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MDEV-5980: EITS: if condition is used for REF access, its selectivity is still in filtered%

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- Testcase. The bug is fixed by commit for MDEV-6003
This commit is contained in:
Sergey Petrunya
2014-04-25 19:12:06 +04:00
parent 2acd81af73
commit 54265c5f50
2 changed files with 43 additions and 0 deletions
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26
mysql-test/r/selectivity_no_engine.result
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@ -139,6 +139,32 @@ Warnings:
Note 1003 select `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t2`.`col1` AS `col1`,`test`.`t2`.`col2` AS `col2` from `test`.`t2` where ((`test`.`t2`.`a` in (1,2,3)) and (`test`.`t2`.`b` in (1,2,3)))
drop table t2, t1;
#
# MDEV-5980: EITS: if condition is used for REF access, its selectivity is still in filtered%
#
create table t0(a int);
insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
create table t1(key1 int, col1 int, key(key1));
insert into t1 select A.a, A.a from t0 A, t0 B, t0 C;
set histogram_size=100;
set use_stat_tables='preferably';
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 Table is already up to date
# 10% is ok
explain extended select * from t1 where col1=2;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 1000 9.90 Using where
Warnings:
Note 1003 select `test`.`t1`.`key1` AS `key1`,`test`.`t1`.`col1` AS `col1` from `test`.`t1` where (`test`.`t1`.`col1` = 2)
# Must show 100%, not 10%
explain extended select * from t1 where key1=2;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 ref key1 key1 5 const 98 100.00
Warnings:
Note 1003 select `test`.`t1`.`key1` AS `key1`,`test`.`t1`.`col1` AS `col1` from `test`.`t1` where (`test`.`t1`.`key1` = 2)
drop table t0, t1;
# MDEV-6003: EITS: ref access, keypart2=const vs keypart2=expr - inconsistent filtered% value
#
create table t0(a int);