Item_is_not_null_test Class Reference

Inheritance diagram for Item_is_not_null_test:

List of all members.

Public Member Functions
	Item_is_not_null_test (Item_in_subselect *ow, Item *a)
enum Functype	functype () const
longlong	val_int ()
const char *	func_name () const
void	update_used_tables ()
table_map	get_initial_pseudo_tables () const

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Member Function Documentation

table_map Item_is_not_null_test::get_initial_pseudo_tables

(

)

const [inline, virtual]

We add RAND_TABLE_BIT to prevent moving this item from HAVING to WHERE.

Return values:

Always

RAND_TABLE_BIT

Reimplemented from Item_func.

void Item_is_not_null_test::update_used_tables

(

)

[virtual]

Optimize case of not_null_column IS NULL.

Reimplemented from Item_func_isnull.

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

• item_cmpfunc.h
• item_cmpfunc.cc