mariadb/mysql-test/t/subselect_mat.test

#
# Hash semi-join regression tests
# (WL#1110: Subquery optimization: materialization)
#


# force the use of materialization
set @subselect_mat_test_optimizer_switch_value='materialization=on,in_to_exists=off,semijoin=off';

--source t/subselect_sj_mat.test
set @subselect_mat_test_optimizer_switch_value=null;

set @@optimizer_switch='materialization=on,in_to_exists=off,semijoin=off';
set optimizer_switch='mrr=on,mrr_sort_keys=on,index_condition_pushdown=on';
#
# Test that the contents of the temp table of a materialized subquery is
# cleaned up between PS re-executions.
#

create table t0 (a int);
insert into t0 values (0),(1),(2);
create table t1 (a int);
insert into t1 values (0),(1),(2);
explain select a, a in (select a from t1) from t0;
select a, a in (select a from t1) from t0;
prepare s from 'select a, a in (select a from t1) from t0';
execute s;
update t1 set a=123;
execute s;
drop table t0, t1;


--echo #
--echo # LPBUG#609121: RQG: wrong result on aggregate + NOT IN + HAVING and
--echo # partial_match_table_scan=on
--echo #

create table t1 (c1 int);
create table t2 (c2 int);
insert into t1 values (1);
insert into t2 values (2);

set @@optimizer_switch='semijoin=off';

EXPLAIN
SELECT SUM(c1) c1_sum FROM t1 WHERE c1 IN (SELECT c2 FROM t2);
SELECT SUM(c1) c1_sum FROM t1 WHERE c1 IN (SELECT c2 FROM t2);
EXPLAIN
SELECT SUM(c1) c1_sum FROM t1 WHERE c1 IN (SELECT c2 FROM t2) HAVING c1_sum;
SELECT SUM(c1) c1_sum FROM t1 WHERE c1 IN (SELECT c2 FROM t2) HAVING c1_sum;

drop table t1, t2;

--echo #
--echo # BUG#52344 - Subquery materialization: 
--echo #  	     Assertion if subquery in on-clause of outer join
--echo #

set @@optimizer_switch='semijoin=off';

CREATE TABLE t1 (i INTEGER);
INSERT INTO t1 VALUES (10);

CREATE TABLE t2 (j INTEGER);
INSERT INTO t2 VALUES (5);

CREATE TABLE t3 (k INTEGER);

EXPLAIN
SELECT i FROM t1 LEFT JOIN t2 ON (j) IN (SELECT k FROM t3);
SELECT i FROM t1 LEFT JOIN t2 ON (j) IN (SELECT k FROM t3);

EXPLAIN
SELECT i FROM t1 LEFT JOIN t2 ON (j) IN (SELECT max(k) FROM t3);
SELECT i FROM t1 LEFT JOIN t2 ON (j) IN (SELECT max(k) FROM t3);

DROP TABLE t1, t2, t3;

--echo #
--echo # LPBUG#611622/BUG#52344: Subquery materialization:  Assertion 
--echo #                         if subquery in on-clause of outer join
--echo #

CREATE TABLE t1 (c1 int);
INSERT INTO t1 VALUES (1),(2);

CREATE TABLE t2 (c2 int);
INSERT INTO t2 VALUES (10);

PREPARE st1 FROM "
SELECT *
FROM t2 LEFT JOIN t2 t3 ON (8, 4) IN (SELECT c1, c1 FROM t1)";

EXECUTE st1;
EXECUTE st1;

DROP TABLE t1, t2;

--echo # 
--echo # Testcase backport: BUG#46548 IN-subqueries return 0 rows with materialization=on
--echo # 
CREATE TABLE t1 (
  pk int,
  a varchar(1),
  b varchar(4),
  c varchar(4),
  d varchar(4),
  PRIMARY KEY (pk)
);
INSERT INTO t1 VALUES (1,'o','ffff','ffff','ffoo'),(2,'f','ffff','ffff','ffff');

CREATE TABLE t2 LIKE t1;
INSERT INTO t2 VALUES (1,'i','iiii','iiii','iiii'),(2,'f','ffff','ffff','ffff');

SET @@optimizer_switch='default,semijoin=on,materialization=on';
EXPLAIN SELECT pk FROM t1 WHERE (a) IN (SELECT a FROM t2 WHERE pk > 0);
SELECT pk FROM t1 WHERE (a) IN (SELECT a FROM t2 WHERE pk > 0);
SELECT pk FROM t1 WHERE (b,c,d) IN (SELECT b,c,d FROM t2 WHERE pk > 0);
DROP TABLE t1, t2;


-- echo #
-- echo # BUG#724228: Wrong result with materialization=on and three aggregates in maria-5.3-mwl90
-- echo #
CREATE TABLE t1 ( f2 int(11)) ;
INSERT IGNORE INTO t1 VALUES ('7'),('9'),('7'),('4'),('2'),('6'),('8'),('5'),('6'),('188'),('2'),('1'),('1'),('0'),('9'),('4');

CREATE TABLE t2 ( f1 int(11), f2 int(11)) ENGINE=MyISAM;
INSERT IGNORE INTO t2 VALUES ('1','1');

CREATE TABLE t3 ( f1 int(11), f2 int(11), f3 int(11), PRIMARY KEY (f1)) ;
INSERT IGNORE INTO t3 VALUES ('16','6','1'),('18','3','4'),('19',NULL,'9'),('20','0','6'),('41','2','0'),('42','2','5'),('43','9','6'),('44','7','4'),('45','1','4'),('46','222','238'),('47','3','6'),('48','6','6'),('49',NULL,'1'),('50','5','1');

SET @_save_join_cache_level = @@join_cache_level;
SET @_save_optimizer_switch = @@optimizer_switch;

SET join_cache_level = 1;
SET optimizer_switch='materialization=on';

SELECT f1 FROM t3
WHERE 
  f1 NOT IN (SELECT MAX(f2) FROM t1) AND 
  f3 IN (SELECT MIN(f1) FROM t2) AND 
  f1 IN (SELECT COUNT(f2) FROM t1);

SET @@join_cache_level = @_save_join_cache_level;
SET @@optimizer_switch = @_save_optimizer_switch;

drop table t1, t2, t3;

--echo #
--echo # LPBUG#719198 Ordered_key::cmp_key_with_search_key(rownum_t): Assertion `!compare_pred[i]->null_value'
--echo # failed with subquery on both sides of NOT IN and materialization
--echo #

CREATE TABLE t1 (f1a int, f1b int) ;
INSERT IGNORE INTO t1 VALUES (1,1),(2,2);
CREATE TABLE t2 ( f2 int);
INSERT IGNORE INTO t2 VALUES (3),(4);
CREATE TABLE t3 (f3a int, f3b int);

set @@optimizer_switch='materialization=on,partial_match_rowid_merge=on,partial_match_table_scan=off,in_to_exists=off';

EXPLAIN
SELECT * FROM t2 WHERE (SELECT f3a FROM t3) NOT IN (SELECT f1a FROM t1);
SELECT * FROM t2 WHERE (SELECT f3a FROM t3) NOT IN (SELECT f1a FROM t1);

EXPLAIN
SELECT (SELECT f3a FROM t3) NOT IN (SELECT f1a FROM t1);
SELECT (SELECT f3a FROM t3) NOT IN (SELECT f1a FROM t1);

EXPLAIN
SELECT * FROM t2 WHERE (SELECT f3a, f3b FROM t3) NOT IN (SELECT f1a, f1b FROM t1);
SELECT * FROM t2 WHERE (SELECT f3a, f3b FROM t3) NOT IN (SELECT f1a, f1b FROM t1);

EXPLAIN
SELECT (SELECT f3a, f3b FROM t3) NOT IN (SELECT f1a, f1b FROM t1);
SELECT (SELECT f3a, f3b FROM t3) NOT IN (SELECT f1a, f1b FROM t1);

drop table t1, t2, t3;

--echo #
--echo # LPBUG#730604 Assertion `bit < (map)->n_bits' failed in maria-5.3 with
--echo #  partial_match_rowid_merge
--echo #

CREATE TABLE t1 (f1 int NOT NULL, f2 int, f3 int) ;
CREATE TABLE t2 (f1 int NOT NULL, f2 int, f3 int) ;

INSERT INTO t1 VALUES (60, 3, null), (61, null, 77);
INSERT INTO t2 VALUES (1000,6,2);

set @@optimizer_switch='materialization=on,partial_match_rowid_merge=on,partial_match_table_scan=off,in_to_exists=off';

EXPLAIN
SELECT (f1, f2, f3) NOT IN
       (SELECT COUNT(DISTINCT f2), f1, f3 FROM t1 GROUP BY f1, f3)
FROM t2;

SELECT (f1, f2, f3) NOT IN
       (SELECT COUNT(DISTINCT f2), f1, f3 FROM t1 GROUP BY f1, f3)
FROM t2;

drop table t1, t2;

--echo #
--echo # LPBUG#702301: MAX in select + always false WHERE with SQ
--echo #

CREATE TABLE t1 (a int, b int, KEY (b));
INSERT INTO t1 VALUES (3,1), (4,2);
CREATE TABLE t2 (a int);
INSERT INTO t2 VALUES (7), (8);

set @@optimizer_switch='materialization=on,in_to_exists=off,semijoin=off';

SELECT MAX(t1.b) AS max_res FROM t1 WHERE (9) IN (SELECT a FROM t2);
EXPLAIN EXTENDED
SELECT MAX(t1.b) AS max_res FROM t1 WHERE (9) IN (SELECT a FROM t2);

set @@optimizer_switch='materialization=off,in_to_exists=on,semijoin=off';

SELECT MAX(t1.b) AS max_res FROM t1 WHERE (9) IN (SELECT a FROM t2);
EXPLAIN EXTENDED
SELECT MAX(t1.b) AS max_res FROM t1 WHERE (9) IN (SELECT a FROM t2);

DROP TABLE t1,t2;

--echo #
--echo # LPBUG#825095: Wrong result with materialization and NOT IN with 2 expressions
--echo #

CREATE TABLE t1 (a int,b int);
INSERT INTO t1 VALUES (4,4),(4,2);

CREATE TABLE t2 (b int, a int);
INSERT INTO t2 VALUES (4,3),(8,4);

set @@optimizer_switch='semijoin=off,in_to_exists=off,materialization=on,partial_match_rowid_merge=on,partial_match_table_scan=off';

EXPLAIN SELECT *
FROM t1
WHERE (a, b) NOT IN (SELECT a, b FROM t2);

SELECT *
FROM t1
WHERE (a, b) NOT IN (SELECT a, b FROM t2);

EXPLAIN
SELECT a, b, (a, b) NOT IN (SELECT a, b FROM t2) as sq
FROM t1;

SELECT a, b, (a, b) NOT IN (SELECT a, b FROM t2) as sq
FROM t1;

drop table t1, t2;