sql_show.cc File Reference

#include "sql/sql_show.h"
#include <math.h>
#include <stdio.h>
#include <string.h>
#include <sys/types.h>
#include <time.h>
#include <algorithm>
#include <atomic>
#include <functional>
#include <memory>
#include <new>
#include <optional>
#include <string>
#include <vector>
#include "decimal.h"
#include "dig_vec.h"
#include "field_types.h"
#include "keycache.h"
#include "m_string.h"
#include "mutex_lock.h"
#include "my_alloc.h"
#include "my_base.h"
#include "my_bitmap.h"
#include "my_command.h"
#include "my_compiler.h"
#include "my_dbug.h"
#include "my_hostname.h"
#include "my_io.h"
#include "my_macros.h"
#include "my_sqlcommand.h"
#include "my_sys.h"
#include "my_systime.h"
#include "my_thread_local.h"
#include "mysql/components/services/log_builtins.h"
#include "mysql/components/services/log_shared.h"
#include "mysql/my_loglevel.h"
#include "mysql/mysql_lex_string.h"
#include "mysql/plugin.h"
#include "mysql/psi/mysql_mutex.h"
#include "mysql/service_mysql_alloc.h"
#include "mysql/strings/dtoa.h"
#include "mysql/strings/int2str.h"
#include "mysql/strings/m_ctype.h"
#include "mysql/udf_registration_types.h"
#include "mysql_com.h"
#include "mysql_time.h"
#include "mysqld_error.h"
#include "nulls.h"
#include "scope_guard.h"
#include "sql/auth/auth_acls.h"
#include "sql/auth/auth_common.h"
#include "sql/auth/sql_security_ctx.h"
#include "sql/dd/cache/dictionary_client.h"
#include "sql/dd/dd_schema.h"
#include "sql/dd/dd_table.h"
#include "sql/dd/properties.h"
#include "sql/dd/string_type.h"
#include "sql/dd/types/column.h"
#include "sql/dd/types/foreign_key.h"
#include "sql/dd/types/foreign_key_element.h"
#include "sql/dd/types/partition.h"
#include "sql/dd/types/partition_index.h"
#include "sql/dd/types/schema.h"
#include "sql/dd/types/table.h"
#include "sql/debug_sync.h"
#include "sql/derror.h"
#include "sql/enum_query_type.h"
#include "sql/error_handler.h"
#include "sql/events.h"
#include "sql/field.h"
#include "sql/handler.h"
#include "sql/item.h"
#include "sql/key.h"
#include "sql/log.h"
#include "sql/mdl.h"
#include "sql/mem_root_array.h"
#include "sql/mysqld.h"
#include "sql/mysqld_thd_manager.h"
#include "sql/opt_trace.h"
#include "sql/partition_info.h"
#include "sql/protocol.h"
#include "sql/psi_memory_key.h"
#include "sql/query_options.h"
#include "sql/query_result.h"
#include "sql/rpl_source.h"
#include "sql/set_var.h"
#include "sql/sp.h"
#include "sql/sp_head.h"
#include "sql/sp_rcontext.h"
#include "sql/sql_base.h"
#include "sql/sql_bitmap.h"
#include "sql/sql_check_constraint.h"
#include "sql/sql_class.h"
#include "sql/sql_const.h"
#include "sql/sql_db.h"
#include "sql/sql_error.h"
#include "sql/sql_executor.h"
#include "sql/sql_gipk.h"
#include "sql/sql_lex.h"
#include "sql/sql_list.h"
#include "sql/sql_optimizer.h"
#include "sql/sql_parse.h"
#include "sql/sql_partition.h"
#include "sql/sql_plugin.h"
#include "sql/sql_plugin_ref.h"
#include "sql/sql_profile.h"
#include "sql/sql_table.h"
#include "sql/sql_tmp_table.h"
#include "sql/sql_trigger.h"
#include "sql/strfunc.h"
#include "sql/system_variables.h"
#include "sql/table.h"
#include "sql/table_trigger_dispatcher.h"
#include "sql/temp_table_param.h"
#include "sql/thd_raii.h"
#include "sql/trigger.h"
#include "sql/tztime.h"
#include "sql_string.h"
#include "string_with_len.h"
#include "strmake.h"
#include "template_utils.h"
#include "thr_lock.h"

Classes
class	CSET_STRING
	Character set armed LEX_CSTRING. More...
struct	show_privileges_st
class	Show_create_error_handler
	An Internal_error_handler that suppresses errors regarding views' underlying tables that occur during privilege checking within SHOW CREATE VIEW commands. More...
class	thread_info
class	thread_info_compare
class	List_process_list
class	Fill_process_list
	This class implements callback function used by fill_schema_processlist() to populate all the client process information into I_S table. More...
class	Show_var_cmp
class	Add_status
	Collect status for all running threads. More...
struct	schema_table_ref
struct	run_hton_fill_schema_table_args

Macros
#define	TMP_TABLE_COLUMNS_COLUMN_NAME   0
#define	TMP_TABLE_COLUMNS_COLUMN_TYPE   1
#define	TMP_TABLE_COLUMNS_COLLATION_NAME   2
#define	TMP_TABLE_COLUMNS_IS_NULLABLE   3
#define	TMP_TABLE_COLUMNS_COLUMN_KEY   4
#define	TMP_TABLE_COLUMNS_COLUMN_DEFAULT   5
#define	TMP_TABLE_COLUMNS_EXTRA   6
#define	TMP_TABLE_COLUMNS_PRIVILEGES   7
#define	TMP_TABLE_COLUMNS_COLUMN_COMMENT   8
#define	TMP_TABLE_COLUMNS_GENERATION_EXPRESSION   9
#define	TMP_TABLE_KEYS_TABLE_NAME   0
#define	TMP_TABLE_KEYS_IS_NON_UNIQUE   1
#define	TMP_TABLE_KEYS_INDEX_SCHEMA   2
#define	TMP_TABLE_KEYS_INDEX_NAME   3
#define	TMP_TABLE_KEYS_SEQ_IN_INDEX   4
#define	TMP_TABLE_KEYS_COLUMN_NAME   5
#define	TMP_TABLE_KEYS_COLLATION   6
#define	TMP_TABLE_KEYS_CARDINALITY   7
#define	TMP_TABLE_KEYS_SUB_PART   8
#define	TMP_TABLE_KEYS_PACKED   9
#define	TMP_TABLE_KEYS_IS_NULLABLE   10
#define	TMP_TABLE_KEYS_INDEX_TYPE   11
#define	TMP_TABLE_KEYS_COMMENT   12
#define	TMP_TABLE_KEYS_INDEX_COMMENT   13
#define	TMP_TABLE_KEYS_IS_VISIBLE   14
#define	TMP_TABLE_KEYS_EXPRESSION   15

Typedefs
typedef Mem_root_array< thread_info * >	Thread_info_array
	This class implements callback function used by mysqld_list_processes() to list all the client process information. More...
typedef std::vector< SHOW_VAR >	Status_var_array

Functions
bool	iterate_all_dynamic_privileges (THD *thd, std::function< bool(const char *)> action)
static void	store_key_options (THD *thd, String *packet, TABLE *table, KEY *key_info)
static void	get_cs_converted_string_value (THD *thd, String *input_str, String *output_str, const CHARSET_INFO *cs, bool use_hex)
static void	append_algorithm (Table_ref *table, String *buff)
	Append ALGORITHM clause to the given buffer. More...
static void	view_store_create_info (const THD *thd, Table_ref *table, String *buff)
static bool	try_acquire_high_prio_shared_mdl_lock (THD *thd, Table_ref *table, bool can_deadlock)
	Try acquire high priority share metadata lock on a table (with optional wait for conflicting locks to go away). More...
static size_t	make_version_string (char *buf, size_t buf_length, uint version)
static bool	show_plugins (THD *thd, plugin_ref plugin, void *arg)
static int	fill_plugins (THD *thd, Table_ref *tables, Item *)
bool	mysqld_show_privileges (THD *thd)
bool	mysqld_show_create (THD *thd, Table_ref *table_list)
bool	mysqld_show_create_db (THD *thd, char *dbname, HA_CREATE_INFO *create_info)
void	mysqld_list_fields (THD *thd, Table_ref *table_list, const char *wild)
static const char *	require_quotes (const char *name, size_t name_length)
void	append_identifier (String *packet, const char *name, size_t length)
	Convert and quote the given identifier if needed and append it to the target string. More...
void	append_identifier (const THD *thd, String *packet, const char *name, size_t length, const CHARSET_INFO *from_cs, const CHARSET_INFO *to_cs)
	Convert and quote the given identifier if needed and append it to the target string. More...
int	get_quote_char_for_identifier (const THD *thd, const char *name, size_t length)
void	append_identifier (const THD *thd, String *packet, const char *name, size_t length)
static void	append_directory (THD *thd, String *packet, const char *dir_type, const char *filename)
static bool	print_on_update_clause (Field *field, String *val, bool lcase)
	Print "ON UPDATE" clause of a field into a string. More...
static bool	print_default_clause (THD *thd, Field *field, String *def_value, bool quoted)
	Print "DEFAULT" clause of a field into a string. More...
static bool	should_print_encryption_clause (THD *thd, TABLE_SHARE *share, bool *print)
static void	print_foreign_key_info (THD *thd, const LEX_CSTRING *db, const dd::Table *table_obj, String *packet)
	Append definitions of FOREIGN KEY statements to SHOW CREATE TABLE statement output for the table. More...
bool	store_create_info (THD *thd, Table_ref *table_list, String *packet, HA_CREATE_INFO *create_info_arg, bool show_database, bool for_show_create_stmt)
	Build a CREATE TABLE statement for a table. More...
void	view_store_options (const THD *thd, Table_ref *table, String *buff)
void	append_definer (const THD *thd, String *buffer, const LEX_CSTRING &definer_user, const LEX_CSTRING &definer_host)
	Append DEFINER clause to the given buffer. More...
static const char *	thread_state_info (THD *invoking_thd, THD *inspected_thd)
void	mysqld_list_processes (THD *thd, const char *user, bool verbose, bool has_cursor)
	List running processes (actually connected sessions). More...
static int	fill_schema_processlist (THD *thd, Table_ref *tables, Item *)
Status_var_array	all_status_vars (0)
static int	show_var_cmp (const SHOW_VAR *var1, const SHOW_VAR *var2)
static bool	is_show_undef (const SHOW_VAR &var)
static void	shrink_var_array (Status_var_array *array)
bool	add_status_vars (const SHOW_VAR *list)
void	init_status_vars ()
void	reset_status_vars ()
ulonglong	get_status_vars_version (void)
void	free_status_vars ()
static bool	get_recursive_status_var_inner (THD *thd, SHOW_VAR *list, bool is_a_list, const char *name, char *const value, enum_var_type var_type, size_t *length, const CHARSET_INFO **charset)
	Search for a status variable and gets its string value. More...
bool	get_recursive_status_var (THD *thd, const char *name, char *const value, enum_var_type var_type, size_t *length, const CHARSET_INFO **charset)
	Get the string value of a status variable. More...
void	remove_status_vars (SHOW_VAR *list)
const char *	get_one_variable (THD *thd, const SHOW_VAR *variable, enum_var_type value_type, SHOW_TYPE show_type, System_status_var *status_var, const CHARSET_INFO **charset, char *buff, size_t *length, bool *is_null)
	Returns the value of a system or a status variable. More...
const char *	get_one_variable_ext (THD *running_thd, THD *target_thd, const SHOW_VAR *variable, enum_var_type value_type, SHOW_TYPE show_type, System_status_var *status_var, const CHARSET_INFO **charset, char *buff, size_t *length, bool *is_null)
	Returns the value of a system or a status variable. More...
void	calc_sum_of_all_status (System_status_var *to)
bool	schema_table_store_record (THD *thd, TABLE *table)
int	schema_table_store_record2 (THD *thd, TABLE *table, bool make_ondisk)
	Store record to I_S table, convert HEAP table to InnoDB table if necessary. More...
bool	convert_heap_table_to_ondisk (THD *thd, TABLE *table, int error)
	Convert HEAP table to InnoDB table if necessary. More...
bool	make_table_list (THD *thd, Query_block *sel, const LEX_CSTRING &db_name, const LEX_CSTRING &table_name)
	Prepare a Table_ident and add a table_list into Query_block. More...
enum enum_schema_tables	get_schema_table_idx (ST_SCHEMA_TABLE *schema_table)
static int	show_temporary_tables (THD *thd, Table_ref *tables, Item *)
	Implementation of SHOW INDEX / SHOW COLUMNS for temporary tables. More...
static int	get_schema_tmp_table_columns_record (THD *thd, Table_ref *tables, TABLE *table, bool res, LEX_CSTRING db_name, LEX_CSTRING table_name)
static bool	iter_schema_engines (THD *thd, plugin_ref plugin, void *ptable)
static int	fill_schema_engines (THD *thd, Table_ref *tables, Item *)
static int	get_schema_tmp_table_keys_record (THD *thd, Table_ref *tables, TABLE *table, bool res, LEX_CSTRING, LEX_CSTRING table_name)
bool	get_cs_converted_part_value_from_string (THD *thd, Item *item, String *input_str, String *output_str, const CHARSET_INFO *cs, bool use_hex)
static int	fill_open_tables (THD *thd, Table_ref *tables, Item *)
static bool	find_schema_table_in_plugin (THD *, plugin_ref plugin, void *p_table)
ST_SCHEMA_TABLE *	find_schema_table (THD *thd, const char *table_name)
ST_SCHEMA_TABLE *	get_schema_table (enum enum_schema_tables schema_table_idx)
static TABLE *	create_schema_table (THD *thd, Table_ref *table_list)
	Create information_schema table using schema_table data. More...
static int	make_old_format (THD *thd, ST_SCHEMA_TABLE *schema_table)
static int	make_tmp_table_columns_format (THD *thd, ST_SCHEMA_TABLE *schema_table)
bool	mysql_schema_table (THD *thd, LEX *lex, Table_ref *table_list)
	Create information_schema table. More...
bool	make_schema_query_block (THD *thd, Query_block *sel, enum enum_schema_tables schema_table_idx)
	Generate select from information_schema table. More...
bool	do_fill_information_schema_table (THD *thd, Table_ref *table_list, Item *condition)
	Fill INFORMATION_SCHEMA-table, leave correct Diagnostics_area state after itself. More...
int	initialize_schema_table (st_plugin_int *plugin)
int	finalize_schema_table (st_plugin_int *plugin)
static bool	show_create_trigger_impl (THD *thd, Trigger *trigger)
	Output trigger information (SHOW CREATE TRIGGER) to the client. More...
static Table_ref *	get_trigger_table (THD *thd, const sp_name *trg_name)
	Read the Data Dictionary to obtain base table name for the specified trigger name and construct TABE_LIST object for the base table. More...
static bool	acquire_mdl_for_table (THD *thd, const char *db_name, const char *table_name)
	Acquire shared MDL lock for a specified database name/table name. More...
static Trigger *	find_trigger_in_share (TABLE_SHARE *share, const LEX_STRING &name)
	Helper to look up a Trigger object in a TABLE_SHARE by trigger name. More...
bool	show_create_trigger (THD *thd, const sp_name *trg_name)
	SHOW CREATE TRIGGER high-level implementation. More...
void	initialize_information_schema_acl ()
void	show_sql_type (enum_field_types type, bool is_array, uint metadata, String *str, const CHARSET_INFO *field_cs, unsigned int vector_dimensionality)
	A field's SQL type printout. More...

Variables
std::atomic_ulong	deprecated_use_i_s_processlist_count = 0
	Count number of times information_schema.processlist has been used. More...
std::atomic_ullong	deprecated_use_i_s_processlist_last_timestamp = 0
	Last time information_schema.processlist was used, as usec since epoch. More...
static const char *	grant_names []
TYPELIB	grant_types
static struct show_privileges_st	sys_privileges []
bool	status_vars_inited = false
ulonglong	status_var_array_version = 0
ST_SCHEMA_TABLE	schema_tables []
ST_FIELD_INFO	engines_fields_info []
ST_FIELD_INFO	tmp_table_keys_fields_info []
static const int	GRANTEE_MAX_CHAR_LENGTH
	Grantee is of form 'user'@'hostname', so add +1 for '@' and +4 for the single quotes. More...
ST_FIELD_INFO	user_privileges_fields_info []
ST_FIELD_INFO	schema_privileges_fields_info []
ST_FIELD_INFO	table_privileges_fields_info []
ST_FIELD_INFO	column_privileges_fields_info []
ST_FIELD_INFO	open_tables_fields_info []
ST_FIELD_INFO	processlist_fields_info []
ST_FIELD_INFO	plugin_fields_info []
ST_FIELD_INFO	tmp_table_columns_fields_info []
ST_FIELD_INFO	optimizer_trace_info []
	For creating fields of information_schema.OPTIMIZER_TRACE. More...
static IS_internal_schema_access	is_internal_schema_access

Macro Definition Documentation

TMP_TABLE_COLUMNS_COLLATION_NAME

#define TMP_TABLE_COLUMNS_COLLATION_NAME   2

TMP_TABLE_COLUMNS_COLUMN_COMMENT

#define TMP_TABLE_COLUMNS_COLUMN_COMMENT   8

TMP_TABLE_COLUMNS_COLUMN_DEFAULT

#define TMP_TABLE_COLUMNS_COLUMN_DEFAULT   5

TMP_TABLE_COLUMNS_COLUMN_KEY

#define TMP_TABLE_COLUMNS_COLUMN_KEY   4

TMP_TABLE_COLUMNS_COLUMN_NAME

#define TMP_TABLE_COLUMNS_COLUMN_NAME   0

TMP_TABLE_COLUMNS_COLUMN_TYPE

#define TMP_TABLE_COLUMNS_COLUMN_TYPE   1

TMP_TABLE_COLUMNS_EXTRA

#define TMP_TABLE_COLUMNS_EXTRA   6

TMP_TABLE_COLUMNS_GENERATION_EXPRESSION

#define TMP_TABLE_COLUMNS_GENERATION_EXPRESSION   9

TMP_TABLE_COLUMNS_IS_NULLABLE

#define TMP_TABLE_COLUMNS_IS_NULLABLE   3

TMP_TABLE_COLUMNS_PRIVILEGES

#define TMP_TABLE_COLUMNS_PRIVILEGES   7

TMP_TABLE_KEYS_CARDINALITY

#define TMP_TABLE_KEYS_CARDINALITY   7

TMP_TABLE_KEYS_COLLATION

#define TMP_TABLE_KEYS_COLLATION   6

TMP_TABLE_KEYS_COLUMN_NAME

#define TMP_TABLE_KEYS_COLUMN_NAME   5

TMP_TABLE_KEYS_COMMENT

#define TMP_TABLE_KEYS_COMMENT   12

TMP_TABLE_KEYS_EXPRESSION

#define TMP_TABLE_KEYS_EXPRESSION   15

TMP_TABLE_KEYS_INDEX_COMMENT

#define TMP_TABLE_KEYS_INDEX_COMMENT   13

TMP_TABLE_KEYS_INDEX_NAME

#define TMP_TABLE_KEYS_INDEX_NAME   3

TMP_TABLE_KEYS_INDEX_SCHEMA

#define TMP_TABLE_KEYS_INDEX_SCHEMA   2

TMP_TABLE_KEYS_INDEX_TYPE

#define TMP_TABLE_KEYS_INDEX_TYPE   11

TMP_TABLE_KEYS_IS_NON_UNIQUE

#define TMP_TABLE_KEYS_IS_NON_UNIQUE   1

TMP_TABLE_KEYS_IS_NULLABLE

#define TMP_TABLE_KEYS_IS_NULLABLE   10

TMP_TABLE_KEYS_IS_VISIBLE

#define TMP_TABLE_KEYS_IS_VISIBLE   14

TMP_TABLE_KEYS_PACKED

#define TMP_TABLE_KEYS_PACKED   9

TMP_TABLE_KEYS_SEQ_IN_INDEX

#define TMP_TABLE_KEYS_SEQ_IN_INDEX   4

TMP_TABLE_KEYS_SUB_PART

#define TMP_TABLE_KEYS_SUB_PART   8

TMP_TABLE_KEYS_TABLE_NAME

#define TMP_TABLE_KEYS_TABLE_NAME   0

Typedef Documentation

Status_var_array

typedef std::vector<SHOW_VAR> Status_var_array

Thread_info_array

typedef Mem_root_array<thread_info *> Thread_info_array

This class implements callback function used by mysqld_list_processes() to list all the client process information.

Function Documentation

acquire_mdl_for_table()

static bool acquire_mdl_for_table ( THD *  thd, const char *  db_name, const char *  table_name  )

static

Acquire shared MDL lock for a specified database name/table name.

Parameters

thd	Thread context.
db_name	Database name.
table_name	Table name.

Returns

Operation status

Return values

true	Error.
false	Success.

add_status_vars()

bool add_status_vars

(

const SHOW_VAR *

list

)

all_status_vars()

Status_var_array all_status_vars

(

0

)

append_algorithm()

static void append_algorithm ( Table_ref *  table, String *  buff  )

static

Append ALGORITHM clause to the given buffer.

Parameters

	table	VIEW definition
[in,out]	buff	buffer to hold ALGORITHM clause

append_definer()

void append_definer	(	const THD *	thd,
		String *	buffer,
		const LEX_CSTRING &	definer_user,
		const LEX_CSTRING &	definer_host
	)

Append DEFINER clause to the given buffer.

Parameters

	thd	thread handle
[in,out]	buffer	buffer to hold DEFINER clause
	definer_user	user name part of definer
	definer_host	host name part of definer

append_directory()

static void append_directory ( THD *  thd, String *  packet, const char *  dir_type, const char *  filename  )

static

append_identifier() [1/3]

void append_identifier	(	const THD *	thd,
		String *	packet,
		const char *	name,
		size_t	length
	)

append_identifier() [2/3]

void append_identifier	(	const THD *	thd,
		String *	packet,
		const char *	name,
		size_t	length,
		const CHARSET_INFO *	from_cs,
		const CHARSET_INFO *	to_cs
	)

Convert and quote the given identifier if needed and append it to the target string.

If the given identifier is empty, it will be quoted.

Parameters

thd	thread handler
packet	target string
name	the identifier to be appended
length	length of the appending identifier
from_cs	Charset information about the input string
to_cs	Charset information about the target string

append_identifier() [3/3]

void append_identifier	(	String *	packet,
		const char *	name,
		size_t	length
	)

Convert and quote the given identifier if needed and append it to the target string.

If the given identifier is empty, it will be quoted. This function always use the backtick as escape char and thus rid itself of the THD dependency.

Parameters

packet	target string
name	the identifier to be appended
length	length of the appending identifier

calc_sum_of_all_status()

void calc_sum_of_all_status

(

System_status_var *

to

)

convert_heap_table_to_ondisk()

bool convert_heap_table_to_ondisk	(	THD *	thd,
		TABLE *	table,
		int	error
	)

Convert HEAP table to InnoDB table if necessary.

Parameters

[in]	thd	thread handler
[in]	table	Information schema table to be converted.
[in]	error	the error code returned previously.

Returns

false on success, true on error.

create_schema_table()

static TABLE * create_schema_table ( THD *  thd, Table_ref *  table_list  )

static

Create information_schema table using schema_table data.

Note

For MYSQL_TYPE_DECIMAL fields only, the field_length member has encoded into it two numbers, based on modulus of base-10 numbers. In the ones position is the number of decimals. Tens position is unused. In the hundreds and thousands position is a two-digit decimal number representing length. Encode this value with (decimals*100)+length , where 0<decimals<10 and 0<=length<100 .

Parameters

thd	thread handler
table_list	Used to pass I_S table information(fields info, tables parameters etc) and table name.

Returns

Pointer to created table

Return values

NULL	Can't create table

do_fill_information_schema_table()

bool do_fill_information_schema_table	(	THD *	thd,
		Table_ref *	table_list,
		Item *	condition
	)

Fill INFORMATION_SCHEMA-table, leave correct Diagnostics_area state after itself.

This function is a wrapper around ST_SCHEMA_TABLE::fill_table(), which may "partially silence" some errors. The thing is that during fill_table() many errors might be emitted. These errors stem from the nature of fill_table().

For example, SELECT ... FROM INFORMATION_SCHEMA.xxx WHERE TABLE_NAME = 'xxx' results in a number of 'Table <db name>.xxx does not exist' errors, because fill_table() tries to open the 'xxx' table in every possible database.

Those errors are cleared (the error status is cleared from Diagnostics_area) inside fill_table(), but they remain in the Diagnostics_area condition list (the list is not cleared because it may contain useful warnings).

This function is responsible for making sure that Diagnostics_area does not contain warnings corresponding to the cleared errors.

Note

: THD::no_warnings_for_error used to be set before calling fill_table(), thus those errors didn't go to Diagnostics_area. This is not the case now (THD::no_warnings_for_error was eliminated as a hack), so we need to take care of those warnings here.

Parameters

thd	Thread context.
table_list	I_S table.
condition	Condition, which can be used to do less file manipulations (for example, WHERE TABLE_SCHEMA='test' allows to open only directory 'test', not other database directories).

Returns

Error status.

Return values

true	Error.
false	Success.

fill_open_tables()

static int fill_open_tables ( THD *  thd, Table_ref *  tables, Item *    )

static

fill_plugins()

static int fill_plugins ( THD *  thd, Table_ref *  tables, Item *    )

static

fill_schema_engines()

static int fill_schema_engines ( THD *  thd, Table_ref *  tables, Item *    )

static

fill_schema_processlist()

static int fill_schema_processlist ( THD *  thd, Table_ref *  tables, Item *    )

static

finalize_schema_table()

int finalize_schema_table

(

st_plugin_int *

plugin

)

find_schema_table()

ST_SCHEMA_TABLE * find_schema_table	(	THD *	thd,
		const char *	table_name
	)

find_schema_table_in_plugin()

static bool find_schema_table_in_plugin ( THD *  , plugin_ref  plugin, void *  p_table  )

static

find_trigger_in_share()

static Trigger * find_trigger_in_share ( TABLE_SHARE *  share, const LEX_STRING &  name  )

static

Helper to look up a Trigger object in a TABLE_SHARE by trigger name.

Parameters

share	TABLE_SHARE in whose list of Trigger objects the lookup is to be performed.
name	Name of trigger to find.

Returns

Pointer to Trigger object, or nullptr if no trigger with the provided name was found.

free_status_vars()

void free_status_vars

(

)

get_cs_converted_part_value_from_string()

bool get_cs_converted_part_value_from_string	(	THD *	thd,
		Item *	item,
		String *	input_str,
		String *	output_str,
		const CHARSET_INFO *	cs,
		bool	use_hex
	)

get_cs_converted_string_value()

static void get_cs_converted_string_value ( THD *  thd, String *  input_str, String *  output_str, const CHARSET_INFO *  cs, bool  use_hex  )

static

get_one_variable()

const char * get_one_variable	(	THD *	thd,
		const SHOW_VAR *	variable,
		enum_var_type	value_type,
		SHOW_TYPE	show_type,
		System_status_var *	status_var,
		const CHARSET_INFO **	charset,
		char *	buff,
		size_t *	length,
		bool *	is_null
	)

Returns the value of a system or a status variable.

Parameters

	thd	The handle of the current THD.
	variable	Details of the variable.
	value_type	Variable type.
	show_type	Variable show type.
	status_var	Status values or NULL if for system variable.
[out]	charset	Character set of the value.
[in,out]	buff	Buffer to store the value.
[out]	length	Length of the value.
[out]	is_null	Is variable value NULL or not.

Returns

Pointer to the value buffer.

get_one_variable_ext()

const char * get_one_variable_ext	(	THD *	running_thd,
		THD *	target_thd,
		const SHOW_VAR *	variable,
		enum_var_type	value_type,
		SHOW_TYPE	show_type,
		System_status_var *	status_var,
		const CHARSET_INFO **	charset,
		char *	buff,
		size_t *	length,
		bool *	is_null
	)

Returns the value of a system or a status variable.

Parameters

	running_thd	The handle of the current THD.
	target_thd	The handle of the remote THD.
	variable	Details of the variable.
	value_type	Variable type.
	show_type	Variable show type.
	status_var	Status values or NULL if for system variable.
[out]	charset	Character set of the value.
[in,out]	buff	Buffer to store the value.
[out]	length	Length of the value.
[out]	is_null	Is variable value NULL or not. This parameter is set only for variables of string type.

Returns

Pointer to the value buffer.

get_quote_char_for_identifier()

int get_quote_char_for_identifier	(	const THD *	thd,
		const char *	name,
		size_t	length
	)

get_recursive_status_var()

bool get_recursive_status_var	(	THD *	thd,
		const char *	name,
		char *const	value,
		enum_var_type	var_type,
		size_t *	length,
		const CHARSET_INFO **	charset
	)

Get the string value of a status variable.

A top level API

Takes the LOCK_status lock and iterates over the registered status variable array all_status_vars to evaluate the value of a named status variable by calling get_recursive_status_var_inner for each element in all_status_vars.

Get the value of given status variable

Parameters

[in]	thd	thread handler
[in]	name	name of the status variable
[in]	var_type	Variable type
[in,out]	value	buffer in which value of the status variable needs to be filled in
[in,out]	length	filled with buffer length
[out]	charset	charset of the data returned

Returns

status

Return values

false	if variable is not found in the list
true	if variable is found in the list

get_recursive_status_var_inner()

static bool get_recursive_status_var_inner ( THD *  thd, SHOW_VAR *  list, bool  is_a_list, const char *  name, char *const  value, enum_var_type  var_type, size_t *  length, const CHARSET_INFO **  charset  )

static

Search for a status variable and gets its string value.

Check if the supplied SHOW_VAR contains the status variable, diving into SHOW_ARRAY arrays and evaluating SHOW_FUNC functions as needed. Can be called recursively. If a variable is found its string value is produced by calling get_one_variable.

Used in conjunction with get_recursive_status_var

Get the value of given status variable

Parameters

[in]	thd	thread handler
[in]	list	list of SHOW_VAR objects in which function should search
[in]	is_a_list	true if it's a list array that needs to be iterated
[in]	name	name of the status variable
[in]	var_type	Variable type
[in,out]	value	buffer in which value of the status variable needs to be filled in
[in,out]	length	filled with buffer length
[out]	charset	charset of the data returned

Returns

status

Return values

false	if variable is not found in the list
true	if variable is found in the list

get_schema_table()

ST_SCHEMA_TABLE * get_schema_table

(

enum enum_schema_tables

schema_table_idx

)

get_schema_table_idx()

enum enum_schema_tables get_schema_table_idx

(

ST_SCHEMA_TABLE *

schema_table

)

get_schema_tmp_table_columns_record()

static int get_schema_tmp_table_columns_record ( THD *  thd, Table_ref *  tables, TABLE *  table, bool  res, LEX_CSTRING  db_name, LEX_CSTRING  table_name  )

static

get_schema_tmp_table_keys_record()

static int get_schema_tmp_table_keys_record ( THD *  thd, Table_ref *  tables, TABLE *  table, bool  res, LEX_CSTRING  , LEX_CSTRING  table_name  )

static

get_status_vars_version()

ulonglong get_status_vars_version

(

void

)

get_trigger_table()

static Table_ref * get_trigger_table ( THD *  thd, const sp_name *  trg_name  )

static

Read the Data Dictionary to obtain base table name for the specified trigger name and construct TABE_LIST object for the base table.

Parameters

thd	Thread context.
trg_name	Trigger name.

Returns

Table_ref object corresponding to the base table.

TODO: This function is a copy&paste from add_table_to_list() and sp_add_to_query_tables(). The problem is that in order to be compatible with Stored Programs (Prepared Statements), we should not touch thd->lex. The "source" functions also add created Table_ref object to the thd->lex->query_tables.

The plan to eliminate this copy&paste is to:

• get rid of sp_add_to_query_tables() and use Lex::add_table_to_list(). Only add_table_to_list() must be used to add tables from the parser into Lex::query_tables list.
• do not update Lex::query_tables in add_table_to_list().

init_status_vars()

void init_status_vars

(

)

initialize_information_schema_acl()

void initialize_information_schema_acl

(

)

initialize_schema_table()

int initialize_schema_table

(

st_plugin_int *

plugin

)

is_show_undef()

static bool is_show_undef ( const SHOW_VAR &  var )

inlinestatic

iter_schema_engines()

static bool iter_schema_engines ( THD *  thd, plugin_ref  plugin, void *  ptable  )

static

iterate_all_dynamic_privileges()

bool iterate_all_dynamic_privileges	(	THD *	thd,
		std::function< bool(const char *)>	action
	)

make_old_format()

static int make_old_format ( THD *  thd, ST_SCHEMA_TABLE *  schema_table  )

static

make_schema_query_block()

bool make_schema_query_block	(	THD *	thd,
		Query_block *	sel,
		enum enum_schema_tables	schema_table_idx
	)

Generate select from information_schema table.

Parameters

thd	thread handler
sel	pointer to Query_block
schema_table_idx	index of 'schema_tables' element

Returns

true on error, false otherwise

make_table_list()

bool make_table_list	(	THD *	thd,
		Query_block *	sel,
		const LEX_CSTRING &	db_name,
		const LEX_CSTRING &	table_name
	)

Prepare a Table_ident and add a table_list into Query_block.

Parameters

thd	Thread
sel	Instance of Query_block.
db_name	Database name.
table_name	Table name.

Returns

true on failure. false on success.

make_tmp_table_columns_format()

static int make_tmp_table_columns_format ( THD *  thd, ST_SCHEMA_TABLE *  schema_table  )

static

make_version_string()

static size_t make_version_string ( char *  buf, size_t  buf_length, uint  version  )

static

mysql_schema_table()

bool mysql_schema_table	(	THD *	thd,
		LEX *	lex,
		Table_ref *	table_list
	)

Create information_schema table.

Parameters

thd	thread handler
lex	pointer to LEX
table_list	pointer to table_list

Returns

true on error, false otherwise.

mysqld_list_fields()

void mysqld_list_fields	(	THD *	thd,
		Table_ref *	table_list,
		const char *	wild
	)

mysqld_list_processes()

void mysqld_list_processes	(	THD *	thd,
		const char *	user,
		bool	verbose,
		bool	has_cursor
	)

List running processes (actually connected sessions).

Parameters

thd	thread handle.
user	Username of connected client.
verbose	if false, limit output to PROCESS_LIST_WIDTH characters.
has_cursor	if true, called from a command object that handles terminatation of sending to client, otherwise terminate explicitly with my_eof() call.

mysqld_show_create()

bool mysqld_show_create	(	THD *	thd,
		Table_ref *	table_list
	)

mysqld_show_create_db()

bool mysqld_show_create_db	(	THD *	thd,
		char *	dbname,
		HA_CREATE_INFO *	create_info
	)

mysqld_show_privileges()

bool mysqld_show_privileges

(

THD *

thd

)

print_default_clause()

static bool print_default_clause ( THD *  thd, Field *  field, String *  def_value, bool  quoted  )

static

Print "DEFAULT" clause of a field into a string.

Parameters

thd	The THD to create the DEFAULT clause for.
field	The field to generate the DEFAULT clause for.
def_value	String to write the DEFAULT clause to to.
quoted	Whether to quote the default value. false for not needed (value will became its own field (with its own charset) in a table); true for quote (as part of a SHOW CREATE statement).

Returns

true if field has a DEFAULT value, false otherwise.

print_foreign_key_info()

static void print_foreign_key_info ( THD *  thd, const LEX_CSTRING *  db, const dd::Table *  table_obj, String *  packet  )

static

Append definitions of FOREIGN KEY statements to SHOW CREATE TABLE statement output for the table.

Parameters

	thd	Thread context.
	db	Table's database.
	table_obj	dd::Table describing the table.
[in,out]	packet	Pointer to a string where CREATE TABLE statement describing the table is being constructed.

print_on_update_clause()

static bool print_on_update_clause ( Field *  field, String *  val, bool  lcase  )

static

Print "ON UPDATE" clause of a field into a string.

Parameters

field	The field to generate ON UPDATE clause for.
val	String to write ON UPDATE clause to to
lcase	Whether to print in lower case.

Returns

false on success, true on error.

remove_status_vars()

void remove_status_vars

(

SHOW_VAR *

list

)

require_quotes()

static const char * require_quotes ( const char *  name, size_t  name_length  )

static

reset_status_vars()

void reset_status_vars

(

)

schema_table_store_record()

bool schema_table_store_record	(	THD *	thd,
		TABLE *	table
	)

schema_table_store_record2()

int schema_table_store_record2	(	THD *	thd,
		TABLE *	table,
		bool	make_ondisk
	)

Store record to I_S table, convert HEAP table to InnoDB table if necessary.

Parameters

[in]	thd	thread handler
[in]	table	Information schema table to be updated
[in]	make_ondisk	if true, convert heap table to on disk table. default value is true.

Returns

0 on success

error code on failure.

should_print_encryption_clause()

static bool should_print_encryption_clause ( THD *  thd, TABLE_SHARE *  share, bool *  print  )

static

show_create_trigger()

bool show_create_trigger	(	THD *	thd,
		const sp_name *	trg_name
	)

SHOW CREATE TRIGGER high-level implementation.

Parameters

thd	Thread context.
trg_name	Trigger name.

Returns

Operation status

Return values

true	Error.
false	Success.

show_create_trigger_impl()

static bool show_create_trigger_impl ( THD *  thd, Trigger *  trigger  )

static

Output trigger information (SHOW CREATE TRIGGER) to the client.

Parameters

thd	Thread context.
trigger	table trigger to dump.

Returns

Operation status

Return values

true	Error.
false	Success.

show_plugins()

static bool show_plugins ( THD *  thd, plugin_ref  plugin, void *  arg  )

static

show_sql_type()

void show_sql_type	(	enum_field_types	type,
		bool	is_array,
		uint	metadata,
		String *	str,
		const CHARSET_INFO *	field_cs,
		unsigned int	vector_dimensionality
	)

A field's SQL type printout.

Parameters

type	the type to print
is_array	whether the field is a typed array
metadata	field's metadata, depending on the type could be nothing, length, or length + decimals
str	String to print to
field_cs	field's charset. When given [var]char length is printed in characters, otherwise - in bytes
vector_dimensionality	The dimensionality of a vector field

show_temporary_tables()

static int show_temporary_tables ( THD *  thd, Table_ref *  tables, Item *    )

static

Implementation of SHOW INDEX / SHOW COLUMNS for temporary tables.

Parameters

thd	Thread handle
tables	Table to fill with data

show_var_cmp()

static int show_var_cmp ( const SHOW_VAR *  var1, const SHOW_VAR *  var2  )

inlinestatic

shrink_var_array()

static void shrink_var_array ( Status_var_array *  array )

static

store_create_info()

bool store_create_info ( THD *  thd, Table_ref *  table_list, String *  packet, HA_CREATE_INFO *  create_info_arg, bool  show_database, bool  for_show_create_stmt  )

constexpr

Build a CREATE TABLE statement for a table.

Characters shown for the command in 'show processlist'.

Parameters

thd	The thread
table_list	A list containing one table to write statement for.
packet	Pointer to a string where statement will be written.
create_info_arg	Pointer to create information that can be used to tailor the format of the statement. Can be NULL, in which case only SQL_MODE is considered when building the statement.
show_database	If true, then print the database before the table name. The database name is only printed in the event that it is different from the current database. If false, then do not print the database before the table name.
for_show_create_stmt	If true, then build CREATE TABLE statement for SHOW CREATE TABLE statement. If false, then store_create_info() is invoked to build CREATE TABLE statement while logging event to binlog.

Returns

true if error, false otherwise.

Append START TRANSACTION for CREATE SELECT on SE supporting atomic DDL. This is done only while binlogging CREATE TABLE AS SELECT.

store_key_options()

static void store_key_options ( THD *  thd, String *  packet, TABLE *  table, KEY *  key_info  )

static

thread_state_info()

static const char * thread_state_info ( THD *  invoking_thd, THD *  inspected_thd  )

static

try_acquire_high_prio_shared_mdl_lock()

static bool try_acquire_high_prio_shared_mdl_lock ( THD *  thd, Table_ref *  table, bool  can_deadlock  )

static

Try acquire high priority share metadata lock on a table (with optional wait for conflicting locks to go away).

Parameters

thd	Thread context.
table	Table list element for the table
can_deadlock	Indicates that deadlocks are possible due to metadata locks, so to avoid them we should not wait in case if conflicting lock is present.

Note

This is an auxiliary function to be used in cases when we want to access table's description by looking up info in TABLE_SHARE without going through full-blown table open.

This function assumes that there are no other metadata lock requests in the current metadata locking context.

Return values

false	No error, if lock was obtained Table_ref::mdl_request::ticket is set to non-NULL value.
true	Some error occurred (probably thread was killed).

view_store_create_info()

static void view_store_create_info ( const THD *  thd, Table_ref *  table, String *  buff  )

static

view_store_options()

void view_store_options	(	const THD *	thd,
		Table_ref *	table,
		String *	buff
	)

Variable Documentation

column_privileges_fields_info

ST_FIELD_INFO column_privileges_fields_info[]

Initial value:

= {
    {"GRANTEE", GRANTEE_MAX_CHAR_LENGTH, MYSQL_TYPE_STRING, 0, 0, nullptr, 0},
    {"TABLE_CATALOG", FN_REFLEN, MYSQL_TYPE_STRING, 0, 0, nullptr, 0},
    {"TABLE_SCHEMA", NAME_CHAR_LEN, MYSQL_TYPE_STRING, 0, 0, nullptr, 0},
    {"TABLE_NAME", NAME_CHAR_LEN, MYSQL_TYPE_STRING, 0, 0, nullptr, 0},
    {"COLUMN_NAME", NAME_CHAR_LEN, MYSQL_TYPE_STRING, 0, 0, nullptr, 0},
    {"PRIVILEGE_TYPE", NAME_CHAR_LEN, MYSQL_TYPE_STRING, 0, 0, nullptr, 0},
    {"IS_GRANTABLE", 3, MYSQL_TYPE_STRING, 0, 0, nullptr, 0},
    {nullptr, 0, MYSQL_TYPE_STRING, 0, 0, nullptr, 0}}

deprecated_use_i_s_processlist_count

std::atomic_ulong deprecated_use_i_s_processlist_count = 0

Count number of times information_schema.processlist has been used.

deprecated_use_i_s_processlist_last_timestamp

std::atomic_ullong deprecated_use_i_s_processlist_last_timestamp = 0

Last time information_schema.processlist was used, as usec since epoch.

engines_fields_info

ST_FIELD_INFO engines_fields_info[]

Initial value:

= {
    {"ENGINE", 64, MYSQL_TYPE_STRING, 0, 0, "Engine", 0},
    {"SUPPORT", 8, MYSQL_TYPE_STRING, 0, 0, "Support", 0},
    {"COMMENT", 80, MYSQL_TYPE_STRING, 0, 0, "Comment", 0},
    {"TRANSACTIONS", 3, MYSQL_TYPE_STRING, 0, 1, "Transactions", 0},
    {"XA", 3, MYSQL_TYPE_STRING, 0, 1, "XA", 0},
    {"SAVEPOINTS", 3, MYSQL_TYPE_STRING, 0, 1, "Savepoints", 0},
    {nullptr, 0, MYSQL_TYPE_STRING, 0, 0, nullptr, 0}}

grant_names

const char* grant_names[]

static

Initial value:

= {
    "select",   "insert",  "update", "delete", "create",     "drop",  "reload",
    "shutdown", "process", "file",   "grant",  "references", "index", "alter"}

grant_types

TYPELIB grant_types

Initial value:

= {sizeof(grant_names) / sizeof(char **), "grant_types",
                       grant_names, nullptr}

GRANTEE_MAX_CHAR_LENGTH

const int GRANTEE_MAX_CHAR_LENGTH

static

Initial value:

=
    USERNAME_CHAR_LENGTH + 1 + HOSTNAME_LENGTH + 4

Grantee is of form 'user'@'hostname', so add +1 for '@' and +4 for the single quotes.

is_internal_schema_access

IS_internal_schema_access is_internal_schema_access

static

open_tables_fields_info

ST_FIELD_INFO open_tables_fields_info[]

Initial value:

= {
    {"Database", NAME_CHAR_LEN, MYSQL_TYPE_STRING, 0, 0, "Database", 0},
    {"Table", NAME_CHAR_LEN, MYSQL_TYPE_STRING, 0, 0, "Table", 0},
    {"In_use", 1, MYSQL_TYPE_LONGLONG, 0, 0, "In_use", 0},
    {"Name_locked", 4, MYSQL_TYPE_LONGLONG, 0, 0, "Name_locked", 0},
    {nullptr, 0, MYSQL_TYPE_STRING, 0, 0, nullptr, 0}}

optimizer_trace_info

ST_FIELD_INFO optimizer_trace_info[]

extern

For creating fields of information_schema.OPTIMIZER_TRACE.

plugin_fields_info

ST_FIELD_INFO plugin_fields_info[]

Initial value:

= {
    {"PLUGIN_NAME", NAME_CHAR_LEN, MYSQL_TYPE_STRING, 0, 0, "Name", 0},
    {"PLUGIN_VERSION", 20, MYSQL_TYPE_STRING, 0, 0, nullptr, 0},
    {"PLUGIN_STATUS", 10, MYSQL_TYPE_STRING, 0, 0, "Status", 0},
    {"PLUGIN_TYPE", 80, MYSQL_TYPE_STRING, 0, 0, "Type", 0},
    {"PLUGIN_TYPE_VERSION", 20, MYSQL_TYPE_STRING, 0, 0, nullptr, 0},
    {"PLUGIN_LIBRARY", NAME_CHAR_LEN, MYSQL_TYPE_STRING, 0, 1, "Library", 0},
    {"PLUGIN_LIBRARY_VERSION", 20, MYSQL_TYPE_STRING, 0, 1, nullptr, 0},
    {"PLUGIN_AUTHOR", NAME_CHAR_LEN, MYSQL_TYPE_STRING, 0, 1, nullptr, 0},
    {"PLUGIN_DESCRIPTION", 65535, MYSQL_TYPE_STRING, 0, 1, nullptr, 0},
    {"PLUGIN_LICENSE", 80, MYSQL_TYPE_STRING, 0, 1, "License", 0},
    {"LOAD_OPTION", 64, MYSQL_TYPE_STRING, 0, 0, nullptr, 0},
    {nullptr, 0, MYSQL_TYPE_STRING, 0, 0, nullptr, 0}}

processlist_fields_info

ST_FIELD_INFO processlist_fields_info[]

Initial value:

= {
    {"ID", 21, MYSQL_TYPE_LONGLONG, 0, MY_I_S_UNSIGNED, "Id", 0},
    {"USER", USERNAME_CHAR_LENGTH, MYSQL_TYPE_STRING, 0, 0, "User", 0},
    {"HOST", HOST_AND_PORT_LENGTH, MYSQL_TYPE_STRING, 0, 0, "Host", 0},
    {"DB", NAME_CHAR_LEN, MYSQL_TYPE_STRING, 0, 1, "Db", 0},
    {"COMMAND", 16, MYSQL_TYPE_STRING, 0, 0, "Command", 0},
    {"TIME", 7, MYSQL_TYPE_LONG, 0, 0, "Time", 0},
    {"STATE", 64, MYSQL_TYPE_STRING, 0, 1, "State", 0},
    {"INFO", PROCESS_LIST_INFO_WIDTH, MYSQL_TYPE_STRING, 0, 1, "Info", 0},
    {nullptr, 0, MYSQL_TYPE_STRING, 0, 0, nullptr, 0}}

schema_privileges_fields_info

ST_FIELD_INFO schema_privileges_fields_info[]

Initial value:

= {
    {"GRANTEE", GRANTEE_MAX_CHAR_LENGTH, MYSQL_TYPE_STRING, 0, 0, nullptr, 0},
    {"TABLE_CATALOG", FN_REFLEN, MYSQL_TYPE_STRING, 0, 0, nullptr, 0},
    {"TABLE_SCHEMA", NAME_CHAR_LEN, MYSQL_TYPE_STRING, 0, 0, nullptr, 0},
    {"PRIVILEGE_TYPE", NAME_CHAR_LEN, MYSQL_TYPE_STRING, 0, 0, nullptr, 0},
    {"IS_GRANTABLE", 3, MYSQL_TYPE_STRING, 0, 0, nullptr, 0},
    {nullptr, 0, MYSQL_TYPE_STRING, 0, 0, nullptr, 0}}

schema_tables

ST_SCHEMA_TABLE schema_tables

Initial value:

= {
    {"COLUMN_PRIVILEGES", column_privileges_fields_info,
     fill_schema_column_privileges, nullptr, nullptr, false},
    {"ENGINES", engines_fields_info, fill_schema_engines, make_old_format,
     nullptr, false},
    {"OPEN_TABLES", open_tables_fields_info, fill_open_tables, make_old_format,
     nullptr, true},
    {"OPTIMIZER_TRACE", optimizer_trace_info, fill_optimizer_trace_info,
     nullptr, nullptr, false},
    {"PLUGINS", plugin_fields_info, fill_plugins, make_old_format, nullptr,
     false},
    {"PROCESSLIST", processlist_fields_info, fill_schema_processlist,
     make_old_format, nullptr, false},
    {"PROFILING", query_profile_statistics_info,
     fill_query_profile_statistics_info, make_profile_table_for_show, nullptr,
     false},
    {"SCHEMA_PRIVILEGES", schema_privileges_fields_info,
     fill_schema_schema_privileges, nullptr, nullptr, false},
    {"TABLE_PRIVILEGES", table_privileges_fields_info,
     fill_schema_table_privileges, nullptr, nullptr, false},
    {"USER_PRIVILEGES", user_privileges_fields_info,
     fill_schema_user_privileges, nullptr, nullptr, false},
    {"TMP_TABLE_COLUMNS", tmp_table_columns_fields_info, show_temporary_tables,
     make_tmp_table_columns_format, get_schema_tmp_table_columns_record, true},
    {"TMP_TABLE_KEYS", tmp_table_keys_fields_info, show_temporary_tables,
     make_old_format, get_schema_tmp_table_keys_record, true},
    {nullptr, nullptr, nullptr, nullptr, nullptr, false}}

status_var_array_version

ulonglong status_var_array_version = 0

status_vars_inited

bool status_vars_inited = false

sys_privileges

struct show_privileges_st sys_privileges[]

static

table_privileges_fields_info

ST_FIELD_INFO table_privileges_fields_info[]

Initial value:

= {
    {"GRANTEE", GRANTEE_MAX_CHAR_LENGTH, MYSQL_TYPE_STRING, 0, 0, nullptr, 0},
    {"TABLE_CATALOG", FN_REFLEN, MYSQL_TYPE_STRING, 0, 0, nullptr, 0},
    {"TABLE_SCHEMA", NAME_CHAR_LEN, MYSQL_TYPE_STRING, 0, 0, nullptr, 0},
    {"TABLE_NAME", NAME_CHAR_LEN, MYSQL_TYPE_STRING, 0, 0, nullptr, 0},
    {"PRIVILEGE_TYPE", NAME_CHAR_LEN, MYSQL_TYPE_STRING, 0, 0, nullptr, 0},
    {"IS_GRANTABLE", 3, MYSQL_TYPE_STRING, 0, 0, nullptr, 0},
    {nullptr, 0, MYSQL_TYPE_STRING, 0, 0, nullptr, 0}}

tmp_table_columns_fields_info

ST_FIELD_INFO tmp_table_columns_fields_info[]

Initial value:

= {
    {"COLUMN_NAME", NAME_CHAR_LEN, MYSQL_TYPE_STRING, 0, 0, "Field", 0},
    {"COLUMN_TYPE", 65535, MYSQL_TYPE_STRING, 0, 0, "Type", 0},
    {"COLLATION_NAME", MY_CS_NAME_SIZE, MYSQL_TYPE_STRING, 0, 1, "Collation",
     0},
    {"IS_NULLABLE", 3, MYSQL_TYPE_STRING, 0, 0, "Null", 0},
    {"COLUMN_KEY", 3, MYSQL_TYPE_STRING, 0, 0, "Key", 0},
    {"COLUMN_DEFAULT", MAX_FIELD_VARCHARLENGTH, MYSQL_TYPE_STRING, 0, 1,
     "Default", 0},
    {"EXTRA", 40, MYSQL_TYPE_STRING, 0, 0, "Extra", 0},
    {"PRIVILEGES", 80, MYSQL_TYPE_STRING, 0, 0, "Privileges", 0},
    {"COLUMN_COMMENT", COLUMN_COMMENT_MAXLEN, MYSQL_TYPE_STRING, 0, 0,
     "Comment", 0},
    {"GENERATION_EXPRESSION", GENERATED_COLUMN_EXPRESSION_MAXLEN,
     MYSQL_TYPE_STRING, 0, 0, "Generation expression", 0},
    {nullptr, 0, MYSQL_TYPE_STRING, 0, 0, nullptr, 0}}

tmp_table_keys_fields_info

ST_FIELD_INFO tmp_table_keys_fields_info[]

Initial value:

= {
    {"TABLE_NAME", NAME_CHAR_LEN, MYSQL_TYPE_STRING, 0, 0, "Table", 0},
    {"NON_UNIQUE", 1, MYSQL_TYPE_LONGLONG, 0, 0, "Non_unique", 0},
    {"INDEX_SCHEMA", NAME_CHAR_LEN, MYSQL_TYPE_STRING, 0, 0, nullptr, 0},
    {"INDEX_NAME", NAME_CHAR_LEN, MYSQL_TYPE_STRING, 0, 0, "Key_name", 0},
    {"SEQ_IN_INDEX", 2, MYSQL_TYPE_LONGLONG, 0, 0, "Seq_in_index", 0},
    {"COLUMN_NAME", NAME_CHAR_LEN, MYSQL_TYPE_STRING, 0, 1, "Column_name", 0},
    {"COLLATION", 1, MYSQL_TYPE_STRING, 0, 1, "Collation", 0},
    {"CARDINALITY", MY_INT64_NUM_DECIMAL_DIGITS, MYSQL_TYPE_LONGLONG, 0, 1,
     "Cardinality", 0},
    {"SUB_PART", 3, MYSQL_TYPE_LONGLONG, 0, 1, "Sub_part", 0},
    {"PACKED", 10, MYSQL_TYPE_STRING, 0, 1, "Packed", 0},
    {"NULLABLE", 3, MYSQL_TYPE_STRING, 0, 0, "Null", 0},
    {"INDEX_TYPE", 16, MYSQL_TYPE_STRING, 0, 0, "Index_type", 0},
    {"COMMENT", 16, MYSQL_TYPE_STRING, 0, 1, "Comment", 0},
    {"INDEX_COMMENT", INDEX_COMMENT_MAXLEN, MYSQL_TYPE_STRING, 0, 0,
     "Index_comment", 0},
    {"IS_VISIBLE", 4, MYSQL_TYPE_STRING, 0, 1, "Visible", 0},
    {"EXPRESSION", MAX_FIELD_BLOBLENGTH, MYSQL_TYPE_STRING, 0, 1, "Expression",
     0},
    {nullptr, 0, MYSQL_TYPE_STRING, 0, 0, nullptr, 0}}

user_privileges_fields_info

ST_FIELD_INFO user_privileges_fields_info[]

Initial value:

= {
    {"GRANTEE", GRANTEE_MAX_CHAR_LENGTH, MYSQL_TYPE_STRING, 0, 0, nullptr, 0},
    {"TABLE_CATALOG", FN_REFLEN, MYSQL_TYPE_STRING, 0, 0, nullptr, 0},
    {"PRIVILEGE_TYPE", NAME_CHAR_LEN, MYSQL_TYPE_STRING, 0, 0, nullptr, 0},
    {"IS_GRANTABLE", 3, MYSQL_TYPE_STRING, 0, 0, nullptr, 0},
    {nullptr, 0, MYSQL_TYPE_STRING, 0, 0, nullptr, 0}}