Sys_var_charptr Class Reference

#include <sys_vars.h>

Inheritance diagram for Sys_var_charptr:

List of all members.

Public Member Functions
	Sys_var_charptr (const char *name_arg, const char *comment, int flag_args, ptrdiff_t off, size_t size, CMD_LINE getopt, enum charset_enum is_os_charset_arg, const char *def_val, PolyLock *lock=0, enum binlog_status_enum binlog_status_arg=VARIABLE_NOT_IN_BINLOG, on_check_function on_check_func=0, on_update_function on_update_func=0, const char *substitute=0, int parse_flag=PARSE_NORMAL)
void	cleanup ()
bool	do_check (THD *thd, set_var *var)
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	check_update_type (Item_result type)

---

Detailed Description

The class for string variables. The string can be in character_set_filesystem or in character_set_system. The string can be allocated with my_malloc() or not. The state of the initial value is specified in the constructor, after that it's managed automatically. The value of NULL is supported.

Class specific constructor arguments: enum charset_enum is_os_charset_arg

Backing store: char*

Note:

This class supports only GLOBAL variables, because THD on destruction does not destroy individual members of SV, there's no way to free allocated string variables for every thread.

---

Member Function Documentation

void Sys_var_charptr::cleanup

(

)

[inline, virtual]

All the cleanup procedures should be performed here

Reimplemented from sys_var.

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

save the session default value of the variable in var

Implements sys_var.

---

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

• sys_vars.h