Current File : //usr/share/mysql-test/t/optimizer_switch.test
# This test checks that setting of optimizer_switch works correctly.
# Test cases for bugs related to changing the setting of optimizer_switch,
# should go here.
--source include/have_semijoin.inc
--source include/have_materialization.inc
--source include/have_firstmatch.inc
--source include/have_loosescan.inc
--echo
--echo BUG#37120 optimizer_switch allowable values not according to specification
--echo
select @@optimizer_switch;
set optimizer_switch='default';
set optimizer_switch='materialization=off';
select @@optimizer_switch;
set optimizer_switch='default';
set optimizer_switch='semijoin=off';
select @@optimizer_switch;
set optimizer_switch='default';
set optimizer_switch='loosescan=off';
select @@optimizer_switch;
set optimizer_switch='default';
set optimizer_switch='semijoin=off,materialization=off';
select @@optimizer_switch;
set optimizer_switch='default';
set optimizer_switch='materialization=off,semijoin=off';
select @@optimizer_switch;
set optimizer_switch='default';
set optimizer_switch='semijoin=off,materialization=off,loosescan=off';
select @@optimizer_switch;
set optimizer_switch='default';
set optimizer_switch='semijoin=off,loosescan=off';
select @@optimizer_switch;
set optimizer_switch='default';
set optimizer_switch='materialization=off,loosescan=off';
select @@optimizer_switch;
set optimizer_switch='default';
# test re-optimization/re-execution with different execution methods
# prepare once, exec with different modes
create table t1 (a1 char(8), a2 char(8));
create table t2 (b1 char(8), b2 char(8));
insert into t1 values ('1 - 00', '2 - 00');
insert into t1 values ('1 - 01', '2 - 01');
insert into t1 values ('1 - 02', '2 - 02');
insert into t2 values ('1 - 01', '2 - 01');
insert into t2 values ('1 - 01', '2 - 01');
insert into t2 values ('1 - 02', '2 - 02');
insert into t2 values ('1 - 02', '2 - 02');
insert into t2 values ('1 - 03', '2 - 03');
set @@optimizer_switch="semijoin=off";
prepare st1 from
"select * from t1 where (a1, a2) in (select b1, min(b2) from t2 where b1 > '0' group by b1)";
set @@optimizer_switch="semijoin=on,materialization=off";
execute st1;
set @@optimizer_switch="semijoin=off,materialization=on";
execute st1;
set optimizer_switch='default';
set @@optimizer_switch="materialization=off";
prepare st1 from
"select * from t1 where (a1, a2) in (select b1, min(b2) from t2 where b1 > '0' group by b1)";
set @@optimizer_switch="semijoin=off,materialization=on";
execute st1;
set @@optimizer_switch="semijoin=on,materialization=off";
execute st1;
set optimizer_switch='default';
drop table t1, t2;
--echo #
--echo # BUG#47367 Crash in Name_resolution_context::process_error
--echo #
SET SESSION optimizer_switch = 'default,semijoin=off';
CREATE TABLE t1 (f1 INTEGER);
CREATE TABLE t2 LIKE t1;
delimiter |;
CREATE PROCEDURE p1 () BEGIN SELECT f1 FROM t1 WHERE f1 IN (SELECT f1 FROM t2); END|
delimiter ;|
CALL p1;
ALTER TABLE t2 CHANGE COLUMN f1 my_column INT;
CALL p1;
DROP PROCEDURE p1;
--echo # Restore the original column list of table t2:
ALTER TABLE t2 CHANGE COLUMN my_column f1 INT;
SET SESSION optimizer_switch = 'semijoin=on';
delimiter |;
--echo # Recreate procedure so that we eliminate any caching effects
CREATE PROCEDURE p1 () BEGIN SELECT f1 FROM t1 WHERE f1 IN (SELECT f1 FROM t2); END|
delimiter ;|
CALL p1;
ALTER TABLE t2 CHANGE COLUMN f1 my_column INT;
CALL p1;
DROP PROCEDURE p1;
DROP TABLE t1, t2;
SET SESSION optimizer_switch = 'default';
--echo #
--echo # Bug #46744 Crash in optimize_semijoin_nests on empty view
--echo # with limit and procedure.
--echo #
--disable_warnings
DROP TABLE IF EXISTS t1, t2;
DROP VIEW IF EXISTS v1;
DROP PROCEDURE IF EXISTS p1;
--enable_warnings
CREATE TABLE t1 ( f1 int );
CREATE TABLE t2 ( f1 int );
insert into t2 values (5), (7);
CREATE OR REPLACE VIEW v1 AS SELECT * FROM t1 LIMIT 2;
create procedure p1()
select COUNT(*)
FROM v1 WHERE f1 IN
(SELECT f1 FROM t2 WHERE f1 = ANY (SELECT f1 FROM v1));
SET SESSION optimizer_switch = 'semijoin=on';
CALL p1();
SET SESSION optimizer_switch = 'semijoin=off';
CALL p1();
drop table t1, t2;
drop view v1;
drop procedure p1;
set SESSION optimizer_switch='default';
--echo # End of bug#46744
--echo #
--echo # Bug#50489: another segfault in fix_semijoin_strategies...
--echo #
CREATE TABLE it (
id INT NOT NULL,
expr_key INT NOT NULL,
expr_nokey INT NOT NULL,
expr_padder INT DEFAULT NULL,
KEY expr_key(expr_key)
);
INSERT INTO it VALUES (135,218264606,218264606,100);
INSERT INTO it VALUES (201,810783319,810783319,200);
CREATE TABLE ot (
id INT NOT NULL,
expr_key INT NOT NULL,
expr_nokey INT NOT NULL,
KEY expr_key(expr_key)
);
delimiter |;
let proc_text=
CREATE PROCEDURE run_n_times(x int)
BEGIN
DECLARE c int;
WHILE x DO
SET x = x-1;
SELECT COUNT(expr_key) INTO c FROM ot
WHERE expr_key IN (SELECT expr_nokey FROM it)
AND ot.expr_key<100000000;
END WHILE;
END|
delimiter ;|
eval $proc_text;
SET optimizer_switch="default";
call run_n_times(1);
SET optimizer_switch="firstmatch=off,materialization=off";
call run_n_times(1);
SET optimizer_switch="default";
call run_n_times(1);
DROP PROCEDURE run_n_times;
# Re-create procedure to avoid caching effects
eval $proc_text;
SET optimizer_switch="firstmatch=off,materialization=off";
call run_n_times(1);
SET optimizer_switch="default";
call run_n_times(1);
DROP PROCEDURE run_n_times;
# Re-create procedure to avoid caching effects
eval $proc_text;
SET optimizer_switch="semijoin=off,materialization=off";
call run_n_times(1);
SET optimizer_switch="default";
call run_n_times(1);
DROP PROCEDURE run_n_times;
DROP TABLE it, ot;
# End of Bug#50489
--echo #
--echo # BUG#31480: Incorrect result for nested subquery when executed via semijoin
--echo #
CREATE TABLE t1 (a INT NOT NULL, b INT NOT NULL);
CREATE TABLE t2 (c INT NOT NULL, d INT NOT NULL);
CREATE TABLE t3 (e INT NOT NULL);
CREATE TABLE t4 (f INT NOT NULL, g INT NOT NULL);
INSERT INTO t1 VALUES (1,10);
INSERT INTO t1 VALUES (2,10);
INSERT INTO t1 VALUES (1,20);
INSERT INTO t1 VALUES (2,20);
INSERT INTO t1 VALUES (3,20);
INSERT INTO t1 VALUES (2,30);
INSERT INTO t1 VALUES (4,40);
INSERT INTO t2 VALUES (2,10);
INSERT INTO t2 VALUES (2,20);
INSERT INTO t2 VALUES (4,10);
INSERT INTO t2 VALUES (5,10);
INSERT INTO t2 VALUES (3,20);
INSERT INTO t2 VALUES (2,40);
INSERT INTO t3 VALUES (10);
INSERT INTO t3 VALUES (30);
INSERT INTO t3 VALUES (10);
INSERT INTO t3 VALUES (20);
INSERT INTO t4 VALUES (2,10);
INSERT INTO t4 VALUES (2,10);
INSERT INTO t4 VALUES (3,10);
INSERT INTO t4 VALUES (4,10);
INSERT INTO t4 VALUES (4,20);
INSERT INTO t4 VALUES (4,20);
--echo # Reference to the parent query block (used tables was wrong)
set @@optimizer_switch='materialization=off,semijoin=off';
let query=
SELECT * FROM t1 AS ta
WHERE ta.a IN (SELECT c FROM t2 AS tb
WHERE tb.d >= SOME(SELECT e FROM t3 as tc
WHERE ta.b=tc.e));
eval EXPLAIN $query;
eval $query;
set @@optimizer_switch='materialization=off,semijoin=on';
eval EXPLAIN $query;
eval $query;
--echo # Subquery with GROUP BY and HAVING
set @@optimizer_switch='materialization=off,semijoin=off';
let query=
SELECT * FROM t1 AS ta
WHERE ta.a IN (SELECT c FROM t2 AS tb
WHERE tb.d >= SOME(SELECT SUM(g) FROM t4 as tc
GROUP BY f
HAVING ta.a=tc.f));
eval EXPLAIN $query;
eval $query;
set @@optimizer_switch='materialization=off,semijoin=on';
eval EXPLAIN $query;
eval $query;
--echo # Subquery with ORDER BY and LIMIT
set @@optimizer_switch='materialization=off,semijoin=off';
--echo # NOTE: The ordered subquery should have a LIMIT clause to make sense
let query=
SELECT * FROM t1 AS ta
WHERE ta.a IN (SELECT c FROM t2 AS tb
WHERE tb.d IN (SELECT g FROM t4 as tc
WHERE ta.a=tc.f
ORDER BY tc.f));
eval EXPLAIN $query;
eval $query;
set @@optimizer_switch='materialization=off,semijoin=on';
eval EXPLAIN $query;
eval $query;
--echo # Reference to the transformed-away query block (dependency was wrong)
set @@optimizer_switch='materialization=off,semijoin=off';
let query=
SELECT * FROM t1 AS ta
WHERE ta.a IN (SELECT c FROM t2 AS tb
WHERE tb.d >= SOME(SELECT e FROM t3 as tc
WHERE tb.d=tc.e));
eval EXPLAIN $query;
eval $query;
set @@optimizer_switch='materialization=off,semijoin=on';
eval EXPLAIN $query;
eval $query;
--echo # Reference above the parent query block (should not be affected)
set @@optimizer_switch='materialization=off,semijoin=off';
let query=
SELECT * FROM t1 AS t
WHERE t.a NOT IN (SELECT a FROM t1 AS ta
WHERE ta.a IN (SELECT c FROM t2 AS tb
WHERE tb.d >= SOME(SELECT e FROM t3 as tc
WHERE t.b=tc.e)));
eval EXPLAIN $query;
eval $query;
set @@optimizer_switch='materialization=off,semijoin=on';
eval EXPLAIN $query;
eval $query;
--echo # EXISTS with reference to the parent query block
set @@optimizer_switch='materialization=off,semijoin=off';
let query=
SELECT * FROM t1 AS ta
WHERE ta.a IN (SELECT c FROM t2 AS tb
WHERE EXISTS (SELECT * FROM t3 as tc
WHERE ta.b=tc.e));
eval EXPLAIN $query;
eval $query;
set @@optimizer_switch='materialization=off,semijoin=on';
eval EXPLAIN $query;
eval $query;
--echo # Scalar subquery with reference to the parent query block
set @@optimizer_switch='materialization=off,semijoin=off';
let query=
SELECT * FROM t1 AS ta
WHERE ta.a IN (SELECT c FROM t2 AS tb
WHERE tb.d = (SELECT MIN(e) FROM t3 as tc
WHERE ta.b=tc.e));
eval EXPLAIN $query;
eval $query;
set @@optimizer_switch='materialization=off,semijoin=on';
eval EXPLAIN $query;
eval $query;
--echo # Combine scalar subquery with quantified comparison subquery
set @@optimizer_switch='materialization=off,semijoin=off';
let query=
SELECT * FROM t1 AS ta
WHERE ta.a IN (SELECT c FROM t2 AS tb
WHERE (SELECT MIN(e) FROM t3 as tc
WHERE tb.d=tc.e) < SOME(SELECT e FROM t3 as tc
WHERE ta.b=tc.e));
eval EXPLAIN $query;
eval $query;
set @@optimizer_switch='materialization=off,semijoin=on';
eval EXPLAIN $query;
eval $query;
DROP TABLE t1, t2, t3, t4;
set @@optimizer_switch='default';
--echo # End of BUG#31480
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