database/mariadb
1
0
Fork 0
mirror of https://github.com/MariaDB/server.git synced 2025-12-18 10:22:14 +03:00
Code Activity

#2970 test case for the epic query problem with covering keys refs[t:2970]

Browse Source 
git-svn-id: file:///svn/mysql/tests/mysql-test@24515 c7de825b-a66e-492c-adef-691d508d4ae1
This commit is contained in:
Rich Prohaska
2010-10-12 18:16:31 +00:00
parent 7073d1fcba
commit 378c38550a
2 changed files with 24 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

13
mysql-test/suite/tokudb.bugs/r/2970.result Normal file
View File

@@ -0,0 +1,13 @@
drop table if exists t2970;
Warnings:
Note 1051 Unknown table 't2970'
create table t2970 (a int, b int, c int, d int, key(a), key(a,b)) engine=innodb;
insert into t2970 values (1,1,1,1),(1,2,3,4);
explain select a,count(b),max(b) from t2970 where a > 0 group by a order by a;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t2970 index a,a_2 a_2 10 NULL 2 Using where; Using index
alter table t2970 engine=tokudb;
explain select a,count(b),max(b) from t2970 where a > 0 group by a order by a;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t2970 index a,a_2 a_2 10 NULL 2 Using where; Using index
drop table t2970;

11
mysql-test/suite/tokudb.bugs/t/2970.test Normal file
View File

@@ -0,0 +1,11 @@
# test that the query planner chooses a covering index over a non-covering index with the same
# record cost
drop table if exists t2970;
create table t2970 (a int, b int, c int, d int, key(a), key(a,b)) engine=innodb;
insert into t2970 values (1,1,1,1),(1,2,3,4);
explain select a,count(b),max(b) from t2970 where a > 0 group by a order by a;
alter table t2970 engine=tokudb;
explain select a,count(b),max(b) from t2970 where a > 0 group by a order by a;
drop table t2970;