diff options
Diffstat (limited to 'sql/item_cmpfunc.h')
| -rw-r--r-- | sql/item_cmpfunc.h | 21 |
1 files changed, 19 insertions, 2 deletions
diff --git a/sql/item_cmpfunc.h b/sql/item_cmpfunc.h index e7670755396..5e246e3e285 100644 --- a/sql/item_cmpfunc.h +++ b/sql/item_cmpfunc.h @@ -648,6 +648,7 @@ class Item_func_in :public Item_int_func class Item_func_isnull :public Item_bool_func { +protected: longlong cached_value; public: Item_func_isnull(Item *a) :Item_bool_func(a) {} @@ -656,11 +657,11 @@ public: void fix_length_and_dec() { decimals=0; max_length=1; maybe_null=0; - Item_func_isnull::update_used_tables(); + update_used_tables(); } const char *func_name() const { return "isnull"; } /* Optimize case of not_null_column IS NULL */ - void update_used_tables() + virtual void update_used_tables() { if (!args[0]->maybe_null) { @@ -680,6 +681,22 @@ public: optimize_type select_optimize() const { return OPTIMIZE_NULL; } }; +/* Functions used by HAVING for rewriting IN subquery */ + +class Item_in_subselect; +class Item_is_not_null_test :public Item_func_isnull +{ + Item_in_subselect* owner; +public: + Item_is_not_null_test(Item_in_subselect* ow, Item *a) + :Item_func_isnull(a), owner(ow) + {} + longlong val_int(); + const char *func_name() const { return "is_not_null_test"; } + void update_used_tables(); +}; + + class Item_func_isnotnull :public Item_bool_func { public: |