events that " "have not yet been applied. The queue size may exceed this limit in case " "a single event is bigger than the limit."  ,
GLOBAL_VAR(opt_mts_pending_jobs_size_max ,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(1024,(ulonglong) ~(intptr) 0)  ,
DEFAULT(128 *1024 *1024)  ,
BLOCK_SIZE(1024)  ,
ON_CHECK(nullptr  
)
static

◆ Sys_replica_preserve_commit_order

Sys_var_bool Sys_replica_preserve_commit_order("replica_preserve_commit_order", "Force replication worker threads to commit in the same order as on the " "source. Enabled by default", PERSIST_AS_READONLY GLOBAL_VAR(opt_replica_preserve_commit_order), CMD_LINE(OPT_ARG, OPT_REPLICA_PRESERVE_COMMIT_ORDER), DEFAULT(true), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_slave_stopped), ON_UPDATE(nullptr)) ( "replica_preserve_commit_order"  ,
"Force replication worker threads to commit in the same order as on the " "source. Enabled by default"  ,
PERSIST_AS_READONLY   GLOBAL_VARopt_replica_preserve_commit_order,
CMD_LINE(OPT_ARG, OPT_REPLICA_PRESERVE_COMMIT_ORDER ,
DEFAULT(true)  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(check_slave_stopped ,
ON_UPDATE(nullptr  
)
static

◆ Sys_replica_skip_errors

Sys_var_charptr Sys_replica_skip_errors("replica_skip_errors", "Comma-separated list of error numbers. If an applier thread on this " "replica encounters one of these errors while applying a Query_log_event, " "it will ignore the error, rather than stop.", READ_ONLY GLOBAL_VAR(opt_replica_skip_errors), CMD_LINE(REQUIRED_ARG), IN_SYSTEM_CHARSET, DEFAULT(nullptr)) ( "replica_skip_errors"  ,
"Comma-separated list of error numbers. If an applier thread on this " "replica encounters one of these errors while applying a  Query_log_event,
" "it will ignore the  error,
rather than stop."  ,
READ_ONLY   GLOBAL_VARopt_replica_skip_errors,
CMD_LINE(REQUIRED_ARG ,
IN_SYSTEM_CHARSET  ,
DEFAULT(nullptr  
)
static

◆ Sys_replica_sql_verify_checksum

Sys_var_bool Sys_replica_sql_verify_checksum("replica_sql_verify_checksum", "Force checksum verification of replication events after reading them " "from relay log. Note: The replica always verifies checksums for events " "received from the network, if the event has a checksum at all, before " "it writes the event to the relay log. Enabled by default.", GLOBAL_VAR(opt_replica_sql_verify_checksum), CMD_LINE(OPT_ARG), DEFAULT(true)) ( "replica_sql_verify_checksum"  ,
"Force checksum verification of replication events after reading them " "from relay log. Note: The replica always verifies checksums for events " "received from the  network,
if the event has a checksum at  all,
before " "it writes the event to the relay log. Enabled by default."  ,
GLOBAL_VAR(opt_replica_sql_verify_checksum ,
CMD_LINE(OPT_ARG ,
DEFAULT(true)   
)
static

◆ Sys_replica_transaction_retries

Sys_var_ulong Sys_replica_transaction_retries("replica_transaction_retries", "Number of times the replication applier will retry a transaction in " "case it failed with a deadlock or other transient error, before it gives " "up and stops.", GLOBAL_VAR(slave_trans_retries), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, ULONG_MAX), DEFAULT(10), BLOCK_SIZE(1)) ( "replica_transaction_retries"  ,
"Number of times the replication applier will retry a transaction in " "case it failed with a deadlock or other transient  error,
before it gives " "up and stops."  ,
GLOBAL_VAR(slave_trans_retries ,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(0, ULONG_MAX)  ,
DEFAULT(10)  ,
BLOCK_SIZE(1)   
)
static

◆ Sys_replica_type_conversions

Sys_var_set Sys_replica_type_conversions("replica_type_conversions", "Set of type conversions that may be used by the replication applier " "thread for row events. Allowed values are:" " ALL_LOSSY to enable lossy conversions," " ALL_NON_LOSSY to enable non-lossy conversions," " ALL_UNSIGNED to treat all integer column type data to be unsigned " "values, and" " ALL_SIGNED to treat all integer column type data to be signed values." " Default treatment is ALL_SIGNED. If ALL_SIGNED and ALL_UNSIGNED both " "are" " specified, ALL_SIGNED will take higher priority than ALL_UNSIGNED." " If the variable is assigned the empty set, no conversions are" " allowed and it is expected that the types match exactly.", GLOBAL_VAR(replica_type_conversions_options), CMD_LINE(REQUIRED_ARG), replica_type_conversions_name, DEFAULT(0)) ( "replica_type_conversions"  ,
"Set of type conversions that may be used by the replication applier " "thread for row events. Allowed values are:" " ALL_LOSSY to enable lossy  conversions,
" " ALL_NON_LOSSY to enable non-lossy  conversions,
" " ALL_UNSIGNED to treat all integer column type data to be unsigned " "  values,
and" " ALL_SIGNED to treat all integer column type data to be signed values." " Default treatment is ALL_SIGNED. If ALL_SIGNED and ALL_UNSIGNED both " "are" "  specified,
ALL_SIGNED will take higher priority than ALL_UNSIGNED." " If the variable is assigned the empty  set,
no conversions are" " allowed and it is expected that the types match exactly."  ,
GLOBAL_VAR(replica_type_conversions_options ,
CMD_LINE(REQUIRED_ARG ,
replica_type_conversions_name  ,
DEFAULT(0)   
)
static

◆ Sys_replication_optimize_for_static_plugin_config

Sys_var_bool Sys_replication_optimize_for_static_plugin_config("replication_optimize_for_static_plugin_config", "Optional flag that blocks plugin install/uninstall and allows skipping " "the acquisition of the lock to read from the plugin list and the usage " "of read-optimized spin-locks. Use only when plugin hook callback needs " "optimization (a lot of semi-sync replicas, for instance).", GLOBAL_VAR(opt_replication_optimize_for_static_plugin_config), CMD_LINE(OPT_ARG), DEFAULT(false), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(handle_plugin_lock_type_change)) ( "replication_optimize_for_static_plugin_config"  ,
"Optional flag that blocks plugin install/uninstall and allows skipping " "the acquisition of the lock to read from the plugin list and the usage " "of read-optimized spin-locks. Use only when plugin hook callback needs " "optimization (a lot of semi-sync replicas, for instance)."  ,
GLOBAL_VAR(opt_replication_optimize_for_static_plugin_config ,
CMD_LINE(OPT_ARG ,
DEFAULT(false)  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(nullptr ,
ON_UPDATE(handle_plugin_lock_type_change  
)
static

◆ Sys_replication_sender_observe_commit_only

Sys_var_bool Sys_replication_sender_observe_commit_only("replication_sender_observe_commit_only", "Optional flag that allows for only calling back observer hooks at " "commit.", GLOBAL_VAR(opt_replication_sender_observe_commit_only), CMD_LINE(OPT_ARG), DEFAULT(false), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(nullptr)) ( "replication_sender_observe_commit_only"  ,
"Optional flag that allows for only calling back observer hooks at " "commit."  ,
GLOBAL_VAR(opt_replication_sender_observe_commit_only ,
CMD_LINE(OPT_ARG ,
DEFAULT(false)  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(nullptr ,
ON_UPDATE(nullptr  
)
static

◆ Sys_require_secure_transport

Sys_var_bool Sys_require_secure_transport("require_secure_transport", "When this option is enabled, connections attempted using insecure " "transport will be rejected. Secure transports are SSL/TLS, " "Unix socket or Shared Memory (on Windows).", GLOBAL_VAR(opt_require_secure_transport), CMD_LINE(OPT_ARG), DEFAULT(false), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_require_secure_transport), ON_UPDATE(nullptr)) ( "require_secure_transport"  ,
"When this option is  enabled,
connections attempted using insecure " "transport will be rejected. Secure transports are SSL/  TLS,
" "Unix socket or Shared Memory(on Windows)."  ,
GLOBAL_VAR(opt_require_secure_transport ,
CMD_LINE(OPT_ARG ,
DEFAULT(false)  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(check_require_secure_transport ,
ON_UPDATE(nullptr  
)
static

◆ Sys_resultset_metadata

Sys_var_enum Sys_resultset_metadata("resultset_metadata", "Controls what meatadata the server will send to the client: " "either FULL (default) for all metadata, NONE for no metadata.", SESSION_ONLY(resultset_metadata), NO_CMD_LINE, resultset_metadata_names, DEFAULT(static_cast< ulong >(RESULTSET_METADATA_FULL)), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_resultset_metadata), ON_UPDATE(nullptr)) ( "resultset_metadata"  ,
"Controls what meatadata the server will send to the client: " "either FULL (default) for all  metadata,
NONE for no metadata."  ,
SESSION_ONLY(resultset_metadata)  ,
NO_CMD_LINE  ,
resultset_metadata_names  ,
DEFAULT(static_cast< ulong >(RESULTSET_METADATA_FULL))  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(check_resultset_metadata ,
ON_UPDATE(nullptr  
)
static

◆ Sys_rpl_read_size

Sys_var_ulong Sys_rpl_read_size("rpl_read_size", "The size for reads done from the binlog and relay log. " "It must be a multiple of 4kb. Making it larger might help with IO " "stalls while reading these files when they are not in the OS buffer " "cache", GLOBAL_VAR(rpl_read_size), CMD_LINE(REQUIRED_ARG), VALID_RANGE(IO_SIZE *2, ULONG_MAX), DEFAULT(IO_SIZE *2), BLOCK_SIZE(IO_SIZE)) ( "rpl_read_size"  ,
"The size for reads done from the binlog and relay log. " "It must be a multiple of 4kb. Making it larger might help with IO " "stalls while reading these files when they are not in the OS buffer " "cache"  ,
GLOBAL_VAR(rpl_read_size ,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(IO_SIZE *2, ULONG_MAX)  ,
DEFAULT(IO_SIZE *2)  ,
BLOCK_SIZE(IO_SIZE  
)
static

◆ Sys_rpl_stop_replica_timeout

Sys_var_ulong Sys_rpl_stop_replica_timeout("rpl_stop_replica_timeout", "Timeout in seconds to wait for replication threads to stop, before " "STOP REPLICA returns a warning.", GLOBAL_VAR(rpl_stop_replica_timeout), CMD_LINE(REQUIRED_ARG), VALID_RANGE(2, LONG_TIMEOUT), DEFAULT(LONG_TIMEOUT), BLOCK_SIZE(1)) ( "rpl_stop_replica_timeout"  ,
"Timeout in seconds to wait for replication threads to  stop,
before " "STOP REPLICA returns a warning."  ,
GLOBAL_VAR(rpl_stop_replica_timeout ,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(2, LONG_TIMEOUT ,
DEFAULT(LONG_TIMEOUT ,
BLOCK_SIZE(1)   
)
static

◆ Sys_rpl_stop_slave_timeout

Sys_var_deprecated_alias Sys_rpl_stop_slave_timeout("rpl_stop_slave_timeout", Sys_rpl_stop_replica_timeout) ( "rpl_stop_slave_timeout"  ,
Sys_rpl_stop_replica_timeout   
)
static

◆ Sys_safe_updates

Sys_var_bit Sys_safe_updates("sql_safe_updates", "sql_safe_updates", HINT_UPDATEABLE SESSION_VAR(option_bits), NO_CMD_LINE, OPTION_SAFE_UPDATES, DEFAULT(false)) ( "sql_safe_updates"  ,
"sql_safe_updates"  ,
HINT_UPDATEABLE   SESSION_VARoption_bits,
NO_CMD_LINE  ,
OPTION_SAFE_UPDATES  ,
DEFAULT(false)   
)
static

◆ Sys_schema_def_size

Sys_var_ulong Sys_schema_def_size("schema_definition_cache", "The number of cached schema definitions", GLOBAL_VAR(schema_def_size), CMD_LINE(REQUIRED_ARG), VALID_RANGE(SCHEMA_DEF_CACHE_MIN, 512 *1024), DEFAULT(SCHEMA_DEF_CACHE_DEFAULT), BLOCK_SIZE(1)) ( "schema_definition_cache"  ,
"The number of cached schema definitions"  ,
GLOBAL_VAR(schema_def_size ,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(SCHEMA_DEF_CACHE_MIN, 512 *1024)  ,
DEFAULT(SCHEMA_DEF_CACHE_DEFAULT ,
BLOCK_SIZE(1)   
)
static

◆ Sys_secondary_engine_cost_threshold

Sys_var_double Sys_secondary_engine_cost_threshold("secondary_engine_cost_threshold", "Controls which statements to consider for execution in a secondary " "storage engine. Only statements that have a cost estimate higher than " "this value will be attempted executed in a secondary storage engine.", HINT_UPDATEABLE SESSION_VAR(secondary_engine_cost_threshold), CMD_LINE(OPT_ARG), VALID_RANGE(0, DBL_MAX), DEFAULT(100000), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(nullptr)) ( "secondary_engine_cost_threshold"  ,
"Controls which statements to consider for execution in a secondary " "storage engine. Only statements that have a cost estimate higher than " "this value will be attempted executed in a secondary storage engine."  ,
HINT_UPDATEABLE   SESSION_VARsecondary_engine_cost_threshold,
CMD_LINE(OPT_ARG ,
VALID_RANGE(0, DBL_MAX)  ,
DEFAULT(100000)  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(nullptr ,
ON_UPDATE(nullptr  
)
static

Cost threshold for executing queries in a secondary storage engine.

Only queries that have an estimated cost above this value will be attempted executed in a secondary storage engine.

Secondary storage engines are meant to accelerate queries that would otherwise take a relatively long time to execute. If a secondary storage engine accepts a query, it is assumed that it will be able to accelerate it. However, if the estimated cost of the query is low, the query will execute fast in the primary engine too, so there is little to gain by offloading the query to the secondary engine.

The default value aims to avoid use of secondary storage engines for queries that could be executed by the primary engine in a few tenths of seconds or less, and attempt to use secondary storage engines for queries would take seconds or more.

◆ Sys_secure_file_priv

Sys_var_charptr Sys_secure_file_priv("secure_file_priv", "Limit LOAD DATA, SELECT ... OUTFILE, and LOAD_FILE() to files " "within specified directory", READ_ONLY NON_PERSIST GLOBAL_VAR(opt_secure_file_priv), CMD_LINE(REQUIRED_ARG), IN_FS_CHARSET, DEFAULT(DEFAULT_SECURE_FILE_PRIV_DIR)) ( "secure_file_priv"  ,
"Limit LOAD  DATA,
SELECT ...  OUTFILE,
and LOAD_FILE() to files " "within specified directory"  ,
READ_ONLY NON_PERSIST   GLOBAL_VARopt_secure_file_priv,
CMD_LINE(REQUIRED_ARG ,
IN_FS_CHARSET  ,
DEFAULT(DEFAULT_SECURE_FILE_PRIV_DIR  
)
static

◆ Sys_select_into_buffer_size

Sys_var_ulong Sys_select_into_buffer_size("select_into_buffer_size", "Buffer size for SELECT INTO OUTFILE/DUMPFILE.", HINT_UPDATEABLE SESSION_VAR(select_into_buffer_size), CMD_LINE(OPT_ARG), VALID_RANGE(IO_SIZE *2, INT_MAX32), DEFAULT(128 *1024), BLOCK_SIZE(IO_SIZE), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_session_admin_no_super)) ( "select_into_buffer_size"  ,
"Buffer size for SELECT INTO OUTFILE/DUMPFILE."  ,
HINT_UPDATEABLE   SESSION_VARselect_into_buffer_size,
CMD_LINE(OPT_ARG ,
VALID_RANGE(IO_SIZE *2, INT_MAX32 ,
DEFAULT(128 *1024)  ,
BLOCK_SIZE(IO_SIZE ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(check_session_admin_no_super  
)
static

◆ Sys_select_into_disk_sync

Sys_var_bool Sys_select_into_disk_sync("select_into_disk_sync", "Synchronize flushed buffer with disk for SELECT INTO OUTFILE/DUMPFILE.", HINT_UPDATEABLE SESSION_VAR(select_into_disk_sync), CMD_LINE(OPT_ARG), DEFAULT(false)) ( "select_into_disk_sync"  ,
"Synchronize flushed buffer with disk for SELECT INTO OUTFILE/DUMPFILE."  ,
HINT_UPDATEABLE   SESSION_VARselect_into_disk_sync,
CMD_LINE(OPT_ARG ,
DEFAULT(false)   
)
static

◆ Sys_select_into_disk_sync_delay

Sys_var_uint Sys_select_into_disk_sync_delay("select_into_disk_sync_delay", "The delay in milliseconds after each buffer sync " "for SELECT INTO OUTFILE/DUMPFILE. Requires select_into_sync_disk = ON.", HINT_UPDATEABLE SESSION_VAR(select_into_disk_sync_delay), CMD_LINE(OPT_ARG), VALID_RANGE(0, LONG_TIMEOUT), DEFAULT(0), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_session_admin_no_super)) ( "select_into_disk_sync_delay"  )
static

◆ Sys_select_limit

Sys_var_harows Sys_select_limit("sql_select_limit", "The maximum number of rows to return from SELECT statements", HINT_UPDATEABLE SESSION_VAR(select_limit), NO_CMD_LINE, VALID_RANGE(0, HA_POS_ERROR), DEFAULT(HA_POS_ERROR), BLOCK_SIZE(1)) ( "sql_select_limit"  ,
"The maximum number of rows to return from SELECT statements"  ,
HINT_UPDATEABLE   SESSION_VARselect_limit,
NO_CMD_LINE  ,
VALID_RANGE(0, HA_POS_ERROR ,
DEFAULT(HA_POS_ERROR ,
BLOCK_SIZE(1)   
)
static

◆ Sys_server_build_id

Sys_var_charptr Sys_server_build_id("build_id", "A unique Build ID generated by the linker, a 160 bit sha1 signature.", READ_ONLY NON_PERSIST GLOBAL_VAR(server_build_id_ptr), NO_CMD_LINE, IN_FS_CHARSET, DEFAULT(server_build_id)) ( "build_id"  ,
"A unique Build ID generated by the  linker,
a 160 bit sha1 signature."  ,
READ_ONLY NON_PERSIST   GLOBAL_VARserver_build_id_ptr,
NO_CMD_LINE  ,
IN_FS_CHARSET  ,
DEFAULT(server_build_id  
)
static

◆ Sys_server_id

Sys_var_ulong Sys_server_id("server_id", "Uniquely identifies the server instance in the community of " "replication partners", PERSIST_AS_READONLY GLOBAL_VAR(server_id), CMD_LINE(REQUIRED_ARG, OPT_SERVER_ID), VALID_RANGE(0, UINT_MAX32), DEFAULT(1), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(fix_server_id)) ( "server_id"  ,
"Uniquely identifies the server instance in the community of " "replication partners"  ,
PERSIST_AS_READONLY   GLOBAL_VARserver_id,
CMD_LINE(REQUIRED_ARG, OPT_SERVER_ID ,
VALID_RANGE(0, UINT_MAX32 ,
DEFAULT(1)  ,
BLOCK_SIZE(1)  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(nullptr ,
ON_UPDATE(fix_server_id  
)
static

◆ Sys_server_id_bits

Sys_var_uint Sys_server_id_bits("server_id_bits", "Set number of significant bits in server-id", GLOBAL_VAR(opt_server_id_bits), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, 32), DEFAULT(32), BLOCK_SIZE(1)) ( "server_id_bits"  ,
"Set number of significant bits in server-id ,
GLOBAL_VAR(opt_server_id_bits ,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(0, 32)  ,
DEFAULT(32)  ,
BLOCK_SIZE(1)   
)
static

◆ Sys_server_uuid

Sys_var_charptr Sys_server_uuid("server_uuid", "Uniquely identifies the server instance in the universe", READ_ONLY NON_PERSIST GLOBAL_VAR(server_uuid_ptr), NO_CMD_LINE, IN_FS_CHARSET, DEFAULT(server_uuid)) ( "server_uuid"  ,
"Uniquely identifies the server instance in the universe"  ,
READ_ONLY NON_PERSIST   GLOBAL_VARserver_uuid_ptr,
NO_CMD_LINE  ,
IN_FS_CHARSET  ,
DEFAULT(server_uuid  
)
static

◆ Sys_session_track_gtids

Sys_var_enum Sys_session_track_gtids("session_track_gtids", "Controls the amount of global transaction ids to be " "included in the response packet sent by the server." "(Default: OFF).", SESSION_VAR(session_track_gtids), CMD_LINE(REQUIRED_ARG), session_track_gtids_names, DEFAULT(SESSION_TRACK_GTIDS_OFF), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_outside_trx), ON_UPDATE(on_session_track_gtids_update)) ( "session_track_gtids"  ,
"Controls the amount of global transaction ids to be " "included in the response packet sent by the server." "(Default: OFF)."  ,
SESSION_VAR(session_track_gtids)  ,
CMD_LINE(REQUIRED_ARG ,
session_track_gtids_names  ,
DEFAULT(SESSION_TRACK_GTIDS_OFF ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(check_outside_trx ,
ON_UPDATE(on_session_track_gtids_update  
)
static

◆ Sys_session_track_schema

Sys_var_bool Sys_session_track_schema("session_track_schema", "Track changes to the 'default schema'.", SESSION_VAR(session_track_schema), CMD_LINE(OPT_ARG), DEFAULT(true), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(update_session_track_schema)) ( "session_track_schema"  ,
"Track changes to the 'default schema'."  ,
SESSION_VAR(session_track_schema)  ,
CMD_LINE(OPT_ARG ,
DEFAULT(true)  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(nullptr ,
ON_UPDATE(update_session_track_schema  
)
static

◆ Sys_session_track_state_change

Sys_var_bool Sys_session_track_state_change("session_track_state_change", "Track changes to the 'session state'.", SESSION_VAR(session_track_state_change), CMD_LINE(OPT_ARG), DEFAULT(false), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(update_session_track_state_change)) ( "session_track_state_change"  ,
"Track changes to the 'session state'."  ,
SESSION_VAR(session_track_state_change)  ,
CMD_LINE(OPT_ARG ,
DEFAULT(false)  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(nullptr ,
ON_UPDATE(update_session_track_state_change  
)
static

◆ Sys_session_track_transaction_info

Sys_var_enum Sys_session_track_transaction_info("session_track_transaction_info", "Track changes to the transaction attributes. OFF to disable; " "STATE to track just transaction state (Is there an active transaction? " "Does it have any data? etc.); CHARACTERISTICS to track transaction " "state " "and report all statements needed to start a transaction with the same " "characteristics (isolation level, read only/read write, snapshot - " "but not any work done / data modified within the transaction).", SESSION_VAR(session_track_transaction_info), CMD_LINE(REQUIRED_ARG), session_track_transaction_info_names, DEFAULT(TX_TRACK_NONE), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(update_session_track_tx_info)) ( "session_track_transaction_info"  ,
"Track changes to the transaction attributes. OFF to disable; " "STATE to track just transaction state (Is there an active transaction? " "Does it have any data? etc.); CHARACTERISTICS to track transaction " "state " "and report all statements needed to start a transaction with the same " "characteristics (isolation level, read only/read write, snapshot - " "but not any work done / data modified within the transaction)."  ,
SESSION_VAR(session_track_transaction_info)  ,
CMD_LINE(REQUIRED_ARG ,
session_track_transaction_info_names  ,
DEFAULT(TX_TRACK_NONE ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(nullptr ,
ON_UPDATE(update_session_track_tx_info  
)
static

◆ Sys_set_operations_buffer_size

Sys_var_ulonglong Sys_set_operations_buffer_size("set_operations_buffer_size", "The maximum size of the buffer used for hash based set operations ", HINT_UPDATEABLE SESSION_VAR(set_operations_buffer_size), CMD_LINE(REQUIRED_ARG), VALID_RANGE(16384, max_mem_sz), DEFAULT(256ULL *1024), BLOCK_SIZE(128)) ( "set_operations_buffer_size"  ,
"The maximum size of the buffer used for hash based set operations "  ,
HINT_UPDATEABLE   SESSION_VARset_operations_buffer_size,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(16384, max_mem_sz ,
DEFAULT(256ULL *1024)  ,
BLOCK_SIZE(128)   
)
static

◆ Sys_sha256_password_proxy_users

Sys_var_bool Sys_sha256_password_proxy_users("sha256_password_proxy_users", "If set to FALSE (the default), then the sha256_password authentication " "plugin will not signal for authenticated users to be checked for " "mapping " "to proxy users. When set to TRUE, the plugin will flag associated " "authenticated accounts to be mapped to proxy users when the server " "option " "check_proxy_users is enabled.", GLOBAL_VAR(sha256_password_proxy_users), CMD_LINE(OPT_ARG), DEFAULT(false)) ( "sha256_password_proxy_users"  ,
"If set to FALSE   the default,
then the sha256_password authentication " "plugin will not signal for authenticated users to be checked for " "mapping " "to proxy users. When set to  TRUE,
the plugin will flag associated " "authenticated accounts to be mapped to proxy users when the server " "option " "check_proxy_users is enabled."  ,
GLOBAL_VAR(sha256_password_proxy_users ,
CMD_LINE(OPT_ARG ,
DEFAULT(false)   
)
static

◆ Sys_show_create_table_verbosity

Sys_var_bool Sys_show_create_table_verbosity("show_create_table_verbosity", "When this option is enabled, it increases the verbosity of " "'SHOW CREATE TABLE'.", SESSION_VAR(show_create_table_verbosity), CMD_LINE(OPT_ARG), DEFAULT(false), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(nullptr)) ( "show_create_table_verbosity"  ,
"When this option is  enabled,
it increases the verbosity of " " 'SHOW CREATE TABLE'."  ,
SESSION_VAR(show_create_table_verbosity)  ,
CMD_LINE(OPT_ARG ,
DEFAULT(false)  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(nullptr ,
ON_UPDATE(nullptr  
)
static

◆ Sys_show_gipk_in_create_table_and_information_schema

Sys_var_bool Sys_show_gipk_in_create_table_and_information_schema("show_gipk_in_create_table_and_information_schema", "When set, if a primary key is generated for a table then SHOW commands " "and INFORMATION_SCHEMA tables shows generated invisible primary key " "definition.", SESSION_VAR(show_gipk_in_create_table_and_information_schema), CMD_LINE(OPT_ARG), DEFAULT(true), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(nullptr)) ( "show_gipk_in_create_table_and_information_schema"  ,
"When  set,
if a primary key is generated for a table then SHOW commands " "and INFORMATION_SCHEMA tables shows generated invisible primary key " "definition."  ,
SESSION_VAR(show_gipk_in_create_table_and_information_schema)  ,
CMD_LINE(OPT_ARG ,
DEFAULT(true)  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(nullptr ,
ON_UPDATE(nullptr  
)
static

◆ Sys_skip_external_locking

Sys_var_bool Sys_skip_external_locking("skip_external_locking", "Don't use system (external) locking", READ_ONLY NON_PERSIST GLOBAL_VAR(my_disable_locking), NO_CMD_LINE, DEFAULT(true)) ( "skip_external_locking"  ,
"Don't use system (external) locking"  ,
READ_ONLY NON_PERSIST   GLOBAL_VARmy_disable_locking,
NO_CMD_LINE  ,
DEFAULT(true)   
)
static

◆ Sys_skip_name_resolve

Sys_var_bool Sys_skip_name_resolve("skip_name_resolve", "Don't resolve hostnames. All hostnames are IP's or 'localhost'.", READ_ONLY GLOBAL_VAR(opt_skip_name_resolve), CMD_LINE(OPT_ARG, OPT_SKIP_RESOLVE), DEFAULT(false)) ( "skip_name_resolve"  ,
"Don't resolve hostnames. All hostnames are IP's or 'localhost'."  ,
READ_ONLY   GLOBAL_VARopt_skip_name_resolve,
CMD_LINE(OPT_ARG, OPT_SKIP_RESOLVE ,
DEFAULT(false)   
)
static

◆ Sys_skip_networking

Sys_var_bool Sys_skip_networking("skip_networking", "Don't allow connection with TCP/IP", READ_ONLY NON_PERSIST GLOBAL_VAR(opt_disable_networking), CMD_LINE(OPT_ARG), DEFAULT(false)) ( "skip_networking"  ,
"Don't allow connection with TCP/IP"  ,
READ_ONLY NON_PERSIST   GLOBAL_VARopt_disable_networking,
CMD_LINE(OPT_ARG ,
DEFAULT(false)   
)
static

◆ Sys_skip_replica_start

Sys_var_bool Sys_skip_replica_start("skip_replica_start", "Do not start replication threads automatically " "when the server starts.", READ_ONLY GLOBAL_VAR(opt_skip_replica_start), CMD_LINE(OPT_ARG), DEFAULT(false), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(nullptr)) ( "skip_replica_start"  ,
"Do not start replication threads automatically " "when the server starts."  ,
READ_ONLY   GLOBAL_VARopt_skip_replica_start,
CMD_LINE(OPT_ARG ,
DEFAULT(false)  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(nullptr ,
ON_UPDATE(nullptr  
)
static

◆ Sys_skip_show_database

Sys_var_bool Sys_skip_show_database("skip_show_database", "Don't allow 'SHOW DATABASE' commands", READ_ONLY GLOBAL_VAR(opt_skip_show_db), CMD_LINE(OPT_ARG), DEFAULT(false)) ( "skip_show_database"  ,
"Don't allow 'SHOW DATABASE' commands ,
READ_ONLY   GLOBAL_VARopt_skip_show_db,
CMD_LINE(OPT_ARG ,
DEFAULT(false)   
)
static

◆ Sys_skip_slave_start

Sys_var_deprecated_alias Sys_skip_slave_start("skip_slave_start", Sys_skip_replica_start) ( "skip_slave_start"  ,
Sys_skip_replica_start   
)
static

◆ Sys_slave_allow_batching

Sys_var_deprecated_alias Sys_slave_allow_batching("slave_allow_batching", Sys_replica_allow_batching) ( "slave_allow_batching"  ,
Sys_replica_allow_batching   
)
static

◆ Sys_slave_checkpoint_group

Sys_var_deprecated_alias Sys_slave_checkpoint_group("slave_checkpoint_group", Sys_replica_checkpoint_group) ( "slave_checkpoint_group"  ,
Sys_replica_checkpoint_group   
)
static

◆ Sys_slave_checkpoint_period

Sys_var_deprecated_alias Sys_slave_checkpoint_period("slave_checkpoint_period", Sys_replica_checkpoint_period) ( "slave_checkpoint_period"  ,
Sys_replica_checkpoint_period   
)
static

◆ Sys_slave_compressed_protocol

Sys_var_deprecated_alias Sys_slave_compressed_protocol("slave_compressed_protocol", Sys_replica_compressed_protocol) ( "slave_compressed_protocol"  ,
Sys_replica_compressed_protocol   
)
static

◆ Sys_slave_exec_mode

Sys_var_deprecated_alias Sys_slave_exec_mode("slave_exec_mode", Sys_replica_exec_mode) ( "slave_exec_mode"  ,
Sys_replica_exec_mode   
)
static

◆ Sys_slave_load_tmpdir

Sys_var_deprecated_alias Sys_slave_load_tmpdir("slave_load_tmpdir", Sys_replica_load_tmpdir) ( "slave_load_tmpdir"  ,
Sys_replica_load_tmpdir   
)
static

◆ Sys_slave_max_allowed_packet

Sys_var_deprecated_alias Sys_slave_max_allowed_packet("slave_max_allowed_packet", Sys_replica_max_allowed_packet) ( "slave_max_allowed_packet"  ,
Sys_replica_max_allowed_packet   
)
static

◆ Sys_slave_net_timeout

Sys_var_deprecated_alias Sys_slave_net_timeout("slave_net_timeout", Sys_replica_net_timeout) ( "slave_net_timeout"  ,
Sys_replica_net_timeout   
)
static

◆ Sys_slave_parallel_type

Sys_var_deprecated_alias Sys_slave_parallel_type("slave_parallel_type", Sys_replica_parallel_type) ( "slave_parallel_type"  ,
Sys_replica_parallel_type   
)
static

◆ Sys_slave_parallel_workers

Sys_var_deprecated_alias Sys_slave_parallel_workers("slave_parallel_workers", Sys_replica_parallel_workers) ( "slave_parallel_workers"  ,
Sys_replica_parallel_workers   
)
static

◆ Sys_slave_pending_jobs_size_max

Sys_var_deprecated_alias Sys_slave_pending_jobs_size_max("slave_pending_jobs_size_max", Sys_replica_pending_jobs_size_max) ( "slave_pending_jobs_size_max"  ,
Sys_replica_pending_jobs_size_max   
)
static

◆ Sys_slave_preserve_commit_order

Sys_var_deprecated_alias Sys_slave_preserve_commit_order("slave_preserve_commit_order", Sys_replica_preserve_commit_order) ( "slave_preserve_commit_order"  ,
Sys_replica_preserve_commit_order   
)
static

◆ Sys_slave_skip_errors

Sys_var_deprecated_alias Sys_slave_skip_errors("slave_skip_errors", Sys_replica_skip_errors) ( "slave_skip_errors"  ,
Sys_replica_skip_errors   
)
static

◆ Sys_slave_sql_verify_checksum

Sys_var_deprecated_alias Sys_slave_sql_verify_checksum("slave_sql_verify_checksum", Sys_replica_sql_verify_checksum) ( "slave_sql_verify_checksum"  ,
Sys_replica_sql_verify_checksum   
)
static

◆ Sys_slave_transaction_retries

Sys_var_deprecated_alias Sys_slave_transaction_retries("slave_transaction_retries", Sys_replica_transaction_retries) ( "slave_transaction_retries"  ,
Sys_replica_transaction_retries   
)
static

◆ Sys_slave_type_conversions

Sys_var_deprecated_alias Sys_slave_type_conversions("slave_type_conversions", Sys_replica_type_conversions) ( "slave_type_conversions"  ,
Sys_replica_type_conversions   
)
static

◆ Sys_slow_launch_time

Sys_var_ulong Sys_slow_launch_time("slow_launch_time", "If creating the thread takes longer than this value (in seconds), " "the Slow_launch_threads counter will be incremented", GLOBAL_VAR(slow_launch_time), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, LONG_TIMEOUT), DEFAULT(2), BLOCK_SIZE(1)) ( "slow_launch_time"  ,
"If creating the thread takes longer than this value   in seconds,
" "the Slow_launch_threads counter will be incremented"  ,
GLOBAL_VAR(slow_launch_time ,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(0, LONG_TIMEOUT ,
DEFAULT(2)  ,
BLOCK_SIZE(1)   
)
static

◆ Sys_slow_log_extra

Sys_var_bool Sys_slow_log_extra("log_slow_extra", "Print more attributes to the slow query log file. Has no effect on " "logging to table.", GLOBAL_VAR(opt_log_slow_extra), CMD_LINE(OPT_ARG), DEFAULT(false), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_slow_log_extra), ON_UPDATE(nullptr)) ( "log_slow_extra"  ,
"Print more attributes to the slow query log file. Has no effect on " "logging to table."  ,
GLOBAL_VAR(opt_log_slow_extra ,
CMD_LINE(OPT_ARG ,
DEFAULT(false)  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(check_slow_log_extra ,
ON_UPDATE(nullptr  
)
static

◆ Sys_slow_log_path

Sys_var_charptr Sys_slow_log_path("slow_query_log_file", "Log slow queries to given log file. " "Defaults logging to hostname-slow.log. Must be enabled to activate " "other slow log options", GLOBAL_VAR(opt_slow_logname), CMD_LINE(REQUIRED_ARG), IN_FS_CHARSET, DEFAULT(nullptr), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_log_path), ON_UPDATE(fix_slow_log_file)) ( "slow_query_log_file"  ,
"Log slow queries to given log file. " "Defaults logging to hostname-slow.log. Must be enabled to activate " "other slow log options ,
GLOBAL_VAR(opt_slow_logname ,
CMD_LINE(REQUIRED_ARG ,
IN_FS_CHARSET  ,
DEFAULT(nullptr ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(check_log_path ,
ON_UPDATE(fix_slow_log_file  
)
static

◆ Sys_slow_query_log

Sys_var_bool Sys_slow_query_log("slow_query_log", "Log slow queries to a table or log file. Defaults logging to a file " "hostname-slow.log or a table mysql.slow_log if --log-output=TABLE is " "used. Must be enabled to activate other slow log options", GLOBAL_VAR(opt_slow_log), CMD_LINE(OPT_ARG), DEFAULT(false), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(fix_slow_log_state)) ( "slow_query_log"  )
static

◆ Sys_socket

Sys_var_charptr Sys_socket("socket", "Socket file to use for connection", READ_ONLY NON_PERSIST GLOBAL_VAR(mysqld_unix_port), CMD_LINE(REQUIRED_ARG), IN_FS_CHARSET, DEFAULT(nullptr)) ( "socket"  ,
"Socket file to use for connection"  ,
READ_ONLY NON_PERSIST   GLOBAL_VARmysqld_unix_port,
CMD_LINE(REQUIRED_ARG ,
IN_FS_CHARSET  ,
DEFAULT(nullptr  
)
static

◆ Sys_sort_buffer

Sys_var_ulong Sys_sort_buffer("sort_buffer_size", "Each thread that needs to do a sort allocates a buffer of this size", HINT_UPDATEABLE SESSION_VAR(sortbuff_size), CMD_LINE(REQUIRED_ARG), VALID_RANGE(MIN_SORT_MEMORY, ULONG_MAX), DEFAULT(DEFAULT_SORT_MEMORY), BLOCK_SIZE(1)) ( "sort_buffer_size"  ,
"Each thread that needs to do a sort allocates a buffer of this size"  ,
HINT_UPDATEABLE   SESSION_VARsortbuff_size,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(MIN_SORT_MEMORY, ULONG_MAX)  ,
DEFAULT(DEFAULT_SORT_MEMORY ,
BLOCK_SIZE(1)   
)
static

◆ Sys_source_verify_checksum

Sys_var_bool Sys_source_verify_checksum("source_verify_checksum", "Force checksum verification of events in binary log before " "sending them to replicas or printing them in output of SHOW BINLOG " "EVENTS. " "Disabled by default.", GLOBAL_VAR(opt_source_verify_checksum), CMD_LINE(OPT_ARG), DEFAULT(false)) ( "source_verify_checksum"  ,
"Force checksum verification of events in binary log before " "sending them to replicas or printing them in output of SHOW BINLOG " "EVENTS. " "Disabled by default."  ,
GLOBAL_VAR(opt_source_verify_checksum ,
CMD_LINE(OPT_ARG ,
DEFAULT(false)   
)
static

◆ Sys_sp_cache_size

Sys_var_ulong Sys_sp_cache_size("stored_program_cache", "The soft upper limit for number of cached stored routines for " "one connection.", GLOBAL_VAR(stored_program_cache_size), CMD_LINE(REQUIRED_ARG), VALID_RANGE(16, 512 *1024), DEFAULT(256), BLOCK_SIZE(1)) ( "stored_program_cache"  ,
"The soft upper limit for number of cached stored routines for " "one connection."  ,
GLOBAL_VAR(stored_program_cache_size ,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(16, 512 *1024)  ,
DEFAULT(256)  ,
BLOCK_SIZE(1)   
)
static

◆ Sys_sql_generate_invisible_primary_key

Sys_var_bool Sys_sql_generate_invisible_primary_key("sql_generate_invisible_primary_key", "When set, if a table is created without a primary key then server " "generates invisible auto-increment column as a primary key for the table.", SESSION_VAR(sql_generate_invisible_primary_key), CMD_LINE(OPT_ARG), DEFAULT(false), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_session_admin), ON_UPDATE(nullptr)) ( "sql_generate_invisible_primary_key"  ,
"When  set,
if a table is created without a primary key then server " "generates invisible auto-increment column as a primary key for the table."  ,
SESSION_VAR(sql_generate_invisible_primary_key)  ,
CMD_LINE(OPT_ARG ,
DEFAULT(false)  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(check_session_admin ,
ON_UPDATE(nullptr  
)
static

◆ Sys_sql_mode

Sys_var_set Sys_sql_mode("sql_mode", "Syntax: sql-mode=mode[,mode[,mode...]]. See the manual for the " "complete list of valid sql modes", HINT_UPDATEABLE SESSION_VAR(sql_mode), CMD_LINE(REQUIRED_ARG), sql_mode_names, DEFAULT(MODE_NO_ENGINE_SUBSTITUTION|MODE_ONLY_FULL_GROUP_BY| MODE_STRICT_TRANS_TABLES|MODE_NO_ZERO_IN_DATE| MODE_NO_ZERO_DATE|MODE_ERROR_FOR_DIVISION_BY_ZERO), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_sql_mode), ON_UPDATE(fix_sql_mode)) ( "sql_mode"  )
static

◆ Sys_sql_notes

Sys_var_bit Sys_sql_notes("sql_notes", "sql_notes", SESSION_VAR(option_bits), NO_CMD_LINE, OPTION_SQL_NOTES, DEFAULT(true)) ( "sql_notes"  ,
"sql_notes"  ,
SESSION_VAR(option_bits)  ,
NO_CMD_LINE  ,
OPTION_SQL_NOTES  ,
DEFAULT(true)   
)
static

◆ Sys_sql_replica_skip_counter

Sys_var_uint Sys_sql_replica_skip_counter("sql_replica_skip_counter", "sql_replica_skip_counter", GLOBAL_VAR(sql_replica_skip_counter), NO_CMD_LINE, VALID_RANGE(0, UINT_MAX), DEFAULT(0), BLOCK_SIZE(1), &PLock_sql_replica_skip_counter, NOT_IN_BINLOG, ON_CHECK(check_slave_skip_counter)) ( "sql_replica_skip_counter"  ,
"sql_replica_skip_counter"  ,
GLOBAL_VAR(sql_replica_skip_counter ,
NO_CMD_LINE  ,
VALID_RANGE(0, UINT_MAX)  ,
DEFAULT(0)  ,
BLOCK_SIZE(1)  ,
PLock_sql_replica_skip_counter,
NOT_IN_BINLOG  ,
ON_CHECK(check_slave_skip_counter  
)
static

◆ Sys_sql_require_primary_key

Sys_var_bool Sys_sql_require_primary_key
static
Initial value:
{
"sql_require_primary_key",
"When set, tables must be created with a primary key, and an existing "
"primary key cannot be removed with 'ALTER TABLE'. Attempts to do so "
"will result in an error.",
HINT_UPDATEABLE SESSION_VAR(sql_require_primary_key),
DEFAULT(false),
@ OPT_ARG
Definition: my_getopt.h:81
static Sys_var_ulong CMD_LINE(REQUIRED_ARG, 0)
static bool check_session_admin(sys_var *self, THD *thd, set_var *setv)
Check if SESSION_VARIABLES_ADMIN granted.
Definition: sys_vars.cc:426
static Sys_var_ulong DEFAULT(25000)
#define SESSION_VAR(X)
Definition: sys_vars.h:123
#define HINT_UPDATEABLE
Definition: sys_vars.h:144
#define IN_BINLOG
Definition: sys_vars.h:135

◆ Sys_sql_slave_skip_counter

Sys_var_deprecated_alias Sys_sql_slave_skip_counter("sql_slave_skip_counter", Sys_sql_replica_skip_counter) ( "sql_slave_skip_counter"  ,
Sys_sql_replica_skip_counter   
)
static

◆ Sys_sql_warnings

Sys_var_bit Sys_sql_warnings("sql_warnings", "sql_warnings", SESSION_VAR(option_bits), NO_CMD_LINE, OPTION_WARNINGS, DEFAULT(false)) ( "sql_warnings"  ,
"sql_warnings"  ,
SESSION_VAR(option_bits)  ,
NO_CMD_LINE  ,
OPTION_WARNINGS  ,
DEFAULT(false)   
)
static

◆ Sys_ssl_fips_mode

Sys_var_enum Sys_ssl_fips_mode("ssl_fips_mode", "SSL FIPS mode (applies only for OpenSSL); " "permitted values are: OFF, ON, STRICT", READ_ONLY GLOBAL_VAR(opt_ssl_fips_mode), CMD_LINE(REQUIRED_ARG), ssl_fips_mode_names, DEFAULT(0), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(nullptr), DEPRECATED_VAR(""), sys_var::PARSE_EARLY) ( "ssl_fips_mode"  ,
"SSL FIPS mode (applies only for OpenSSL); " "permitted values are:  OFF,
ON  ,
STRICT"  ,
READ_ONLY   GLOBAL_VARopt_ssl_fips_mode,
CMD_LINE(REQUIRED_ARG ,
ssl_fips_mode_names  ,
DEFAULT(0)  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(nullptr ,
ON_UPDATE(nullptr ,
DEPRECATED_VAR("")  ,
sys_var::PARSE_EARLY   
)
static

◆ Sys_statement_id

Sys_var_session_special Sys_statement_id("statement_id", "statement_id: represents the id of the query " "When this option is enabled it returns the statement id to the client, " "the client can find more data about this query from the performance schema" "(such as: events_statements_history table, rpd_query_stats table etc) by " "searching for a specific statement_id value.", READ_ONLY sys_var::ONLY_SESSION, NO_CMD_LINE, VALID_RANGE(0, INT_MAX64), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(nullptr), ON_READ(read_statement_id)) ( "statement_id"  ,
"statement_id: represents the id of the query " "When this option is enabled it returns the statement id to the  client,
" "the client can find more data about this query from the performance schema" "(such as:events_statements_history table, rpd_query_stats table etc) by " "searching for a specific statement_id value."  ,
READ_ONLY sys_var::ONLY_SESSION  ,
NO_CMD_LINE  ,
VALID_RANGE(0, INT_MAX64 ,
BLOCK_SIZE(1)  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(nullptr ,
ON_UPDATE(nullptr ,
ON_READ(read_statement_id  
)
static

◆ Sys_stored_program_def_size

Sys_var_ulong Sys_stored_program_def_size("stored_program_definition_cache", "The number of cached stored program definitions", GLOBAL_VAR(stored_program_def_size), CMD_LINE(REQUIRED_ARG), VALID_RANGE(STORED_PROGRAM_DEF_CACHE_MIN, 512 *1024), DEFAULT(STORED_PROGRAM_DEF_CACHE_DEFAULT), BLOCK_SIZE(1)) ( "stored_program_definition_cache"  ,
"The number of cached stored program definitions"  ,
GLOBAL_VAR(stored_program_def_size ,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(STORED_PROGRAM_DEF_CACHE_MIN, 512 *1024)  ,
DEFAULT(STORED_PROGRAM_DEF_CACHE_DEFAULT ,
BLOCK_SIZE(1)   
)
static

◆ Sys_super_readonly

Sys_var_bool Sys_super_readonly("super_read_only", "Make all non-temporary tables read-only, with the exception for " "replication applier threads. Users with the SUPER privilege are " "affected, unlike read_only. Setting super_read_only to ON " "also sets read_only to ON.", GLOBAL_VAR(super_read_only), CMD_LINE(OPT_ARG), DEFAULT(false), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(fix_super_read_only)) ( "super_read_only"  ,
"Make all non-temporary tables read-  only,
with the exception for " "replication applier threads. Users with the SUPER privilege are " "  affected,
unlike read_only. Setting super_read_only to ON " "also sets read_only to ON."  ,
GLOBAL_VAR(super_read_only ,
CMD_LINE(OPT_ARG ,
DEFAULT(false)  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(nullptr ,
ON_UPDATE(fix_super_read_only  
)
static

Setting super_read_only to ON triggers read_only to also be set to ON.

◆ Sys_sync_binlog_period

Sys_var_uint Sys_sync_binlog_period("sync_binlog", "Synchronously flush binary log to disk after" " every #th write to the file. Use 0 to disable synchronous" " flushing", GLOBAL_VAR(sync_binlog_period), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, UINT_MAX), DEFAULT(1), BLOCK_SIZE(1)) ( "sync_binlog"  ,
"Synchronously flush binary log to disk after" " every #th write to the file. Use 0 to disable synchronous" " flushing"  ,
GLOBAL_VAR(sync_binlog_period ,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(0, UINT_MAX)  ,
DEFAULT(1)  ,
BLOCK_SIZE(1)   
)
static

◆ Sys_sync_master_info

Sys_var_deprecated_alias Sys_sync_master_info("sync_master_info", Sys_sync_source_info) ( "sync_master_info"  ,
Sys_sync_source_info   
)
static

◆ Sys_sync_relaylog_period

Sys_var_uint Sys_sync_relaylog_period("sync_relay_log", "Synchronously flush relay log to disk after " "every #th event. Use 0 to disable synchronous flushing", GLOBAL_VAR(sync_relaylog_period), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, UINT_MAX), DEFAULT(10000), BLOCK_SIZE(1)) ( "sync_relay_log"  ,
"Synchronously flush relay log to disk after " "every #th event. Use 0 to disable synchronous flushing"  ,
GLOBAL_VAR(sync_relaylog_period ,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(0, UINT_MAX)  ,
DEFAULT(10000)  ,
BLOCK_SIZE(1)   
)
static

◆ Sys_sync_relayloginfo_period

Sys_var_uint Sys_sync_relayloginfo_period("sync_relay_log_info", "Synchronously flush relay log info " "to disk after every #th transaction. Use 0 to disable " "synchronous flushing. This variable is deprecated and will be removed in " "a future version.", GLOBAL_VAR(sync_relayloginfo_period), CMD_LINE(REQUIRED_ARG, OPT_SYNC_RELAY_LOG_INFO), VALID_RANGE(0, UINT_MAX), DEFAULT(10000), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(nullptr), DEPRECATED_VAR("")) ( "sync_relay_log_info"  ,
"Synchronously flush relay log info " "to disk after every #th transaction. Use 0 to disable " "synchronous flushing. This variable is deprecated and will be removed in " "a future version."  ,
GLOBAL_VAR(sync_relayloginfo_period ,
CMD_LINE(REQUIRED_ARG, OPT_SYNC_RELAY_LOG_INFO ,
VALID_RANGE(0, UINT_MAX)  ,
DEFAULT(10000)  ,
BLOCK_SIZE(1)  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(nullptr ,
ON_UPDATE(nullptr ,
DEPRECATED_VAR("")   
)
static

◆ Sys_sync_source_info

Sys_var_uint Sys_sync_source_info("sync_source_info", "Synchronize replication receiver positions to disk periodically, after " "the specified number of events. Use 0 to disable periodic " "synchronization.", GLOBAL_VAR(sync_masterinfo_period), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, UINT_MAX), DEFAULT(10000), BLOCK_SIZE(1)) ( "sync_source_info"  ,
"Synchronize replication receiver positions to disk  periodically,
after " "the specified number of events. Use 0 to disable periodic " "synchronization."  ,
GLOBAL_VAR(sync_masterinfo_period ,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(0, UINT_MAX)  ,
DEFAULT(10000)  ,
BLOCK_SIZE(1)   
)
static

◆ Sys_sys_variables_admin_subject

Sys_var_charptr Sys_sys_variables_admin_subject(PERSIST_ONLY_ADMIN_X509_SUBJECT, "The client peer certificate name required to enable setting all " "system variables via SET PERSIST[_ONLY]", READ_ONLY NON_PERSIST GLOBAL_VAR(sys_var_persist_only_admin_x509_subject), CMD_LINE(OPT_ARG), IN_SYSTEM_CHARSET, DEFAULT("")) ( PERSIST_ONLY_ADMIN_X509_SUBJECT  ,
"The client peer certificate name required to enable setting all " "system variables via SET PERSIST"  [_ONLY],
READ_ONLY NON_PERSIST   GLOBAL_VARsys_var_persist_only_admin_x509_subject,
CMD_LINE(OPT_ARG ,
IN_SYSTEM_CHARSET  ,
DEFAULT("")   
)
static

◆ Sys_system_time_zone

Sys_var_system_time_zone Sys_system_time_zone("system_time_zone", "The server system time zone") ( "system_time_zone"  ,
"The server system time zone"   
)
static

◆ Sys_table_cache_instances

Sys_var_ulong Sys_table_cache_instances("table_open_cache_instances", "The number of table cache instances", READ_ONLY GLOBAL_VAR(table_cache_instances), CMD_LINE(REQUIRED_ARG), VALID_RANGE(1, Table_cache_manager::MAX_TABLE_CACHES), DEFAULT(Table_cache_manager::DEFAULT_MAX_TABLE_CACHES), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(nullptr), nullptr, sys_var::PARSE_EARLY) ( "table_open_cache_instances"  ,
"The number of table cache instances"  ,
READ_ONLY   GLOBAL_VARtable_cache_instances,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(1, Table_cache_manager::MAX_TABLE_CACHES ,
DEFAULT(Table_cache_manager::DEFAULT_MAX_TABLE_CACHES ,
BLOCK_SIZE(1)  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(nullptr ,
ON_UPDATE(nullptr ,
nullptr  ,
sys_var::PARSE_EARLY   
)
static

◆ Sys_table_cache_size

Sys_var_ulong Sys_table_cache_size("table_open_cache", "The number of cached open tables " "(total for all table cache instances)", GLOBAL_VAR(table_cache_size), CMD_LINE(REQUIRED_ARG), VALID_RANGE(1, 512 *1024), DEFAULT(TABLE_OPEN_CACHE_DEFAULT), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(fix_table_cache_size), nullptr, sys_var::PARSE_EARLY) ( "table_open_cache"  ,
"The number of cached open tables " "(total for all table cache instances)"  ,
GLOBAL_VAR(table_cache_size ,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(1, 512 *1024)  ,
DEFAULT(TABLE_OPEN_CACHE_DEFAULT ,
BLOCK_SIZE(1)  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(nullptr ,
ON_UPDATE(fix_table_cache_size ,
nullptr  ,
sys_var::PARSE_EARLY   
)
static

◆ Sys_table_def_size

Sys_var_ulong Sys_table_def_size("table_definition_cache", "The number of cached table definitions", GLOBAL_VAR(table_def_size), CMD_LINE(REQUIRED_ARG, OPT_TABLE_DEFINITION_CACHE), VALID_RANGE(TABLE_DEF_CACHE_MIN, 512 *1024), DEFAULT(TABLE_DEF_CACHE_DEFAULT), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(nullptr), nullptr, sys_var::PARSE_EARLY) ( "table_definition_cache"  ,
"The number of cached table definitions"  ,
GLOBAL_VAR(table_def_size ,
CMD_LINE(REQUIRED_ARG, OPT_TABLE_DEFINITION_CACHE ,
VALID_RANGE(TABLE_DEF_CACHE_MIN, 512 *1024)  ,
DEFAULT(TABLE_DEF_CACHE_DEFAULT ,
BLOCK_SIZE(1)  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(nullptr ,
ON_UPDATE(nullptr ,
nullptr  ,
sys_var::PARSE_EARLY   
)
static

◆ Sys_table_encryption_privilege_check

Sys_var_bool Sys_table_encryption_privilege_check("table_encryption_privilege_check", "Indicates if server enables privilege check when user tries to use " "non-default value for CREATE DATABASE or CREATE TABLESPACE or when " "user tries to do CREATE TABLE with ENCRYPTION option which deviates " "from per-database default.", GLOBAL_VAR(opt_table_encryption_privilege_check), CMD_LINE(OPT_ARG), DEFAULT(false), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_set_table_encryption_privilege_access), ON_UPDATE(nullptr)) ( "table_encryption_privilege_check"  ,
"Indicates if server enables privilege check when user tries to use " "non-default value for CREATE DATABASE or CREATE TABLESPACE or when " "user tries to do CREATE TABLE with ENCRYPTION option which deviates " "from per-database default."  ,
GLOBAL_VAR(opt_table_encryption_privilege_check ,
CMD_LINE(OPT_ARG ,
DEFAULT(false)  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(check_set_table_encryption_privilege_access ,
ON_UPDATE(nullptr  
)
static

◆ Sys_tablespace_def_size

Sys_var_ulong Sys_tablespace_def_size("tablespace_definition_cache", "The number of cached tablespace definitions", GLOBAL_VAR(tablespace_def_size), CMD_LINE(REQUIRED_ARG), VALID_RANGE(TABLESPACE_DEF_CACHE_MIN, 512 *1024), DEFAULT(TABLESPACE_DEF_CACHE_DEFAULT), BLOCK_SIZE(1)) ( "tablespace_definition_cache"  ,
"The number of cached tablespace definitions"  ,
GLOBAL_VAR(tablespace_def_size ,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(TABLESPACE_DEF_CACHE_MIN, 512 *1024)  ,
DEFAULT(TABLESPACE_DEF_CACHE_DEFAULT ,
BLOCK_SIZE(1)   
)
static

◆ Sys_temptable_max_mmap

Sys_var_ulonglong Sys_temptable_max_mmap("temptable_max_mmap", "Maximum amount of memory (in bytes) the TempTable storage engine is " "allowed to allocate from MMAP-backed files before starting to " "store data on disk.", GLOBAL_VAR(temptable_max_mmap), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, ULLONG_MAX), DEFAULT(0), BLOCK_SIZE(1)) ( "temptable_max_mmap"  ,
"Maximum amount of memory (in bytes) the TempTable storage engine is " "allowed to allocate from MMAP-backed files before starting to " "store data on disk."  ,
GLOBAL_VAR(temptable_max_mmap ,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(0, ULLONG_MAX)  ,
DEFAULT(0)  ,
BLOCK_SIZE(1)   
)
static

◆ Sys_temptable_max_ram

Sys_var_ulonglong Sys_temptable_max_ram("temptable_max_ram", "Maximum amount of memory (in bytes) the TempTable storage engine is " "allowed to allocate from the main memory (RAM) before starting to " "store data on disk.", GLOBAL_VAR(temptable_max_ram), CMD_LINE(REQUIRED_ARG), VALID_RANGE(2<< 20, ULLONG_MAX), DEFAULT(std::clamp(ulonglong{3 *(my_physical_memory()/100)}, 1ULL<< 30, 1ULL<< 32)), BLOCK_SIZE(1)) ( "temptable_max_ram"  ,
"Maximum amount of memory (in bytes) the TempTable storage engine is " "allowed to allocate from the main memory (RAM) before starting to " "store data on disk."  ,
GLOBAL_VAR(temptable_max_ram ,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(2<< 20, ULLONG_MAX)  ,
DEFAULT(std::clamp(ulonglong{3 *(my_physical_memory()/100)}, 1ULL<< 30, 1ULL<< 32))  ,
BLOCK_SIZE(1)   
)
static

◆ Sys_temptable_use_mmap

Sys_var_bool Sys_temptable_use_mmap("temptable_use_mmap", "Use mmap files for temptables. " "This variable is deprecated and will be removed in a future release.", GLOBAL_VAR(temptable_use_mmap), CMD_LINE(OPT_ARG), DEFAULT(false), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(update_deprecated_with_removal_message), nullptr, sys_var::PARSE_NORMAL) ( "temptable_use_mmap"  ,
"Use mmap files for temptables. " "This variable is deprecated and will be removed in a future release."  ,
GLOBAL_VAR(temptable_use_mmap ,
CMD_LINE(OPT_ARG ,
DEFAULT(false)  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(nullptr ,
ON_UPDATE(update_deprecated_with_removal_message ,
nullptr  ,
sys_var::PARSE_NORMAL   
)
static

◆ Sys_terminology_use_previous

Sys_var_enum Sys_terminology_use_previous("terminology_use_previous", "Make monitoring tables and statements use the identifiers that were " "in use before they were changed in a given release. That includes names " "for mutexes, read/write locks, condition variables, memory allocations, " "thread names, thread stages, and thread commands. When the session " "option is set to BEFORE_8_0_26, the session uses the names that were in " "use until 8.0.25, when it selects from performance_schema tables, or " "selects from INFORMATION_SCHEMA.PROCESSLIST, or issues SHOW PROCESSLIST " "or SHOW REPLICA STATUS. When the global option is set to BEFORE_8_0_26, " "new sessions use BEFORE_8_0_26 as default for the session option, and in " "addition the thread commands that were in use until 8.0.25 are written " "to the slow query log. If set to BEFORE_8_2_0 or less the command SHOW " "CREATE EVENT will show how the event would have been created in a server " "of a version lower than 8.2.0. SHOW EVENTS and queries into " "information_schema.events will also output the old terminology for the " "event status field.", SESSION_VAR(terminology_use_previous), CMD_LINE(REQUIRED_ARG), terminology_use_previous_names, DEFAULT(terminology_use_previous::NONE), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(nullptr), DEPRECATED_VAR("")) ( "terminology_use_previous"  ,
"Make monitoring tables and statements use the identifiers that were " "in use before they were changed in a given release. That includes names " "for  mutexes,
read/write  locks,
condition  variables,
memory  allocations,
" "thread  names,
thread  stages,
and thread commands. When the session " "option is set to  BEFORE_8_0_26,
the session uses the names that were in " "use until 8.0.  25,
when it selects from performance_schema  tables,
or " "selects from INFORMATION_SCHEMA.  PROCESSLIST,
or issues SHOW PROCESSLIST " "or SHOW REPLICA STATUS. When the global option is set to  BEFORE_8_0_26,
" "new sessions use BEFORE_8_0_26 as default for the session  option,
and in " "addition the thread commands that were in use until 8.0.25 are written " "to the slow query log. If set to BEFORE_8_2_0 or less the command SHOW " "CREATE EVENT will show how the event would have been created in a server " "of a version lower than 8.2.0. SHOW EVENTS and queries into " "information_schema.events will also output the old terminology for the " "event status field."  ,
SESSION_VAR(terminology_use_previous)  ,
CMD_LINE(REQUIRED_ARG ,
terminology_use_previous_names  ,
DEFAULT(terminology_use_previous::NONE ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(nullptr ,
ON_UPDATE(nullptr ,
DEPRECATED_VAR("")   
)
static

◆ Sys_thread_cache_size

Sys_var_ulong Sys_thread_cache_size("thread_cache_size", "How many threads we should keep in a cache for reuse", GLOBAL_VAR(Per_thread_connection_handler::max_blocked_pthreads), CMD_LINE(REQUIRED_ARG, OPT_THREAD_CACHE_SIZE), VALID_RANGE(0, 16384), DEFAULT(0), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, nullptr, ON_UPDATE(modify_thread_cache_size)) ( "thread_cache_size"  ,
"How many threads we should keep in a cache for reuse"  ,
GLOBAL_VAR(Per_thread_connection_handler::max_blocked_pthreads ,
CMD_LINE(REQUIRED_ARG, OPT_THREAD_CACHE_SIZE ,
VALID_RANGE(0, 16384)  ,
DEFAULT(0)  ,
BLOCK_SIZE(1)  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
nullptr  ,
ON_UPDATE(modify_thread_cache_size  
)
static

◆ Sys_thread_handling

Sys_var_enum Sys_thread_handling("thread_handling", "Define threads usage for handling queries, one of " "one-thread-per-connection, no-threads, loaded-dynamically", READ_ONLY GLOBAL_VAR(Connection_handler_manager::thread_handling), CMD_LINE(REQUIRED_ARG), thread_handling_names, DEFAULT(0)) ( "thread_handling"  ,
"Define threads usage for handling  queries,
one of " "one-thread-per-  connection,
no-  threads,
loaded-dynamically"  ,
READ_ONLY   GLOBAL_VARConnection_handler_manager::thread_handling,
CMD_LINE(REQUIRED_ARG ,
thread_handling_names  ,
DEFAULT(0)   
)
static

◆ Sys_thread_stack

Sys_var_ulong Sys_thread_stack("thread_stack", "The stack size for each thread", READ_ONLY GLOBAL_VAR(my_thread_stack_size), CMD_LINE(REQUIRED_ARG), VALID_RANGE(128 *1024, ULONG_MAX), DEFAULT(DEFAULT_THREAD_STACK), BLOCK_SIZE(1024)) ( "thread_stack"  ,
"The stack size for each thread"  ,
READ_ONLY   GLOBAL_VARmy_thread_stack_size,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(128 *1024, ULONG_MAX)  ,
DEFAULT(DEFAULT_THREAD_STACK ,
BLOCK_SIZE(1024)   
)
static

◆ Sys_time_zone

Sys_var_tz Sys_time_zone("time_zone", "time_zone", HINT_UPDATEABLE SESSION_VAR(time_zone), NO_CMD_LINE, DEFAULT(&default_tz), NO_MUTEX_GUARD, IN_BINLOG) ( "time_zone"  ,
"time_zone"  ,
HINT_UPDATEABLE   SESSION_VARtime_zone,
NO_CMD_LINE  ,
DEFAULT &  default_tz,
NO_MUTEX_GUARD  ,
IN_BINLOG   
)
static

◆ Sys_timestamp

Sys_var_session_special_double Sys_timestamp("timestamp", "Set the time for this client", HINT_UPDATEABLE sys_var::ONLY_SESSION, NO_CMD_LINE, VALID_RANGE(0, 0), BLOCK_SIZE(1), NO_MUTEX_GUARD, IN_BINLOG, ON_CHECK(check_timestamp), ON_UPDATE(update_timestamp), ON_READ(read_timestamp)) ( "timestamp"  ,
"Set the time for this client"  ,
HINT_UPDATEABLE sys_var::ONLY_SESSION  ,
NO_CMD_LINE  ,
VALID_RANGE(0, 0)  ,
BLOCK_SIZE(1)  ,
NO_MUTEX_GUARD  ,
IN_BINLOG  ,
ON_CHECK(check_timestamp ,
ON_UPDATE(update_timestamp ,
ON_READ(read_timestamp  
)
static

◆ Sys_tls_certificates_enforced_validation

Sys_var_bool Sys_tls_certificates_enforced_validation("tls_certificates_enforced_validation", "If set to TRUE, server stops execution at the start up in case of invalid " "certificates " "When ALTER INSTANCE RELOAD TLS executed, new certficates will not be used " "if validation fails. ", READ_ONLY NON_PERSIST GLOBAL_VAR(opt_tls_certificates_enforced_validation), CMD_LINE(OPT_ARG), DEFAULT(false), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(nullptr)) ( "tls_certificates_enforced_validation"  ,
"If set to  TRUE,
server stops execution at the start up in case of invalid " "certificates " "When ALTER INSTANCE RELOAD TLS  executed,
new certficates will not be used " "if validation fails. "  ,
READ_ONLY NON_PERSIST   GLOBAL_VARopt_tls_certificates_enforced_validation,
CMD_LINE(OPT_ARG ,
DEFAULT(false)  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(nullptr ,
ON_UPDATE(nullptr  
)
static

◆ Sys_tmp_table_size

Sys_var_ulonglong Sys_tmp_table_size("tmp_table_size", "If an internal in-memory temporary table in the MEMORY or TempTable " "storage engine exceeds this size, MySQL will automatically convert it " "to an on-disk table ", HINT_UPDATEABLE SESSION_VAR(tmp_table_size), CMD_LINE(REQUIRED_ARG), VALID_RANGE(1024, std::numeric_limits< ulonglong >::max()), DEFAULT(16 *1024 *1024), BLOCK_SIZE(1)) ( "tmp_table_size"  ,
"If an internal in-memory temporary table in the MEMORY or TempTable " "storage engine exceeds this  size,
MySQL will automatically convert it " "to an on-disk table "  ,
HINT_UPDATEABLE   SESSION_VARtmp_table_size,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(1024, std::numeric_limits< ulonglong >::max())  ,
DEFAULT(16 *1024 *1024)  ,
BLOCK_SIZE(1)   
)
static

◆ Sys_tmpdir

Sys_var_charptr Sys_tmpdir("tmpdir", "Path for temporary files. Several paths may " "be specified, separated by a " "colon (:)" ", in this case they are used in a round-robin fashion", READ_ONLY NON_PERSIST GLOBAL_VAR(opt_mysql_tmpdir), CMD_LINE(REQUIRED_ARG, 't'), IN_FS_CHARSET, DEFAULT(nullptr)) ( "tmpdir"  ,
"Path for temporary files. Several paths may " "be  specified,
separated by a " "colon(:)" "  ,
in this case they are used in a round-robin fashion"  ,
READ_ONLY NON_PERSIST   GLOBAL_VARopt_mysql_tmpdir,
CMD_LINE(REQUIRED_ARG, 't')  ,
IN_FS_CHARSET  ,
DEFAULT(nullptr  
)
static

◆ Sys_track_session_sys_vars

Sys_var_charptr Sys_track_session_sys_vars("session_track_system_variables", "Track changes in registered system variables.", SESSION_VAR(track_sysvars_ptr), CMD_LINE(REQUIRED_ARG), IN_FS_CHARSET, DEFAULT("time_zone,autocommit,character_set_client,character_set_results," "character_set_connection"), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_track_session_sys_vars), ON_UPDATE(update_track_session_sys_vars)) ( "session_track_system_variables"  ,
"Track changes in registered system variables."  ,
SESSION_VAR(track_sysvars_ptr)  ,
CMD_LINE(REQUIRED_ARG ,
IN_FS_CHARSET  ,
DEFAULT("time_zone,autocommit,character_set_client,character_set_results," "character_set_connection")  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(check_track_session_sys_vars ,
ON_UPDATE(update_track_session_sys_vars  
)
static

◆ Sys_track_session_sys_vars_ptr

export sys_var* Sys_track_session_sys_vars_ptr = &Sys_track_session_sys_vars

◆ Sys_trans_alloc_block_size

Sys_var_ulong Sys_trans_alloc_block_size("transaction_alloc_block_size", "Allocation block size for transactions to be stored in binary log", SESSION_VAR(trans_alloc_block_size), CMD_LINE(REQUIRED_ARG), VALID_RANGE(1024, 128 *1024), DEFAULT(QUERY_ALLOC_BLOCK_SIZE), BLOCK_SIZE(1024), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(fix_trans_mem_root)) ( "transaction_alloc_block_size"  ,
"Allocation block size for transactions to be stored in binary log"  ,
SESSION_VAR(trans_alloc_block_size)  ,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(1024, 128 *1024)  ,
DEFAULT(QUERY_ALLOC_BLOCK_SIZE ,
BLOCK_SIZE(1024)  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(nullptr ,
ON_UPDATE(fix_trans_mem_root  
)
static

◆ Sys_trans_prealloc_size

Sys_var_ulong Sys_trans_prealloc_size("transaction_prealloc_size", "Persistent buffer for transactions to be stored in binary log", SESSION_VAR(trans_prealloc_size), CMD_LINE(REQUIRED_ARG), VALID_RANGE(1024, 128 *1024), DEFAULT(TRANS_ALLOC_PREALLOC_SIZE), BLOCK_SIZE(1024), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(nullptr), DEPRECATED_VAR("")) ( "transaction_prealloc_size"  ,
"Persistent buffer for transactions to be stored in binary log"  ,
SESSION_VAR(trans_prealloc_size)  ,
CMD_LINE(REQUIRED_ARG ,
VALID_RANGE(1024, 128 *1024)  ,
DEFAULT(TRANS_ALLOC_PREALLOC_SIZE ,
BLOCK_SIZE(1024)  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(nullptr ,
ON_UPDATE(nullptr ,
DEPRECATED_VAR("")   
)
static

◆ Sys_transaction_allow_batching

Sys_var_bit Sys_transaction_allow_batching("transaction_allow_batching", "transaction_allow_batching", SESSION_ONLY(option_bits), NO_CMD_LINE, OPTION_ALLOW_BATCH, DEFAULT(false)) ( "transaction_allow_batching"  ,
"transaction_allow_batching"  ,
SESSION_ONLY(option_bits)  ,
NO_CMD_LINE  ,
OPTION_ALLOW_BATCH  ,
DEFAULT(false)   
)
static

◆ Sys_transaction_isolation

Sys_var_transaction_isolation Sys_transaction_isolation("transaction_isolation", "Default transaction isolation level", UNTRACKED_DEFAULT SESSION_VAR(transaction_isolation), NO_CMD_LINE, tx_isolation_names, DEFAULT(ISO_REPEATABLE_READ), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_transaction_isolation)) ( "transaction_isolation"  ,
"Default transaction isolation level"  ,
UNTRACKED_DEFAULT   SESSION_VARtransaction_isolation,
NO_CMD_LINE  ,
tx_isolation_names  ,
DEFAULT(ISO_REPEATABLE_READ ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(check_transaction_isolation  
)
static

◆ Sys_transaction_read_only

Sys_var_transaction_read_only Sys_transaction_read_only("transaction_read_only", "Set default transaction access mode to read only.", UNTRACKED_DEFAULT SESSION_VAR(transaction_read_only), NO_CMD_LINE, DEFAULT(0), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_transaction_read_only)) ( "transaction_read_only"  ,
"Set default transaction access mode to read only."  ,
UNTRACKED_DEFAULT   SESSION_VARtransaction_read_only,
NO_CMD_LINE  ,
DEFAULT(0)  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(check_transaction_read_only  
)
static

◆ Sys_trust_function_creators

Sys_var_bool Sys_trust_function_creators("log_bin_trust_function_creators", "If set to FALSE (the default), then when --log-bin is used, creation " "of a stored function (or trigger) is allowed only to users having the " "SUPER privilege and only if this stored function (trigger) may not " "break binary logging. Note that if ALL connections to this server " "ALWAYS use row-based binary logging, the security issues do not " "exist and the binary logging cannot break, so you can safely set " "this to TRUE. This variable is deprecated and will be removed in a " "future version.", GLOBAL_VAR(trust_function_creators), CMD_LINE(OPT_ARG), DEFAULT(false), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(nullptr), DEPRECATED_VAR("")) ( "log_bin_trust_function_creators"  ,
"If set to FALSE   the default,
then when --log-bin is  used,
creation " "of a stored function(or trigger) is allowed only to users having the " "SUPER privilege and only if this stored function(trigger) may not " "break binary logging. Note that if ALL connections to this server " "ALWAYS use row-based binary  logging,
the security issues do not " "exist and the binary logging cannot  break,
so you can safely set " "this to TRUE. This variable is deprecated and will be removed in a " "future version."  ,
GLOBAL_VAR(trust_function_creators ,
CMD_LINE(OPT_ARG ,
DEFAULT(false)  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(nullptr ,
ON_UPDATE(nullptr ,
DEPRECATED_VAR("")   
)
static

◆ Sys_unique_checks

Sys_var_bit Sys_unique_checks("unique_checks", "unique_checks", HINT_UPDATEABLE SESSION_VAR(option_bits), NO_CMD_LINE, REVERSE(OPTION_RELAXED_UNIQUE_CHECKS), DEFAULT(true), NO_MUTEX_GUARD, IN_BINLOG) ( "unique_checks"  ,
"unique_checks"  ,
HINT_UPDATEABLE   SESSION_VARoption_bits,
NO_CMD_LINE  ,
REVERSE(OPTION_RELAXED_UNIQUE_CHECKS ,
DEFAULT(true)  ,
NO_MUTEX_GUARD  ,
IN_BINLOG   
)
static

◆ Sys_updatable_views_with_limit

Sys_var_enum Sys_updatable_views_with_limit("updatable_views_with_limit", "YES = Don't issue an error message (warning only) if a VIEW without " "presence of a key of the underlying table is used in queries with a " "LIMIT clause for updating. NO = Prohibit update of a VIEW, which " "does not contain a key of the underlying table and the query uses " "a LIMIT clause (usually get from GUI tools)", HINT_UPDATEABLE SESSION_VAR(updatable_views_with_limit), CMD_LINE(REQUIRED_ARG), updatable_views_with_limit_names, DEFAULT(true)) ( "updatable_views_with_limit"  ,
YES = Don't issue an error message (warning only) if a VIEW without " "presence of a key of the underlying table is used in queries with a " "LIMIT clause for updating. NO = Prohibit update of a VIEW,
which " "does not contain a key of the underlying table and the query uses " "a LIMIT clause(usually get from GUI tools)"  ,
HINT_UPDATEABLE   SESSION_VARupdatable_views_with_limit,
CMD_LINE(REQUIRED_ARG ,
updatable_views_with_limit_names  ,
DEFAULT(true)   
)
static

◆ Sys_use_secondary_engine

Sys_var_enum Sys_use_secondary_engine("use_secondary_engine", "Controls preparation of SELECT statements against secondary storage " "engine. Valid values: OFF/ON/FORCED. OFF = Prepare only against primary " "storage engine. ON = First prepare against secondary storage engine, " "reprepare against primary storage engine if error. FORCED = Prepare all " "SELECT statements referencing one or more base tables only against " "secondary storage engine.", HINT_UPDATEABLE SESSION_ONLY(use_secondary_engine), NO_CMD_LINE, use_secondary_engine_values, DEFAULT(SECONDARY_ENGINE_ON), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(nullptr)) ( "use_secondary_engine"  ,
"Controls preparation of SELECT statements against secondary storage " "engine. Valid values: OFF/ON/FORCED.  OFF = Prepare only against primary " "storage engine. ON = First prepare against secondary storage engine 
)
static

◆ Sys_use_separate_thread_for_admin

Sys_var_bool Sys_use_separate_thread_for_admin("create_admin_listener_thread", "Use a dedicated thread for listening incoming connections on admin" " interface", READ_ONLY NON_PERSIST GLOBAL_VAR(listen_admin_interface_in_separate_thread), CMD_LINE(OPT_ARG), DEFAULT(false)) ( "create_admin_listener_thread"  ,
"Use a dedicated thread for listening incoming connections on admin" " interface"  ,
READ_ONLY NON_PERSIST   GLOBAL_VARlisten_admin_interface_in_separate_thread,
CMD_LINE(OPT_ARG ,
DEFAULT(false)   
)
static

◆ Sys_validate_user_plugins

Sys_var_bool Sys_validate_user_plugins("validate_user_plugins", "Turns on additional validation of authentication plugins assigned " "to user accounts. ", READ_ONLY NOT_VISIBLE GLOBAL_VAR(validate_user_plugins), CMD_LINE(OPT_ARG), DEFAULT(true), NO_MUTEX_GUARD, NOT_IN_BINLOG) ( "validate_user_plugins"  ,
"Turns on additional validation of authentication plugins assigned " "to user accounts. "  ,
READ_ONLY NOT_VISIBLE   GLOBAL_VARvalidate_user_plugins,
CMD_LINE(OPT_ARG ,
DEFAULT(true)  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG   
)
static

◆ Sys_var_end_markers_in_json

Sys_var_bool Sys_var_end_markers_in_json("end_markers_in_json", "In JSON output (\"EXPLAIN FORMAT=JSON\" and optimizer trace), " "if variable is set to 1, repeats the structure's key (if it has one) " "near the closing bracket", HINT_UPDATEABLE SESSION_VAR(end_markers_in_json), CMD_LINE(OPT_ARG), DEFAULT(false)) ( "end_markers_in_json"  ,
"In JSON output   \"EXPLAIN FORMAT=JSON\" and optimizer trace,
" "if variable is set to  1,
repeats the structure 's key(if it has one) " "near the closing bracket"  ,
HINT_UPDATEABLE   SESSION_VARend_markers_in_json,
CMD_LINE(OPT_ARG ,
DEFAULT(false)   
)
static

◆ Sys_var_have_func

◆ Sys_var_original_commit_timestamp

Sys_var_ulonglong Sys_var_original_commit_timestamp("original_commit_timestamp", "The time when the current transaction was committed on the originating " "source, measured in microseconds since 1970 (the \"epoch\").", SESSION_ONLY(original_commit_timestamp), NO_CMD_LINE, VALID_RANGE(0, MAX_COMMIT_TIMESTAMP_VALUE), DEFAULT(MAX_COMMIT_TIMESTAMP_VALUE), BLOCK_SIZE(1), NO_MUTEX_GUARD, IN_BINLOG, ON_CHECK(check_session_admin_or_replication_applier)) ( "original_commit_timestamp"  ,
"The time when the current transaction was committed on the originating " "  source,
measured in microseconds since 1970(the \"epoch\")."  ,
SESSION_ONLY(original_commit_timestamp)  ,
NO_CMD_LINE  ,
VALID_RANGE(0, MAX_COMMIT_TIMESTAMP_VALUE ,
DEFAULT(MAX_COMMIT_TIMESTAMP_VALUE ,
BLOCK_SIZE(1)  ,
NO_MUTEX_GUARD  ,
IN_BINLOG  ,
ON_CHECK(check_session_admin_or_replication_applier  
)
static

◆ Sys_var_print_identified_with_as_hex

Sys_var_bool Sys_var_print_identified_with_as_hex("print_identified_with_as_hex", "SHOW CREATE USER will print the AS clause as HEX if it contains " "non-prinable characters", SESSION_VAR(print_identified_with_as_hex), CMD_LINE(OPT_ARG), DEFAULT(false)) ( "print_identified_with_as_hex"  ,
"SHOW CREATE USER will print the AS clause as HEX if it contains " "non-prinable characters"  ,
SESSION_VAR(print_identified_with_as_hex)  ,
CMD_LINE(OPT_ARG ,
DEFAULT(false)   
)
static

◆ Sys_var_require_row_format

Sys_var_bool Sys_var_require_row_format("require_row_format", "Limit the application of queries to row based events " "and DDLs with the exception of temporary table creation/deletion.", SESSION_ONLY(require_row_format), NO_CMD_LINE, DEFAULT(false), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_set_require_row_format)) ( "require_row_format"  ,
"Limit the application of queries to row based events " "and DDLs with the exception of temporary table creation/deletion."  ,
SESSION_ONLY(require_row_format)  ,
NO_CMD_LINE  ,
DEFAULT(false)  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(check_set_require_row_format  
)
static

Session only flag to limit the application of queries to row based events and DDLs with the exception of temporary table creation/deletion.

◆ Sys_var_show_create_table_skip_secondary_engine

Sys_var_bool Sys_var_show_create_table_skip_secondary_engine("show_create_table_skip_secondary_engine", "SHOW CREATE TABLE will skip SECONDARY_ENGINE when printing the table " "definition", SESSION_ONLY(show_create_table_skip_secondary_engine), NO_CMD_LINE, DEFAULT(false)) ( "show_create_table_skip_secondary_engine"  ,
"SHOW CREATE TABLE will skip SECONDARY_ENGINE when printing the table " "definition"  ,
SESSION_ONLY(show_create_table_skip_secondary_engine)  ,
NO_CMD_LINE  ,
DEFAULT(false)   
)
static

Session only flag to skip printing secondary engine in SHOW CREATE TABLE.

See also
store_create_info

◆ Sys_version

Sys_var_version Sys_version("version", "Server version", READ_ONLY NON_PERSIST GLOBAL_VAR(server_version_ptr), NO_CMD_LINE, IN_SYSTEM_CHARSET, DEFAULT(server_version)) ( "version"  ,
"Server version ,
READ_ONLY NON_PERSIST   GLOBAL_VARserver_version_ptr,
NO_CMD_LINE  ,
IN_SYSTEM_CHARSET  ,
DEFAULT(server_version  
)
static

◆ Sys_version_comment

Sys_var_charptr Sys_version_comment("version_comment", "version_comment", READ_ONLY NON_PERSIST GLOBAL_VAR(server_version_comment_ptr), NO_CMD_LINE, IN_SYSTEM_CHARSET, DEFAULT(MYSQL_COMPILATION_COMMENT_SERVER)) ( "version_comment"  ,
"version_comment"  ,
READ_ONLY NON_PERSIST   GLOBAL_VARserver_version_comment_ptr,
NO_CMD_LINE  ,
IN_SYSTEM_CHARSET  ,
DEFAULT(MYSQL_COMPILATION_COMMENT_SERVER  
)
static

◆ Sys_version_compile_machine

Sys_var_charptr Sys_version_compile_machine("version_compile_machine", "version_compile_machine", READ_ONLY NON_PERSIST GLOBAL_VAR(server_version_compile_machine_ptr), NO_CMD_LINE, IN_SYSTEM_CHARSET, DEFAULT(MACHINE_TYPE)) ( "version_compile_machine"  ,
"version_compile_machine"  ,
READ_ONLY NON_PERSIST   GLOBAL_VARserver_version_compile_machine_ptr,
NO_CMD_LINE  ,
IN_SYSTEM_CHARSET  ,
DEFAULT(MACHINE_TYPE  
)
static

◆ Sys_version_compile_os

Sys_var_charptr Sys_version_compile_os("version_compile_os", "version_compile_os", READ_ONLY NON_PERSIST GLOBAL_VAR(server_version_compile_os_ptr), NO_CMD_LINE, IN_SYSTEM_CHARSET, DEFAULT(SYSTEM_TYPE)) ( "version_compile_os"  ,
"version_compile_os"  ,
READ_ONLY NON_PERSIST   GLOBAL_VARserver_version_compile_os_ptr,
NO_CMD_LINE  ,
IN_SYSTEM_CHARSET  ,
DEFAULT(SYSTEM_TYPE  
)
static

◆ Sys_version_compile_zlib

Sys_var_charptr Sys_version_compile_zlib("version_compile_zlib", "version_compile_zlib", READ_ONLY NON_PERSIST GLOBAL_VAR(server_version_compile_zlib_ptr), NO_CMD_LINE, IN_SYSTEM_CHARSET, DEFAULT(ZLIB_VERSION)) ( "version_compile_zlib"  ,
"version_compile_zlib"  ,
READ_ONLY NON_PERSIST   GLOBAL_VARserver_version_compile_zlib_ptr,
NO_CMD_LINE  ,
IN_SYSTEM_CHARSET  ,
DEFAULT(ZLIB_VERSION)   
)
static

◆ Sys_warning_count

Sys_var_session_special Sys_warning_count("warning_count", "The number of errors, warnings, and notes " "that resulted from the last statement that generated messages", READ_ONLY sys_var::ONLY_SESSION, NO_CMD_LINE, VALID_RANGE(0, ULLONG_MAX), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(nullptr), ON_UPDATE(nullptr), ON_READ(read_warning_count)) ( "warning_count"  ,
"The number of  errors,
warnings  ,
and notes " "that resulted from the last statement that generated messages"  ,
READ_ONLY sys_var::ONLY_SESSION  ,
NO_CMD_LINE  ,
VALID_RANGE(0, ULLONG_MAX)  ,
BLOCK_SIZE(1)  ,
NO_MUTEX_GUARD  ,
NOT_IN_BINLOG  ,
ON_CHECK(nullptr ,
ON_UPDATE(nullptr ,
ON_READ(read_warning_count  
)
static

◆ Sys_windowing_use_high_precision

Sys_var_bool Sys_windowing_use_high_precision("windowing_use_high_precision", "For SQL window functions, determines whether to enable inversion " "optimization for moving window frames also for floating values.", HINT_UPDATEABLE SESSION_VAR(windowing_use_high_precision), CMD_LINE(OPT_ARG), DEFAULT(true)) ( "windowing_use_high_precision"  ,
"For SQL window  functions,
determines whether to enable inversion " "optimization for moving window frames also for floating values."  ,
HINT_UPDATEABLE   SESSION_VARwindowing_use_high_precision,
CMD_LINE(OPT_ARG ,
DEFAULT(true)   
)
static

◆ Sys_xa_detatch_on_prepare

Sys_var_bool Sys_xa_detatch_on_prepare("xa_detach_on_prepare", "When set, XA transactions will be detached (AKA dissociated or " "disconnected) from connection as part of XA PREPARE. This means that " "the XA transaction can be committed/rolled back by any connection, " "even if the starting connection has not terminated, and the starting " "connection can start new transactions. As a side effect, temporary " "tables cannot be used inside XA transactions. " "When disabled, XA transactions are associated with the same connection " "until the session disconnects. ON is the only safe choice for " "replication.", HINT_UPDATEABLE SESSION_VAR(xa_detach_on_prepare), CMD_LINE(OPT_ARG), DEFAULT(true), NO_MUTEX_GUARD, IN_BINLOG, ON_CHECK(check_session_admin_outside_trx_outside_sf)) ( "xa_detach_on_prepare"  ,
"When  set,
XA transactions will be detached(AKA dissociated or " "disconnected) from connection as part of XA PREPARE. This means that " "the XA transaction can be committed/rolled back by any  connection,
" "even if the starting connection has not  terminated,
and the starting " "connection can start new transactions. As a side  effect,
temporary " "tables cannot be used inside XA transactions. " "When  disabled,
XA transactions are associated with the same connection " "until the session disconnects. ON is the only safe choice for " "replication."  ,
HINT_UPDATEABLE   SESSION_VARxa_detach_on_prepare,
CMD_LINE(OPT_ARG ,
DEFAULT(true)  ,
NO_MUTEX_GUARD  ,
IN_BINLOG  ,
ON_CHECK(check_session_admin_outside_trx_outside_sf  
)
static

◆ TABLE_DEF_CACHE_MIN

constexpr const unsigned long TABLE_DEF_CACHE_MIN {400}
staticconstexpr

We must have room for at least 400 table definitions in the table cache, since otherwise there is no chance prepared statements that use these many tables can work.

Prepared statements use table definition cache ids (table_map_id) as table version identifiers. If the table definition cache size is less than the number of tables used in a statement, the contents of the table definition cache is guaranteed to rotate between a prepare and execute. This leads to stable validation errors. In future we shall use more stable version identifiers, for now the only solution is to ensure that the table definition cache can contain at least all tables of a given statement.

◆ TABLESPACE_DEF_CACHE_DEFAULT

constexpr const unsigned long TABLESPACE_DEF_CACHE_DEFAULT {256}
staticconstexpr

◆ TABLESPACE_DEF_CACHE_MIN

constexpr const unsigned long TABLESPACE_DEF_CACHE_MIN {256}
staticconstexpr

◆ terminology_use_previous_names

const char* terminology_use_previous_names[]
static
Initial value:
= {"NONE", "BEFORE_8_0_26",
"BEFORE_8_2_0", nullptr}

◆ thread_handling_names

const char* thread_handling_names[]
static
Initial value:
= {
"one-thread-per-connection", "no-threads", "loaded-dynamically", nullptr}

◆ TRANS_ALLOC_PREALLOC_SIZE

constexpr const unsigned long TRANS_ALLOC_PREALLOC_SIZE {4096}
staticconstexpr

◆ updatable_views_with_limit_names

const char* updatable_views_with_limit_names[] = {"NO", "YES", nullptr}
static

◆ use_secondary_engine_values

const char* use_secondary_engine_values[]
static
Initial value:
= {"OFF", "ON", "FORCED",
nullptr}

◆ VALID_RANGE

Sys_var_ulong VALID_RANGE(1, 1000000) ( ,
1000000   
)