diff options
Diffstat (limited to 'sql/item_subselect.h')
| -rw-r--r-- | sql/item_subselect.h | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/sql/item_subselect.h b/sql/item_subselect.h index 9116238c640..130f90839e3 100644 --- a/sql/item_subselect.h +++ b/sql/item_subselect.h @@ -48,7 +48,11 @@ class Cached_item; class Item_subselect :public Item_result_field, protected Used_tables_and_const_cache { - bool value_assigned; /* value already assigned to subselect */ + /* + Set to TRUE if the value is assigned for the subselect + FALSE: subquery not executed or the subquery returns an empty result + */ + bool value_assigned; bool own_engine; /* the engine was not taken from other Item_subselect */ protected: /* thread handler, will be assigned in fix_fields only */ |