Public Types | |
enum | enum_engine_type { ABSTRACT_ENGINE, SINGLE_SELECT_ENGINE, UNION_ENGINE, UNIQUESUBQUERY_ENGINE, INDEXSUBQUERY_ENGINE, HASH_SJ_ENGINE } |
Public Member Functions | |
subselect_union_engine (Select_Lex_Unit *u, select_result_interceptor *result, Item_subselect *item) | |
void | cleanup () |
int | prepare () |
void | fix_length_and_dec (Item_cache **row) |
int | exec () |
uint32_t | cols () |
bool | uncacheable () |
bool | uncacheable (uint32_t bit_pos) |
void | exclude () |
table_map | upper_select_const_tables () |
virtual void | print (String *str) |
bool | change_result (Item_subselect *si, select_result_interceptor *result) |
bool | no_tables () |
bool | is_executed () const |
bool | no_rows () |
virtual enum_engine_type | engine_type () |
void | set_session (Session *session_arg) |
Session * | get_session () |
enum Item_result | type () |
enum_field_types | field_type () |
virtual bool | may_be_null () |
Static Public Member Functions | |
static table_map | calc_const_tables (TableList *) |
static void * | operator new (size_t size) |
static void * | operator new (size_t size, Root *mem_root) |
static void * | operator new[] (size_t size) |
static void * | operator new[] (size_t size, Root *mem_root) |
static void | operator delete (void *, size_t) |
static void | operator delete (void *, Root *) |
static void | operator delete[] (void *, Root *) |
static void | operator delete[] (void *, size_t) |
Protected Member Functions | |
void | set_row (List< Item > &item_list, Item_cache **row) |
Protected Attributes | |
select_result_interceptor * | result |
Session * | session |
Item_subselect * | item |
enum Item_result | res_type |
enum_field_types | res_field_type |
bool | maybe_null |
Private Attributes | |
Select_Lex_Unit * | unit |
Definition at line 520 of file subselect.h.
bool drizzled::subselect_union_engine::change_result | ( | Item_subselect * | si, |
select_result_interceptor * | res | ||
) | [virtual] |
change select_result object of engine.
si | new subselect Item |
res | new select_result object |
false | OK |
true | error |
Implements drizzled::subselect_engine.
Definition at line 2891 of file subselect.cc.
bool drizzled::subselect_union_engine::no_tables | ( | ) | [virtual] |
Report about presence of tables in subquery.
true | there are not tables used in subquery |
false | there are some tables in subquery |
Implements drizzled::subselect_engine.
Definition at line 2959 of file subselect.cc.