diff options
Diffstat (limited to 'sql/item_subselect.h')
| -rw-r--r-- | sql/item_subselect.h | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/sql/item_subselect.h b/sql/item_subselect.h index 69ac78d859b..a125a119ad8 100644 --- a/sql/item_subselect.h +++ b/sql/item_subselect.h @@ -125,6 +125,12 @@ public: virtual void reset_value_registration() {} enum_parsing_place place() { return parsing_place; } + /** + Get the SELECT_LEX structure associated with this Item. + @return the SELECT_LEX structure associated with this Item + */ + st_select_lex* get_select_lex(); + friend class select_subselect; friend class Item_in_optimizer; friend bool Item_field::fix_fields(THD *, Item **); @@ -168,6 +174,16 @@ public: bool null_inside(); void bring_value(); + /** + This method is used to implement a special case of semantic tree + rewriting, mandated by a SQL:2003 exception in the specification. + The only caller of this method is handle_sql2003_note184_exception(), + see the code there for more details. + Do not call this method for other purposes. + @return the SELECT_LEX structure that was given in the constructor. + */ + st_select_lex* invalidate_and_restore_select_lex(); + friend class select_singlerow_subselect; }; |