diff options
Diffstat (limited to 'sql/item.h')
| -rw-r--r-- | sql/item.h | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/sql/item.h b/sql/item.h index 865f9cf0886..ec98ed44229 100644 --- a/sql/item.h +++ b/sql/item.h @@ -870,6 +870,7 @@ public: set value of aggregate function in case of no rows for grouping were found */ virtual void no_rows_in_result() {} + virtual void restore_to_before_no_rows_in_result() {} virtual Item *copy_or_same(THD *thd) { return this; } virtual Item *copy_andor_structure(THD *thd) { return this; } virtual Item *real_item() { return this; } @@ -926,6 +927,21 @@ public: virtual bool register_field_in_read_map(uchar *arg) { return 0; } virtual bool enumerate_field_refs_processor(uchar *arg) { return 0; } virtual bool mark_as_eliminated_processor(uchar *arg) { return 0; } + + /* To call bool function for all arguments */ + struct bool_func_call_args + { + Item *original_func_item; + void (Item::*bool_function)(); + }; + bool call_bool_func_processor(uchar *org_item) + { + bool_func_call_args *info= (bool_func_call_args*) org_item; + /* Avoid recursion, as walk also calls for original item */ + if (info->original_func_item != this) + (this->*(info->bool_function))(); + return FALSE; + } /* The next function differs from the previous one that a bitmap to be updated is passed as uchar *arg. @@ -2404,6 +2420,14 @@ public: return (*ref)->walk(processor, walk_subquery, arg) || (this->*processor)(arg); } + void no_rows_in_result() + { + (*ref)->no_rows_in_result(); + } + void restore_to_before_no_rows_in_result() + { + (*ref)->restore_to_before_no_rows_in_result(); + } virtual void print(String *str, enum_query_type query_type); bool result_as_longlong() { |