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| author | Chaithra Gopalareddy <chaithra.gopalareddy@oracle.com> | 2012-02-24 11:53:36 +0530 |
|---|---|---|
| committer | Chaithra Gopalareddy <chaithra.gopalareddy@oracle.com> | 2012-02-24 11:53:36 +0530 |
| commit | df8827d0e6ed8f4a8640640a0bc0f407985d31fa (patch) | |
| tree | 25f99dbc3f7dafb2ae5ba25a62472d258073829f /mysql-test/r | |
| parent | a66f29c30c500cdbea82f6acc771bef0aa36328d (diff) | |
| download | mariadb-git-df8827d0e6ed8f4a8640640a0bc0f407985d31fa.tar.gz | |
Bug#13012483:EXPLAIN EXTENDED, PREPARED STATEMENT, CRASH IN
CHECK_SIMPLE_EQUALITY
PROBLEM:
Crash in "check_simple_equality" when using a subquery with "IN" and
"ALL" in prepare.
ANALYSIS:
Crash can be reproduced using a simplified query like this one:
prepare s from "select 1 from g1 where 1 < all (
select @:=(1 in (select 1 from g1)) from g1)";
This bug is currently present only on 5.5.and 5.1. Its fixed as part
of work log(#1110) in 5.6. We are taking one change to fix this
in 5.5 and 5.1.
Problem seems to be present because we are trying to evaluate "is_null"
on an argument which is part of a subquery
(In Item_is_not_null_test::update_used_tables()).
But the condition to evaluate is only when we do not have a sub query
present, which means to say that "with_subselect" is not set.
With respect to the above query, we create an object of type
"Item_in_optimizer" which by definition is always associated with a
subquery. While in 5.6 we set "with_subselect" to true for
"Item_in_optimizer" object, we do not do the same in 5.5. This results in
the evaluation for "is_null" resulting in a coredump.
So, we are now setting "with_subselect" to true for "Item_in_optimizer"
in 5.1 and 5.5.
Diffstat (limited to 'mysql-test/r')
| -rw-r--r-- | mysql-test/r/func_in.result | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/mysql-test/r/func_in.result b/mysql-test/r/func_in.result index 0b6117581f3..7f0e607e789 100644 --- a/mysql-test/r/func_in.result +++ b/mysql-test/r/func_in.result @@ -776,4 +776,14 @@ SELECT 1 IN (YEAR(FROM_UNIXTIME(NULL)) ,1); 1 IN (YEAR(FROM_UNIXTIME(NULL)) ,1) 1 # +# +# Bug#13012483: EXPLAIN EXTENDED, PREPARED STATEMENT, CRASH IN CHECK_SIMPLE_EQUALITY +# +CREATE TABLE t1 (a INT); +PREPARE s FROM "SELECT 1 FROM t1 WHERE 1 < ALL (SELECT @:= (1 IN (SELECT 1 FROM t1)) FROM t1)"; +EXECUTE s; +1 +DROP TABLE t1; +# End of test BUG#13012483 +# End of 5.1 tests |