diff options
Diffstat (limited to 'sql/item_cmpfunc.cc')
| -rw-r--r-- | sql/item_cmpfunc.cc | 11 |
1 files changed, 5 insertions, 6 deletions
diff --git a/sql/item_cmpfunc.cc b/sql/item_cmpfunc.cc index 29fa049b6c4..936ae04e93d 100644 --- a/sql/item_cmpfunc.cc +++ b/sql/item_cmpfunc.cc @@ -1,9 +1,8 @@ -/* Copyright (C) 2000-2003 MySQL AB & MySQL Finland AB & TCX DataKonsult AB +/* Copyright (C) 2000-2006 MySQL AB This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2 of the License, or - (at your option) any later version. + the Free Software Foundation; version 2 of the License. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of @@ -2990,7 +2989,7 @@ longlong Item_func_isnull::val_int() Handle optimization if the argument can't be null This has to be here because of the test in update_used_tables(). */ - if (!used_tables_cache) + if (!used_tables_cache && !with_subselect) return cached_value; return args[0]->is_null() ? 1: 0; } @@ -2999,7 +2998,7 @@ longlong Item_is_not_null_test::val_int() { DBUG_ASSERT(fixed == 1); DBUG_ENTER("Item_is_not_null_test::val_int"); - if (!used_tables_cache) + if (!used_tables_cache && !with_subselect) { owner->was_null|= (!cached_value); DBUG_PRINT("info", ("cached :%ld", (long) cached_value)); @@ -3026,7 +3025,7 @@ void Item_is_not_null_test::update_used_tables() else { args[0]->update_used_tables(); - if (!(used_tables_cache=args[0]->used_tables())) + if (!(used_tables_cache=args[0]->used_tables()) && !with_subselect) { /* Remember if the value is always NULL or never NULL */ cached_value= (longlong) !args[0]->is_null(); |