diff options
Diffstat (limited to 'sql/item_cmpfunc.h')
| -rw-r--r-- | sql/item_cmpfunc.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/sql/item_cmpfunc.h b/sql/item_cmpfunc.h index bea8250de9d..525f269e528 100644 --- a/sql/item_cmpfunc.h +++ b/sql/item_cmpfunc.h @@ -769,6 +769,12 @@ class Item_func_in :public Item_int_func bool nulls_in_row(); bool is_bool_func() { return 1; } CHARSET_INFO *compare_collation() { return cmp_collation.collation; } + /* + IN() protect from NULL only first argument, if construction like + "expression IN ()" will be allowed, we will need to check number of + argument here, because "NOT(NULL IN ())" is TRUE. + */ + table_map not_null_tables() const { return args[0]->not_null_tables(); } }; /* Functions used by where clause */ |