mirror/mariadb
1
0
Fork 0
mirror of https://github.com/MariaDB/server.git synced 2026-04-26 18:25:30 +02:00
Code Issues Projects Releases Packages Wiki Activity

Change the default @@optimizer_switch setting from

Browse source 
semijoin=on,firstmatch=on,loosescan=on
to
  semijoin=off,firstmatch=off,loosescan=off
Adjust the testcases:
- Modify subselect*.test and join_cache.test so that all tests
  use the same execution paths as before (i.e. optimizations that
  are being tested are enabled)
- Let all other test files run with the new default settings (i.e.
  with new optimizations disabled)
- Copy subquery testcases from these files into t/subselect_extra.test
  which will run them with new optimizations enabled.
This commit is contained in:
Sergey Petrunya 2011-07-05 01:44:15 +04:00
commit c1de6f8b77
40 changed files with 266 additions and 168 deletions
Download patch file Download diff file Expand all files Collapse all files

11
mysql-test/t/subselect3.test
View file

@ -2,7 +2,8 @@
drop table if exists t0, t1, t2, t3, t4, t5, t11, t12, t21, t22;
--enable_warnings
set @save_optimizer_switch=@@optimizer_switch;
set @subselect3_tmp= @@optimizer_switch;
set optimizer_switch='semijoin=on,firstmatch=on,loosescan=on';
#
# 1. Subquery with GROUP/HAVING
@ -538,7 +539,6 @@ SELECT a, MAX(b),
DROP TABLE t1, t2;
# The next three test cases must be executed with the IN=>EXISTS strategy
set @save_optimizer_switch=@@optimizer_switch;
set @@optimizer_switch="partial_match_rowid_merge=off,partial_match_table_scan=off";
#
@ -906,7 +906,8 @@ set @@optimizer_switch='firstmatch=off,materialization=off';
insert into t0 values(2);
explain select * from t1 where 2 in (select a from t0);
select * from t1 where 2 in (select a from t0);
set @@optimizer_switch='default,materialization=off';
set @@optimizer_switch=@save_optimizer_switch;
set @@optimizer_switch='materialization=off';
explain select * from t1 where 2 in (select a from t0);
select * from t1 where 2 in (select a from t0);
set @@optimizer_switch=@save_optimizer_switch;
@ -1160,7 +1161,7 @@ drop table t1,t2,t3;
--echo # BUG#47367 Crash in Name_resolution_context::process_error
--echo #
SET SESSION optimizer_switch = 'default,semijoin=off';
SET SESSION optimizer_switch = 'semijoin=off';
CREATE TABLE t1 (f1 INTEGER);
CREATE TABLE t2 LIKE t1;
delimiter |;
@ -1186,4 +1187,4 @@ DROP PROCEDURE p1;
DROP TABLE t1, t2;
# The following command must be the last one the file
set @@optimizer_switch=@save_optimizer_switch;
set @@optimizer_switch=@subselect3_tmp;