set_var_base Class Reference

A base class for everything that can be set with SET command. More...

#include <set_var.h>

Inheritance diagram for set_var_base:

Public Member Functions
	set_var_base ()=default
virtual	~set_var_base ()=default
virtual int	resolve (THD *thd)=0
	Check privileges & fix_fields. More...
virtual int	check (THD *thd)=0
	Evaluate the expression. More...
virtual int	update (THD *thd)=0
	Set the value. More...
virtual bool	print (const THD *thd, String *str)=0
	To self-print. More...
virtual bool	is_var_optimizer_trace () const
virtual void	cleanup ()
virtual int	light_check (THD *thd)
	Used only by prepared statements to resolve and check. More...
virtual bool	is_sensitive () const
	Used to identify if variable is sensitive or not. More...

Detailed Description

A base class for everything that can be set with SET command.

It's similar to Items, an instance of this is created by the parser for every assignment in SET (or elsewhere, e.g. in SELECT).

Constructor & Destructor Documentation

set_var_base()

set_var_base::set_var_base ( )

default

~set_var_base()

virtual set_var_base::~set_var_base ( )

virtualdefault

Member Function Documentation

check()

virtual int set_var_base::check ( THD *  thd )

pure virtual

Evaluate the expression.

Implemented in set_var, set_var_user, set_var_password, and set_var_collation_client.

cleanup()

virtual void set_var_base::cleanup ( )

inlinevirtual

is_sensitive()

virtual bool set_var_base::is_sensitive ( ) const

inlinevirtual

Used to identify if variable is sensitive or not.

Reimplemented in set_var.

is_var_optimizer_trace()

virtual bool set_var_base::is_var_optimizer_trace ( ) const

inlinevirtual

Returns

whether this variable is @@optimizer_trace.

Reimplemented in set_var.

light_check()

virtual int set_var_base::light_check ( THD *  thd )

inlinevirtual

Used only by prepared statements to resolve and check.

No locking of tables between the two phases.

Reimplemented in set_var, and set_var_user.

print()

virtual bool set_var_base::print ( const THD *  thd, String *  str  )

pure virtual

To self-print.

Implemented in set_var, set_var_user, set_var_password, and set_var_collation_client.

resolve()

virtual int set_var_base::resolve ( THD *  thd )

pure virtual

Check privileges & fix_fields.

Implemented in set_var_password, set_var_collation_client, set_var, and set_var_user.

update()

virtual int set_var_base::update ( THD *  thd )

pure virtual

Set the value.

Implemented in set_var, set_var_user, set_var_password, and set_var_collation_client.

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

• sql/set_var.h