MySQL 9.0.0
Source Code Documentation
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System variable cache. More...
#include <pfs_variable.h>
Public Member Functions | |
PFS_system_variable_cache (bool external_init) | |
bool | match_scope (int scope) |
Match system variable scope to desired scope. More... | |
ulonglong | get_sysvar_hash_version () |
~PFS_system_variable_cache () override | |
Public Member Functions inherited from PFS_variable_cache< System_variable > | |
PFS_variable_cache (bool external_init) | |
virtual | ~PFS_variable_cache ()=0 |
Destructor. More... | |
bool | initialize_session () |
Build array of SHOW_VARs from the external variable source. More... | |
bool | initialize_client_session () |
Build array of SHOW_VARs suitable for aggregation by user, host or account. More... | |
int | materialize_global () |
Build cache of GLOBAL system or status variables. More... | |
int | materialize_all (THD *thd) |
Build cache of GLOBAL and SESSION variables for a non-instrumented thread. More... | |
int | materialize_session (THD *thd) |
Build cache of SESSION variables for a non-instrumented thread. More... | |
int | materialize_session (PFS_thread *pfs_thread, bool use_mem_root=false) |
Build cache of SESSION variables for an instrumented thread. More... | |
int | materialize_session (PFS_thread *pfs_thread, uint index) |
Cache a single SESSION variable for an instrumented thread. More... | |
int | materialize_user (PFS_user *pfs_user) |
Build cache of SESSION status variables for a user. More... | |
int | materialize_host (PFS_host *pfs_host) |
Build cache of SESSION status variables for a host. More... | |
int | materialize_account (PFS_account *pfs_account) |
Build cache of SESSION status variables for an account. More... | |
bool | is_materialized () |
True if variables have been materialized. More... | |
bool | is_materialized (THD *unsafe_thd) |
True if variables have been materialized for given THD. More... | |
bool | is_materialized (PFS_thread *pfs_thread) |
True if variables have been materialized for given PFS_thread. More... | |
bool | is_materialized (PFS_user *pfs_user) |
True if variables have been materialized for given PFS_user. More... | |
bool | is_materialized (PFS_host *pfs_host) |
True if variables have been materialized for given PFS_host. More... | |
bool | is_materialized (PFS_account *pfs_account) |
True if variables have been materialized for given PFS_account. More... | |
bool | is_materialized (PFS_client *pfs_client) |
True if variables have been materialized for given PFS_user/host/account. More... | |
THD_ptr | get_THD (THD *thd) |
Get a validated THD from the thread manager. More... | |
THD_ptr | get_THD (PFS_thread *pfs_thread) |
const System_variable * | get (uint index=0) const |
Get a single variable from the cache. More... | |
uint | size () |
Number of elements in the cache. More... | |
Protected Member Functions | |
bool | init_show_var_array (enum_var_type scope, bool strict) |
Build a sorted list of all system variables from the system variable hash. More... | |
int | do_materialize_all (THD *thd) override |
Build a GLOBAL and SESSION system variable cache. More... | |
Private Member Functions | |
bool | do_initialize_session () override |
Build an array of SHOW_VARs from the system variable hash. More... | |
int | do_materialize_global () override |
Build a GLOBAL system variable cache. More... | |
int | do_materialize_session (THD *thd) override |
Build a SESSION system variable cache for a THD. More... | |
int | do_materialize_session (PFS_thread *thread) override |
Build a SESSION system variable cache for a pfs_thread. More... | |
int | do_materialize_session (PFS_thread *pfs_thread, uint index) override |
Materialize a single system variable for a pfs_thread. More... | |
void | set_mem_root () |
Allocate and assign mem_root for system variable materialization. More... | |
void | clear_mem_root () |
Mark memory blocks in the temporary mem_root as free. More... | |
void | free_mem_root () |
Free the temporary mem_root. More... | |
Private Attributes | |
MEM_ROOT | m_mem_sysvar |
MEM_ROOT ** | m_mem_thd |
MEM_ROOT * | m_mem_thd_save |
MEM_ROOT * | m_mem_sysvar_ptr |
Additional Inherited Members | |
Public Types inherited from PFS_variable_cache< System_variable > | |
typedef Prealloced_array< System_variable, SYSTEM_VARIABLE_PREALLOC > | Variable_array |
Protected Attributes inherited from PFS_variable_cache< System_variable > | |
THD * | m_safe_thd |
THD * | m_unsafe_thd |
THD * | m_current_thd |
PFS_thread * | m_pfs_thread |
PFS_client * | m_pfs_client |
Find_THD_variable | m_thd_finder |
Variable_array | m_cache |
bool | m_initialized |
bool | m_external_init |
bool | m_materialized |
Show_var_array | m_show_var_array |
System_variable_tracker::Array | m_sys_var_tracker_array |
ulonglong | m_version |
enum_var_type | m_query_scope |
bool | m_use_mem_root |
bool | m_aggregate |
System variable cache.
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explicit |
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inlineoverride |
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private |
Mark memory blocks in the temporary mem_root as free.
Restore THD::mem_root.
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overrideprivatevirtual |
Build an array of SHOW_VARs from the system variable hash.
Filter for SESSION scope.
Reimplemented from PFS_variable_cache< System_variable >.
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overrideprotectedvirtual |
Build a GLOBAL and SESSION system variable cache.
Reimplemented from PFS_variable_cache< System_variable >.
Reimplemented in PFS_system_variable_info_cache, and PFS_system_persisted_variables_cache.
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overrideprivatevirtual |
Build a GLOBAL system variable cache.
Reimplemented from PFS_variable_cache< System_variable >.
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overrideprivatevirtual |
Materialize a single system variable for a pfs_thread.
Requires that init_show_var_array() has already been called. Return 0 for success.
Reimplemented from PFS_variable_cache< System_variable >.
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overrideprivatevirtual |
Build a SESSION system variable cache for a pfs_thread.
Requires that init_show_var_array() has already been called. Return 0 for success.
Reimplemented from PFS_variable_cache< System_variable >.
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overrideprivatevirtual |
Build a SESSION system variable cache for a THD.
Reimplemented from PFS_variable_cache< System_variable >.
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private |
Free the temporary mem_root.
Restore THD::mem_root if necessary.
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inline |
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protected |
Build a sorted list of all system variables from the system variable hash.
Filter by scope. Must be called inside of LOCK_plugin_delete.
bool PFS_system_variable_cache::match_scope | ( | int | scope | ) |
Match system variable scope to desired scope.
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private |
Allocate and assign mem_root for system variable materialization.
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private |
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private |
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private |
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