mariadb/mysql-test/main/subselect_sj2_jcl6.test

# 
# Run subselect_sj2.test with BKA enabled 
#

set @save_optimizer_switch_jcl6=@@optimizer_switch;
set @@optimizer_switch='optimize_join_buffer_size=on';
set @@optimizer_switch='semijoin_with_cache=on';
set @@optimizer_switch='outer_join_with_cache=on';
set optimizer_switch='mrr=on,mrr_sort_keys=on,index_condition_pushdown=on';

set join_cache_level=6;
show variables like 'join_cache_level';

set @optimizer_switch_for_subselect_sj2_test=@@optimizer_switch;
set @join_cache_level_for_subselect_sj2_test=@@join_cache_level;

--source subselect_sj2.test

--echo #
--echo # Bug #898073: potential incremental join cache for semijoin
--echo #

CREATE TABLE t1 (a int, b varchar(1), KEY (b,a));
INSERT INTO t1 VALUES (0,'x'), (5,'r');

CREATE TABLE t2 (a int) ENGINE=InnoDB;
INSERT INTO t2 VALUES (8);

CREATE TABLE t3 (b varchar(1), c varchar(1)) ENGINE=InnoDB;
INSERT INTO t3 VALUES ('x','x');

CREATE TABLE t4 (a int NOT NULL, b varchar(1)) ENGINE=InnoDB;
INSERT INTO t4 VALUES (20,'r'), (10,'x');

set @tmp_optimizer_switch=@@optimizer_switch;

SET SESSION optimizer_switch='semijoin_with_cache=on';

SET SESSION join_cache_level=2;
EXPLAIN
SELECT t3.* FROM t1 JOIN t3 ON t3.b = t1.b
  WHERE c IN (SELECT t4.b FROM t4 JOIN t2);
SELECT t3.* FROM t1 JOIN t3 ON t3.b = t1.b
  WHERE c IN (SELECT t4.b FROM t4 JOIN t2);

set optimizer_switch=@tmp_optimizer_switch;
set join_cache_level=default;

DROP TABLE t1,t2,t3,t4;

--echo #
--echo # Bug #899696: potential incremental join cache for semijoin
--echo #

CREATE TABLE t1 (pk int PRIMARY KEY, a int);
INSERT INTO t1 VALUES (1, 6), (2, 8);
CREATE TABLE t2 (b int) ENGINE=InnoDB;
INSERT INTO t2 VALUES (8);
CREATE TABLE t3 (pk int PRIMARY KEY, a int);
INSERT INTO t3 VALUES (1, 6), (2, 8);
CREATE TABLE t4 (b int) ENGINE=InnoDB;
INSERT INTO t4 VALUES (2);

set @tmp_optimizer_switch=@@optimizer_switch;

SET optimizer_switch = 'semijoin_with_cache=on';
SET join_cache_level = 2;

EXPLAIN
SELECT * FROM t1, t2 WHERE b IN (SELECT a FROM t3, t4 WHERE b = pk);
SELECT * FROM t1, t2 WHERE b IN (SELECT a FROM t3, t4 WHERE b = pk);

set optimizer_switch=@tmp_optimizer_switch;
set join_cache_level=default;

DROP TABLE t1,t2,t3,t4;


--echo #
--echo # Bug #899962: materialized subquery with join_cache_level=3 
--echo #

CREATE TABLE t1 (a varchar(1), b varchar(1)) ENGINE=InnoDB;
INSERT INTO t1 VALUES ('v','v');
CREATE TABLE t2 (a varchar(1), b varchar(1)) ENGINE=InnoDB;
INSERT INTO t2 VALUES ('v','v');

set @tmp_optimizer_switch=@@optimizer_switch;

SET optimizer_switch = 'semijoin_with_cache=on';
SET join_cache_level = 3;

EXPLAIN
SELECT * FROM t1 WHERE b IN (SELECT a FROM t2 GROUP BY a);
SELECT * FROM t1 WHERE b IN (SELECT a FROM t2 GROUP BY a);

EXPLAIN
SELECT * FROM t1 WHERE b IN (SELECT max(a) FROM t2 GROUP BY a);
SELECT * FROM t1 WHERE b IN (SELECT max(a) FROM t2 GROUP BY a);

set optimizer_switch=@tmp_optimizer_switch;
set join_cache_level=default;

DROP TABLE t1,t2;

set @@optimizer_switch=@save_optimizer_switch_jcl6;
set @optimizer_switch_for_subselect_sj2_test=NULL;
set @join_cache_level_subselect_sj2_test=NULL;