sys_vars_shared.h File Reference

#include <sql_priv.h>
#include "set_var.h"

Go to the source code of this file.

Classes
class	PolyLock
class	PolyLock_mutex
class	PolyLock_rwlock
class	AutoWLock
class	AutoRLock
Functions
bool	throw_bounds_warning (THD *thd, const char *name, bool fixed, bool is_unsigned, longlong v)
bool	throw_bounds_warning (THD *thd, const char *name, bool fixed, double v)
sys_var *	intern_find_sys_var (const char *str, uint length)
Variables
sys_var_chain	all_sys_vars

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Detailed Description

"protected" interface to sys_var - server configuration variables.

This header is included by files implementing support and utility functions of sys_var's (set_var.cc) and files implementing classes in the sys_var hierarchy (sql_plugin.cc)

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Function Documentation

sys_var* intern_find_sys_var	(	const char *	str,
		uint	length
	)

Find a user set-table variable.

Parameters:

str	Name of system variable to find
length	Length of variable. zero means that we should use strlen() on the variable

Return values:

pointer	pointer to variable definitions
0	Unknown variable (error message is given)

bool throw_bounds_warning	(	THD *	thd,
		const char *	name,
		bool	fixed,
		bool	is_unsigned,
		longlong	v
	)

Throw warning (error in STRICT mode) if value for variable needed bounding. Plug-in interface also uses this.

Parameters:

thd	thread handle
name	variable's name
fixed	did we have to correct the value? (throw warn/err if so)
is_unsigned	is value's type unsigned?
v	variable's value

Return values:

true	on error, false otherwise (warning or ok)