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| author | Igor Babaev <igor@askmonty.org> | 2015-02-05 20:09:08 -0800 |
|---|---|---|
| committer | Igor Babaev <igor@askmonty.org> | 2015-02-05 20:09:08 -0800 |
| commit | 587c72088c661e6ca441460675e1f1dc69d5e749 (patch) | |
| tree | 74519f5e6c0da2e7c067c21cb53238e878ac13ef /mysql-test/r/selectivity_innodb.result | |
| parent | 826d7c68d210f5c34998108aa5e29909344e3683 (diff) | |
| download | mariadb-git-587c72088c661e6ca441460675e1f1dc69d5e749.tar.gz | |
Fixed bug mdev-7316.
The function table_cond_selectivity() should take into account that condition selectivity
for some fields can be set to 0.
Diffstat (limited to 'mysql-test/r/selectivity_innodb.result')
| -rw-r--r-- | mysql-test/r/selectivity_innodb.result | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/mysql-test/r/selectivity_innodb.result b/mysql-test/r/selectivity_innodb.result index 0b7f1c950e5..558e370c6e1 100644 --- a/mysql-test/r/selectivity_innodb.result +++ b/mysql-test/r/selectivity_innodb.result @@ -1419,6 +1419,36 @@ Note 1003 select `test`.`a`.`a` AS `a`,`test`.`a`.`b` AS `b`,`test`.`b`.`a` AS ` set histogram_size=@save_histogram_size; set optimizer_use_condition_selectivity=@save_optimizer_use_condition_selectivity; drop table t0,t1,t2; +# +# Bug mdev-7316: a conjunct in WHERE with selectivity == 0 +# +CREATE TABLE t1 (a varchar(16), b int, PRIMARY KEY(a), KEY(b)) ENGINE=INNODB; +INSERT INTO t1 VALUES +('USAChinese',10), ('USAEnglish',20), ('USAFrench',30); +CREATE TABLE t2 (i int) ENGINE=INNODB; +INSERT INTO t2 VALUES +(1),(2),(3),(4),(5),(6),(7),(8),(9),(10),(1),(2),(3),(4); +ANALYZE TABLE t1, t2; +Table Op Msg_type Msg_text +test.t1 analyze status Engine-independent statistics collected +test.t1 analyze status OK +test.t2 analyze status Engine-independent statistics collected +test.t2 analyze status OK +set use_stat_tables='preferably'; +set optimizer_use_condition_selectivity=3; +EXPLAIN EXTENDED +SELECT * FROM t1, t2 +WHERE a <> 'USARussian' AND b IS NULL; +id select_type table type possible_keys key key_len ref rows filtered Extra +1 SIMPLE t1 ref PRIMARY,b b 5 const 2 66.67 Using where; Using index +1 SIMPLE t2 ALL NULL NULL NULL NULL 14 100.00 Using join buffer (flat, BNL join) +Warnings: +Note 1003 select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`i` AS `i` from `test`.`t1` join `test`.`t2` where ((`test`.`t1`.`a` <> 'USARussian') and isnull(`test`.`t1`.`b`)) +SELECT * FROM t1, t2 +WHERE a <> 'USARussian' AND b IS NULL; +a b i +set optimizer_use_condition_selectivity=@save_optimizer_use_condition_selectivity; +DROP TABLE t1,t2; set use_stat_tables=@save_use_stat_tables; set optimizer_switch=@save_optimizer_switch_for_selectivity_test; set @tmp_ust= @@use_stat_tables; |