database/mariadb
1
0
Fork 0
mirror of https://github.com/MariaDB/server.git synced 2025-07-30 16:24:05 +03:00
Code Activity

Merge 10.3 into 10.4

Browse Source
This commit is contained in:
Marko Mäkelä
2019-11-12 16:55:44 +02:00
parent e5f99a0c0c 5098d708a0
commit 33cb10d4e9
18 changed files with 537 additions and 492 deletions
Download Patch File Download Diff File Expand all files Collapse all files

32
mysql-test/main/selectivity.test
View File

@ -1235,6 +1235,38 @@ set optimizer_use_condition_selectivity= @@optimizer_use_condition_selectivity;
drop table t1,t2,t3;
--echo #
--echo # MDEV-20519: Query plan regression with optimizer_use_condition_selectivity=4
--echo #
create table t1 (id int, a int, PRIMARY KEY(id), key(a));
insert into t1 select seq,seq from seq_1_to_100;
create table t2 (id int, a int, b int, PRIMARY KEY(id), key(a), key(b));
insert into t2 select seq,seq,seq from seq_1_to_100;
set optimizer_switch='exists_to_in=off';
set optimizer_use_condition_selectivity=2;
let $query= SELECT * FROM t1
WHERE
EXISTS (SELECT * FROM t1 A INNER JOIN t2 ON t2.a = A.id
WHERE A.a=t1.a AND t2.b < 20);
eval $query;
eval explain $query;
EXPLAIN SELECT * FROM t1 A, t1 B WHERE A.a = B.a and A.id = 65;
eval explain $query;
set optimizer_switch= @save_optimizer_switch;
set optimizer_use_condition_selectivity= @save_optimizer_use_condition_selectivity;
drop table t1,t2;
--echo # End of 10.1 tests
#