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| author | Igor Babaev <igor@askmonty.org> | 2016-11-29 11:28:15 -0800 |
|---|---|---|
| committer | Igor Babaev <igor@askmonty.org> | 2016-11-29 11:29:07 -0800 |
| commit | 748d993cca6c63d40236ac7c937630965283242d (patch) | |
| tree | eda809397f2567629970423af6fca97fbc377396 /mysql-test/t/selectivity.test | |
| parent | b209bc3eedfabc205af89f9e4c3af86bdfc6277a (diff) | |
| download | mariadb-git-748d993cca6c63d40236ac7c937630965283242d.tar.gz | |
Fixed bug mdev-11364.
The function Item_func_isnull::update_used_tables() must
handle the case when the predicate is over not nullable
column in a special way.
This is actually a bug of MariaDB 5.3/5.5, but it's probably
hard to demonstrate that it can cause problems there.
Diffstat (limited to 'mysql-test/t/selectivity.test')
| -rw-r--r-- | mysql-test/t/selectivity.test | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/mysql-test/t/selectivity.test b/mysql-test/t/selectivity.test index 8efc5216ba0..548ef295fb2 100644 --- a/mysql-test/t/selectivity.test +++ b/mysql-test/t/selectivity.test @@ -1025,3 +1025,24 @@ drop table t1,t2; set optimizer_use_condition_selectivity=@save_optimizer_use_condition_selectivity; set use_stat_tables=@save_use_stat_tables; +--echo # +--echo # Bug mdev-11364: IS NULL over not nullable datetime column +--echo # in mergeable derived +--echo # + +set use_stat_tables='preferably'; +set optimizer_use_condition_selectivity=4; +set HISTOGRAM_SIZE = 255; + +CREATE TABLE t1 (t TIME, d DATE NOT NULL); +INSERT INTO t1 VALUES ('10:00:00', '0000-00-00'),('11:00:00','0000-00-00'); + +ANALYZE TABLE t1; + +SELECT * FROM (SELECT t FROM t1 WHERE d IS NULL) sq; + +DROP TABLE t1; + +set histogram_size=@save_histogram_size; +set optimizer_use_condition_selectivity=@save_optimizer_use_condition_selectivity; +set use_stat_tables=@save_use_stat_tables; |