sql_plugin_var.cc File Reference

#include "sql/sql_plugin_var.h"
#include <limits.h>
#include <string>
#include <unordered_map>
#include <utility>
#include "map_helpers.h"
#include "my_dbug.h"
#include "my_list.h"
#include "mysql/psi/mysql_mutex.h"
#include "mysql/status_var.h"
#include "mysql/strings/dtoa.h"
#include "mysql/strings/int2str.h"
#include "mysql/strings/m_ctype.h"
#include "nulls.h"
#include "sql/current_thd.h"
#include "sql/item.h"
#include "sql/mysqld.h"
#include "sql/psi_memory_key.h"
#include "sql/set_var.h"
#include "sql/sql_class.h"
#include "sql/sql_const.h"
#include "sql/sql_plugin.h"
#include "sql/strfunc.h"
#include "sql/sys_vars_shared.h"
#include "sql/system_variables.h"
#include "sql_string.h"
#include "strxmov.h"
#include "template_utils.h"
#include "typelib.h"

Functions
bool	plugin_var_memalloc_global_update (THD *thd, SYS_VAR *var, char **dest, const char *value)
	Set value for global variable with PLUGIN_VAR_MEMALLOC flag. More...
bool	plugin_var_memalloc_session_update (THD *thd, SYS_VAR *var, char **dest, const char *value)
	Set value for thread local variable with PLUGIN_VAR_MEMALLOC flag. More...
SHOW_TYPE	pluginvar_show_type (SYS_VAR *plugin_var)
const void *	pluginvar_default_value (SYS_VAR *plugin_var)
uchar *	intern_sys_var_ptr (THD *thd, int offset, bool global_lock)
int	item_value_type (st_mysql_value *value)
const char *	item_val_str (st_mysql_value *value, char *buffer, int *length)
int	item_val_int (st_mysql_value *value, long long *buf)
int	item_is_unsigned (st_mysql_value *value)
int	item_val_real (st_mysql_value *value, double *buf)
int	check_func_bool (THD *, SYS_VAR *, void *save, st_mysql_value *value)
int	check_func_int (THD *thd, SYS_VAR *var, void *save, st_mysql_value *value)
int	check_func_long (THD *thd, SYS_VAR *var, void *save, st_mysql_value *value)
int	check_func_longlong (THD *thd, SYS_VAR *var, void *save, st_mysql_value *value)
int	check_func_str (THD *thd, SYS_VAR *, void *save, st_mysql_value *value)
int	check_func_enum (THD *, SYS_VAR *var, void *save, st_mysql_value *value)
int	check_func_set (THD *, SYS_VAR *var, void *save, st_mysql_value *value)
int	check_func_double (THD *thd, SYS_VAR *var, void *save, st_mysql_value *value)
void	update_func_bool (THD *, SYS_VAR *, void *tgt, const void *save)
void	update_func_int (THD *, SYS_VAR *, void *tgt, const void *save)
void	update_func_long (THD *, SYS_VAR *, void *tgt, const void *save)
void	update_func_longlong (THD *, SYS_VAR *, void *tgt, const void *save)
void	update_func_str (THD *, SYS_VAR *, void *tgt, const void *save)
void	update_func_double (THD *, SYS_VAR *, void *tgt, const void *save)
st_bookmark *	find_bookmark (const char *plugin, const char *name, int flags)
void	plugin_opt_set_limits (struct my_option *options, const SYS_VAR *opt)

Function Documentation

check_func_bool()

int check_func_bool	(	THD *	,
		SYS_VAR *	,
		void *	save,
		st_mysql_value *	value
	)

check_func_double()

int check_func_double	(	THD *	thd,
		SYS_VAR *	var,
		void *	save,
		st_mysql_value *	value
	)

check_func_enum()

int check_func_enum	(	THD *	,
		SYS_VAR *	var,
		void *	save,
		st_mysql_value *	value
	)

check_func_int()

int check_func_int	(	THD *	thd,
		SYS_VAR *	var,
		void *	save,
		st_mysql_value *	value
	)

check_func_long()

int check_func_long	(	THD *	thd,
		SYS_VAR *	var,
		void *	save,
		st_mysql_value *	value
	)

check_func_longlong()

int check_func_longlong	(	THD *	thd,
		SYS_VAR *	var,
		void *	save,
		st_mysql_value *	value
	)

check_func_set()

int check_func_set	(	THD *	,
		SYS_VAR *	var,
		void *	save,
		st_mysql_value *	value
	)

check_func_str()

int check_func_str	(	THD *	thd,
		SYS_VAR *	,
		void *	save,
		st_mysql_value *	value
	)

find_bookmark()

st_bookmark * find_bookmark	(	const char *	plugin,
		const char *	name,
		int	flags
	)

intern_sys_var_ptr()

uchar * intern_sys_var_ptr	(	THD *	thd,
		int	offset,
		bool	global_lock
	)

item_is_unsigned()

int item_is_unsigned

(

st_mysql_value *

value

)

item_val_int()

int item_val_int	(	st_mysql_value *	value,
		long long *	buf
	)

item_val_real()

int item_val_real	(	st_mysql_value *	value,
		double *	buf
	)

item_val_str()

const char * item_val_str	(	st_mysql_value *	value,
		char *	buffer,
		int *	length
	)

item_value_type()

int item_value_type

(

st_mysql_value *

value

)

plugin_opt_set_limits()

void plugin_opt_set_limits	(	struct my_option *	options,
		const SYS_VAR *	opt
	)

plugin_var_memalloc_global_update()

bool plugin_var_memalloc_global_update	(	THD *	thd,
		SYS_VAR *	var,
		char **	dest,
		const char *	value
	)

Set value for global variable with PLUGIN_VAR_MEMALLOC flag.

Parameters

[in]	thd	Thread context.
[in]	var	Plugin variable.
[in,out]	dest	Destination memory pointer.
[in]	value	'\0'-terminated new value.

Returns

Completion status

Return values

false	Success
true	Failure

plugin_var_memalloc_session_update()

bool plugin_var_memalloc_session_update	(	THD *	thd,
		SYS_VAR *	var,
		char **	dest,
		const char *	value
	)

Set value for thread local variable with PLUGIN_VAR_MEMALLOC flag.

Parameters

[in]	thd	Thread context.
[in]	var	Plugin variable.
[in,out]	dest	Destination memory pointer.
[in]	value	'\0'-terminated new value.

Most plugin variable values are stored on dynamic_variables_ptr. Releasing memory occupied by these values is as simple as freeing dynamic_variables_ptr.

An exception to the rule are PLUGIN_VAR_MEMALLOC variables, which are stored on individual memory hunks. All of these hunks has to be freed when it comes to cleanup.

It may happen that a plugin was uninstalled and descriptors of it's variables are lost. In this case it is impossible to locate corresponding values.

In addition to allocating and setting variable value, new element is added to dynamic_variables_allocs list. When thread is done, it has to call plugin_var_memalloc_free() to release memory used by PLUGIN_VAR_MEMALLOC variables.

If var is NULL, variable update function is not called. This is needed when we take snapshot of system variables during thread initialization.

Note

List element and variable value are stored on the same memory hunk. List element is followed by variable value.

Returns

Completion status

Return values

false	Success
true	Failure

pluginvar_default_value()

const void * pluginvar_default_value

(

SYS_VAR *

plugin_var

)

pluginvar_show_type()

SHOW_TYPE pluginvar_show_type

(

SYS_VAR *

plugin_var

)

update_func_bool()

void update_func_bool	(	THD *	,
		SYS_VAR *	,
		void *	tgt,
		const void *	save
	)

update_func_double()

void update_func_double	(	THD *	,
		SYS_VAR *	,
		void *	tgt,
		const void *	save
	)

update_func_int()

void update_func_int	(	THD *	,
		SYS_VAR *	,
		void *	tgt,
		const void *	save
	)

update_func_long()

void update_func_long	(	THD *	,
		SYS_VAR *	,
		void *	tgt,
		const void *	save
	)

update_func_longlong()

void update_func_longlong	(	THD *	,
		SYS_VAR *	,
		void *	tgt,
		const void *	save
	)

update_func_str()

void update_func_str	(	THD *	,
		SYS_VAR *	,
		void *	tgt,
		const void *	save
	)