diff options
Diffstat (limited to 'sql/item_subselect.h')
| -rw-r--r-- | sql/item_subselect.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/sql/item_subselect.h b/sql/item_subselect.h index 5b2ab419b77..69ac78d859b 100644 --- a/sql/item_subselect.h +++ b/sql/item_subselect.h @@ -362,7 +362,7 @@ public: enum Item_result type() { return res_type; } enum_field_types field_type() { return res_field_type; } virtual void exclude()= 0; - bool may_be_null() { return maybe_null; }; + virtual bool may_be_null() { return maybe_null; }; virtual table_map upper_select_const_tables()= 0; static table_map calc_const_tables(TABLE_LIST *); virtual void print(String *str)= 0; @@ -399,6 +399,7 @@ public: void print (String *str); bool change_result(Item_subselect *si, select_subselect *result); bool no_tables(); + bool may_be_null(); bool is_executed() const { return executed; } bool no_rows(); }; |