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Fixed bug mdev-6325.

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Field::selectivity should be set for all fields used in range conditions.
This commit is contained in:
Igor Babaev
2014-10-28 14:33:31 -07:00
parent af4d469a8d
commit 592b7fbac9
5 changed files with 123 additions and 13 deletions
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35
mysql-test/r/selectivity_innodb.result
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@ -1356,6 +1356,41 @@ foo foo 1
foo foo 2
set optimizer_use_condition_selectivity=@save_optimizer_use_condition_selectivity;
DROP TABLE t1,t2;
#
# Bug mdev-6325: wrong selectivity of a column with ref access
#
create table t0(a int);
insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
create table t1(a int);
insert into t1 select A.a + B.a* 10 + C.a * 100 from t0 A, t0 B, t0 C;
create table t2 (a int, b int, key(a));
insert into t2 select A.a + 10*B.a, 12345 from t0 A, t0 B, t0 C;
set use_stat_tables='preferably';
set histogram_size=100;
set optimizer_use_condition_selectivity=4;
analyze table t1 persistent for all;
Table Op Msg_type Msg_text
test.t1 analyze status Engine-independent statistics collected
test.t1 analyze status OK
analyze table t2 persistent for all;
Table Op Msg_type Msg_text
test.t2 analyze status Engine-independent statistics collected
test.t2 analyze status OK
explain extended
select * from t1 straight_join t2 where t1.a=t2.a and t1.a<10;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 1000 0.99 Using where
1 SIMPLE t2 ref a a 5 test.t1.a 10 100.00
Warnings:
Note 1003 select `test`.`t1`.`a` AS `a`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b` from `test`.`t1` straight_join `test`.`t2` where ((`test`.`t2`.`a` = `test`.`t1`.`a`) and (`test`.`t1`.`a` < 10))
explain extended
select * from t1 straight_join t2 where t1.a=t2.a and t2.a<10;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 1000 0.99 Using where
1 SIMPLE t2 ref a a 5 test.t1.a 10 100.00
Warnings:
Note 1003 select `test`.`t1`.`a` AS `a`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b` from `test`.`t1` straight_join `test`.`t2` where ((`test`.`t2`.`a` = `test`.`t1`.`a`) and (`test`.`t1`.`a` < 10))
drop table t0,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;