Inheritance diagram for subselect_union_engine:

Public Member Functions
	subselect_union_engine (st_select_lex_unit u, select_result_interceptor result, Item_subselect *item)
virtual void	cleanup ()
virtual bool	prepare ()
virtual void	fix_length_and_dec (Item_cache **row)
virtual bool	exec ()
virtual uint	cols () const
virtual uint8	uncacheable () const
virtual void	exclude ()
virtual table_map	upper_select_const_tables () const
virtual void	print (String *str, enum_query_type query_type)
virtual bool	change_result (Item_subselect si, select_result_interceptor result)
virtual bool	no_tables () const
virtual bool	is_executed () const
virtual enum_engine_type	engine_type () const

Member Function Documentation

bool subselect_union_engine::change_result	(	Item_subselect *	si,
		select_result_interceptor *	res
	)		`[virtual]`

change select_result object of engine.

Parameters:

si	new subselect Item
res	new select_result object

Return values:

FALSE	OK
TRUE	error

void subselect_union_engine::cleanup ( ) [virtual]

Cleanup engine after complete query execution, free all resources.

bool subselect_union_engine::no_tables ( ) const [virtual]

Report about presence of tables in subquery.

Return values:

TRUE	there are not tables used in subquery
FALSE	there are some tables in subquery

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

Public Member Functions