path: root/mysql-test/t/subselect_mat_cost.test

#
# Tets of cost-based choice between the materialization and in-to-exists
# subquery execution strategies (MWL#89)
#

--disable_warnings
drop table if exists t1, t2, t1_1024, t2_1024;
drop procedure if exists make_t1_indexes;
drop procedure if exists make_t2_indexes;
drop procedure if exists remove_t1_indexes;
drop procedure if exists remove_t2_indexes;
drop procedure if exists add_materialization_data;
drop procedure if exists delete_materialization_data;
drop procedure if exists set_all_columns_not_null;
drop procedure if exists set_all_columns_nullable;
--enable_warnings

create table t1 (a1 char(8), a2 char(8), a3 char(8), a4 int);
insert into t1 values ('1 - 00', '2 - 00', '3 - 00', 0);
insert into t1 values ('1 - 01', '2 - 01', '3 - 01', 1);
insert into t1 values ('1 - 02', '2 - 02', '3 - 02', 2);

create table t2 (b1 char(8), b2 char(8), b3 char(8), b4 int);
insert into t2 values ('1 - 01', '2 - 01', '3 - 01', 1);
insert into t2 values ('1 - 01', '2 - 01', '3 - 02', 2);
insert into t2 values ('1 - 02', '2 - 02', '3 - 03', 3);
insert into t2 values ('1 - 02', '2 - 02', '3 - 04', 4);
insert into t2 values ('1 - 03', '2 - 03', '3 - 05', 5);

create table t1_1024 (a1 blob(1024), a2 blob(1024));
insert into t1_1024 values (concat('1 - 00', repeat('x', 1018)), concat('2 - 00', repeat('x', 1018)));
insert into t1_1024 values (concat('1 - 01', repeat('x', 1018)), concat('2 - 01', repeat('x', 1018)));

create table t2_1024 (b1 blob(1024), b2 blob(1024));
insert into t2_1024 values (concat('1 - 01', repeat('x', 1018)), concat('2 - 01', repeat('x', 1018)));
insert into t2_1024 values (concat('1 - 02', repeat('x', 1018)), concat('2 - 02', repeat('x', 1018)));
insert into t2_1024 values (concat('1 - 03', repeat('x', 1018)), concat('2 - 03', repeat('x', 1018)));
insert into t2_1024 values (concat('1 - 04', repeat('x', 1018)), concat('2 - 04', repeat('x', 1018)));

delimiter |;
create procedure make_t1_indexes()
begin
  create index it1i1 on t1 (a1);
  create index it1i2 on t1 (a2);
  create index it1i3 on t1 (a1, a2);
  create index it1_1024i1 on t1_1024 (a1(6));
  create index it1_1024i2 on t1_1024 (a2(6));
  create index it1_1024i3 on t1_1024 (a1(6), a2(6));
end|

create procedure make_t2_indexes()
begin
  create index it2i1 on t2 (b1);
  create index it2i2 on t2 (b2);
  create index it2i3 on t2 (b1, b2);
  create unique index it2i4 on t2 (b1, b2, b3);
  create index it2_1024i1 on t2_1024 (b1(6));
  create index it2_1024i2 on t2_1024 (b2(6));
  create index it2_1024i3 on t2_1024 (b1(6), b2(6));
end|

create procedure remove_t1_indexes()
begin
  drop index it1i1 on t1;
  drop index it1i2 on t1;
  drop index it1i3 on t1;
  drop index it1_1024i1 on t1_1024;
  drop index it1_1024i2 on t1_1024;
  drop index it1_1024i3 on t1_1024;
end|

create procedure remove_t2_indexes()
begin
  drop index it2i1 on t2;
  drop index it2i2 on t2;
  drop index it2i3 on t2;
  drop index it2i4 on t2;
  drop index it2_1024i1 on t2_1024;
  drop index it2_1024i2 on t2_1024;
  drop index it2_1024i3 on t2_1024;
end|

create procedure add_materialization_data()
begin
insert into t1 values ('1 - 03', '2 - 03', '3 - 03', 3);
insert into t1 values ('1 - 04', '2 - 04', '3 - 04', 4);
insert into t1 values ('1 - 05', '2 - 05', '3 - 05', 5);
insert into t1 values ('1 - 06', '2 - 06', '3 - 06', 6);
insert into t1 values ('1 - 07', '2 - 07', '3 - 07', 7);
insert into t1_1024 values (concat('1 - 03', repeat('x', 1018)), concat('2 - 03', repeat('x', 1018)));
end|

create procedure delete_materialization_data()
begin
delete from t1 where a1 >= '1 - 03';
delete from t1_1024 where a1 >= '1 - 03';
end|

create procedure set_all_columns_not_null()
begin
alter table t1 modify a1 char(8) not null, modify a2 char(8) not null, modify a3 char(8) not null;
alter table t2 modify b1 char(8) not null, modify b2 char(8) not null, modify b3 char(8) not null;
end|

create procedure set_all_columns_nullable()
begin
alter table t1 modify a1 char(8) null, modify a2 char(8) null, modify a3 char(8) null;
alter table t2 modify b1 char(8) null, modify b2 char(8) null, modify b3 char(8) null;
end|

delimiter ;|
-- echo

-- echo /******************************************************************************
-- echo 1. Both materialization and in-to-exists are ON, make a cost-based choice.
-- echo ******************************************************************************/
set @@optimizer_switch='materialization=on,in_to_exists=on';
-- echo 
-- echo /* 1.1 In-to-exists is cheaper */
call make_t1_indexes();

-- echo /* 1.1.1 non-indexed table access */
-- source include/subselect_mat_cost.inc

-- echo /* 1.1.2 indexed table access, nullabale columns. */
call make_t2_indexes();
-- source include/subselect_mat_cost.inc

-- echo /* 1.1.3 indexed table access, non-nullabale columns. */
call set_all_columns_not_null();
-- source include/subselect_mat_cost.inc
call set_all_columns_nullable();

-- echo 
-- echo /* 1.2 Materialization is cheaper */
# make materialization cheaper
call add_materialization_data();
call remove_t1_indexes();

-- echo /* 1.2.1 non-indexed table access */
call remove_t2_indexes();
-- source include/subselect_mat_cost.inc

-- echo /* 1.2.2 indexed table access, nullabale columns. */
call make_t2_indexes();
-- source include/subselect_mat_cost.inc

-- echo /* 1.2.3 indexed table access, non-nullabale columns. */
call set_all_columns_not_null();
-- source include/subselect_mat_cost.inc
call set_all_columns_nullable();


-- echo /******************************************************************************
-- echo 2. Materialization is OFF, in-to-exists is ON, materialization is cheaper.
-- echo ******************************************************************************/
set @@optimizer_switch='materialization=off,in_to_exists=on';

-- echo /* 2.1 non-indexed table access */
call remove_t2_indexes();
-- source include/subselect_mat_cost.inc

-- echo /* 2.2 indexed table access, nullabale columns. */
call make_t2_indexes();
-- source include/subselect_mat_cost.inc

-- echo /* 2.3 indexed table access, non-nullabale columns. */
call set_all_columns_not_null();
-- source include/subselect_mat_cost.inc
call set_all_columns_nullable();


-- echo /******************************************************************************
-- echo 3. Materialization is ON, in-to-exists is OFF, in-to-exists is cheaper.
-- echo ******************************************************************************/
set @@optimizer_switch='materialization=on,in_to_exists=off';
# make IN-TO-EXISTS cheaper
call delete_materialization_data();
call make_t1_indexes();

-- echo /* 3.1 non-indexed table access */
call remove_t2_indexes();
-- source include/subselect_mat_cost.inc

-- echo /* 3.2 indexed table access, nullabale columns. */
call make_t2_indexes();
-- source include/subselect_mat_cost.inc

-- echo /* 3.3 indexed table access, non-nullabale columns. */
call set_all_columns_not_null();
-- source include/subselect_mat_cost.inc
call set_all_columns_nullable();


drop procedure make_t1_indexes;
drop procedure make_t2_indexes;
drop procedure remove_t1_indexes;
drop procedure remove_t2_indexes;
drop procedure add_materialization_data;
drop procedure delete_materialization_data;
drop procedure set_all_columns_not_null;
drop procedure set_all_columns_nullable;
drop table t1, t2, t1_1024, t2_1024;

--echo #
--echo # LP BUG#643424 valgrind warning in choose_subquery_plan()
--echo #

CREATE TABLE t1 (
  pk int(11) NOT NULL AUTO_INCREMENT,
  c1 int(11) DEFAULT NULL,
  c2 int(11) DEFAULT NULL,
  PRIMARY KEY (pk),
  KEY c2 (c2));

INSERT INTO t1 VALUES (1,NULL,2);
INSERT INTO t1 VALUES (2,7,9);
INSERT INTO t1 VALUES (9,NULL,8);

CREATE TABLE t2 (
  pk int(11) NOT NULL AUTO_INCREMENT,
  c1 int(11) DEFAULT NULL,
  c2 int(11) DEFAULT NULL,
  PRIMARY KEY (pk),
  KEY c2 (c2));

INSERT INTO t2 VALUES (1,1,7);

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

SELECT pk FROM t1 WHERE (c2, c1) IN (SELECT c2, c2 FROM t2);

set session optimizer_switch=@save_optimizer_switch;

drop table t1, t2;


--echo #
--echo # LP BUG#652727 Crash in create_ref_for_key()
--echo #

CREATE TABLE t2 (
  pk int(11) NOT NULL AUTO_INCREMENT,
  c1 int(11) DEFAULT NULL,
  PRIMARY KEY (pk));

INSERT INTO t2 VALUES (10,7);
INSERT INTO t2 VALUES (11,1);
INSERT INTO t2 VALUES (17,NULL);

CREATE TABLE t1 (
  pk int(11) NOT NULL AUTO_INCREMENT,
  c1 int(11) DEFAULT NULL,
  PRIMARY KEY (pk));

INSERT INTO t1 VALUES (15,1);
INSERT INTO t1 VALUES (19,NULL);

CREATE TABLE t3 (c2 int(11) DEFAULT NULL, KEY c2 (c2));
INSERT INTO t3 VALUES (1);

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

SELECT c2
FROM t3
WHERE (2, 6) IN (SELECT t1.c1, t1.c1 FROM t1 STRAIGHT_JOIN t2 ON t2.pk = t1.pk);

set session optimizer_switch=@save_optimizer_switch;
drop table t1, t2, t3;