Sys_var_charptr_func Class Reference

#include <sys_vars.h>

Inheritance diagram for Sys_var_charptr_func:

List of all members.

Public Member Functions
	Sys_var_charptr_func (const char *name_arg, const char *comment, flag_enum flag_arg)
bool	session_update (THD *thd, set_var *var)
bool	global_update (THD *thd, set_var *var)
void	session_save_default (THD *thd, set_var *var)
void	global_save_default (THD *thd, set_var *var)
bool	do_check (THD *thd, set_var *var)
bool	check_update_type (Item_result type)
virtual uchar *	session_value_ptr (THD *thd, LEX_STRING *base)
virtual uchar *	global_value_ptr (THD *thd, LEX_STRING *base)

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Detailed Description

Abstract base class for read-only variables (global or session) of string type where the value is generated by some function. This needs to be subclassed; the session_value_ptr or global_value_ptr function should be overridden.

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Member Function Documentation

void Sys_var_charptr_func::global_save_default	(	THD *	thd,
		set_var *	var
	)		[inline, virtual]

save the global default value of the variable in var

Implements sys_var.

void Sys_var_charptr_func::session_save_default	(	THD *	thd,
		set_var *	var
	)		[inline, virtual]

save the session default value of the variable in var

Implements sys_var.

virtual uchar* Sys_var_charptr_func::session_value_ptr	(	THD *	thd,
		LEX_STRING *	base
	)		[inline, virtual]

A pointer to a value of the variable for SHOW. It must be of show_val_type type (bool for SHOW_BOOL, int for SHOW_INT, longlong for SHOW_LONGLONG, etc).

Reimplemented from sys_var.

Reimplemented in Sys_var_gtid_owned, and Sys_var_gtid_executed.

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

• sys_vars.h