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Diffstat (limited to 'mysql-test/r/selectivity.result')
| -rw-r--r-- | mysql-test/r/selectivity.result | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/mysql-test/r/selectivity.result b/mysql-test/r/selectivity.result index 3f2343fa365..620bdc6bd50 100644 --- a/mysql-test/r/selectivity.result +++ b/mysql-test/r/selectivity.result @@ -1409,4 +1409,40 @@ 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; +Warnings: +Warning 1286 Unknown storage engine 'INNODB' +Warning 1266 Using storage engine MyISAM for table 't1' +INSERT INTO t1 VALUES +('USAChinese',10), ('USAEnglish',20), ('USAFrench',30); +CREATE TABLE t2 (i int) ENGINE=INNODB; +Warnings: +Warning 1286 Unknown storage engine 'INNODB' +Warning 1266 Using storage engine MyISAM for table 't2' +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 1 100.00 Using index condition; Using where +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; |