Inheritance diagram for subselect_engine:

Public Types
enum	enum_engine_type { ABSTRACT_ENGINE, SINGLE_SELECT_ENGINE, UNION_ENGINE, UNIQUESUBQUERY_ENGINE, INDEXSUBQUERY_ENGINE, HASH_SJ_ENGINE }
Public Member Functions
	subselect_engine (Item_subselect si, select_result_interceptor res)
virtual void	cleanup ()=0
void	set_thd_for_result ()
	Sets "thd" for 'result'. Should be called before prepare()
virtual bool	prepare ()=0
virtual void	fix_length_and_dec (Item_cache **row)=0
virtual bool	exec ()=0
virtual uint	cols () const =0
virtual uint8	uncacheable () const =0
virtual enum Item_result	type () const
virtual enum_field_types	field_type () const
virtual void	exclude ()=0
virtual bool	may_be_null () const
virtual table_map	upper_select_const_tables () const =0
virtual void	print (String *str, enum_query_type query_type)=0
virtual bool	change_result (Item_subselect si, select_result_interceptor result)=0
virtual bool	no_tables () const =0
virtual bool	is_executed () const
virtual enum_engine_type	engine_type () const
const Item_subselect *	get_item () const
Static Public Member Functions
static table_map	calc_const_tables (TABLE_LIST *)
Protected Member Functions
void	set_row (List< Item > &item_list, Item_cache **row)
Protected Attributes
select_result_interceptor *	result
Item_subselect *	item
enum Item_result	res_type
enum_field_types	res_field_type
bool	maybe_null

Member Function Documentation

virtual void subselect_engine::cleanup ( ) [pure virtual]

Cleanup engine after complete query execution, free all resources.

const Item_subselect* subselect_engine::get_item ( ) const [inline]

Returns:: the internal Item. Defined only in debug builds, because should be used only for debug asserts.

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

Public Types