database/mariadb
1
0
Fork 0
mirror of https://github.com/MariaDB/server.git synced 2025-07-30 16:24:05 +03:00
Code Activity

Bug#11765713 58705: OPTIMIZER LET ENGINE DEPEND ON UNINITIALIZED VALUES CREATED BY OPT_SUM_QU

Browse Source 
Valgrind warnings were caused by comparing index values to an un-initialized field.


mysql-test/r/subselect.result:
  New test cases.
mysql-test/t/subselect.test:
  New test cases.
sql/opt_sum.cc:
  Add thd to opt_sum_query enabling it to test for errors.
  If we have a non-nullable index, we cannot use it to match null values,
  since set_null() will be ignored, and we might compare uninitialized data.
sql/sql_select.cc:
  Add thd to opt_sum_query, enabling it to test for errors.
sql/sql_select.h:
  Add thd to opt_sum_query, enabling it to test for errors.
This commit is contained in:
Tor Didriksen
2011-04-14 16:35:24 +02:00
parent 7634e724e7
commit dd3d9477b2
5 changed files with 74 additions and 14 deletions
Download Patch File Download Diff File Expand all files Collapse all files

22
mysql-test/t/subselect.test
View File

@ -3726,3 +3726,25 @@ DROP TABLE t1,t2;
--enable_result_log
--echo End of 5.1 tests
--echo #
--echo # Bug #11765713 58705:
--echo # OPTIMIZER LET ENGINE DEPEND ON UNINITIALIZED VALUES
--echo # CREATED BY OPT_SUM_QUERY
--echo #
CREATE TABLE t1(a INT NOT NULL, KEY (a));
INSERT INTO t1 VALUES (0), (1);
--error ER_SUBQUERY_NO_1_ROW
SELECT 1 as foo FROM t1 WHERE a < SOME
(SELECT a FROM t1 WHERE a <=>
(SELECT a FROM t1)
);
SELECT 1 as foo FROM t1 WHERE a < SOME
(SELECT a FROM t1 WHERE a <=>
(SELECT a FROM t1 where a is null)
);
DROP TABLE t1;