Storage for backup of Open_tables_state. More...

#include <sql_class.h>

Inheritance diagram for Open_tables_backup:

Public Attributes
MDL_savepoint	mdl_system_tables_svp
	When we backup the open tables state to open a system table or tables, we want to save state of metadata locks which were acquired before the backup. More...

Public Attributes inherited from Open_tables_state
TABLE *	open_tables
	List of regular tables in use by this thread. More...

TABLE *	temporary_tables
	List of temporary tables used by this thread. More...

MYSQL_LOCK *	lock

MYSQL_LOCK *	extra_lock

enum enum_locked_tables_mode	locked_tables_mode

uint	state_flags

Additional Inherited Members
Public Types inherited from Open_tables_state
enum	enum_flags { BACKUPS_AVAIL = (1U << 0) , SYSTEM_TABLES = (1U << 1) }

Public Member Functions inherited from Open_tables_state
Reprepare_observer *	get_reprepare_observer () const

void	push_reprepare_observer (Reprepare_observer *o)

Reprepare_observer *	pop_reprepare_observer ()

void	reset_reprepare_observers ()

	Open_tables_state ()
	This constructor initializes Open_tables_state instance which can only be used as backup storage. More...

void	set_open_tables_state (Open_tables_state *state)

void	reset_open_tables_state ()

Detailed Description

Storage for backup of Open_tables_state.

Must be used only to open system tables (TABLE_CATEGORY_SYSTEM and TABLE_CATEGORY_LOG).

Member Data Documentation

MDL_savepoint Open_tables_backup::mdl_system_tables_svp

When we backup the open tables state to open a system table or tables, we want to save state of metadata locks which were acquired before the backup.

It is used to release metadata locks on system tables after they are no longer used.

The documentation for this class was generated from the following file: