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mariadb/mysql-test/t/subselect_mat_cost.test
unknown ac6653aacc Fix LP BUG#714999 
Analysis:
The crash in EXPLAIN resulted from an attempt to print the
name of the internal temporary table created to compute
distinct for the innermost subquery of the test case.
Such tables do not have a corresponding TABLE_LIST (table
reference), hence the crash. The reason for this was that
the subquery was executed as part of constant condition
evaluation before EXPLAIN attempts to print the table name.
During the subquery execution, the subquery JOIN_TAB and
its table are substituted by a temporary table in
make_simple_join.

Solution:
Similar to the analogous case for other Items than the
IS NULL function, do not evaluate expensive constant
conditions.
2011-02-10 22:53:30 +02:00

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#
# 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);
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();
insert into t1 values ('1 - 02', '2 - 02', '3 - 02', 2);
-- 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;
--echo #
--echo # LP BUG#641245 Crash in Item_equal::contains
--echo #
CREATE TABLE t1 (
pk int(11) NOT NULL AUTO_INCREMENT,
c1 int(11) DEFAULT NULL,
c2 int(11) DEFAULT NULL,
c3 varchar(1) DEFAULT NULL,
c4 varchar(1) DEFAULT NULL,
PRIMARY KEY (pk),
KEY c2 (c2),
KEY c3 (c3,c2));
INSERT INTO t1 VALUES (10,7,8,'v','v');
INSERT INTO t1 VALUES (11,1,9,'r','r');
INSERT INTO t1 VALUES (12,5,9,'a','a');
create table t1a like t1;
insert into t1a select * from t1;
create table t1b like t1;
insert into t1b select * from t1;
CREATE TABLE t2 (
pk int(11) NOT NULL AUTO_INCREMENT,
c1 int(11) DEFAULT NULL,
c2 int(11) DEFAULT NULL,
c3 varchar(1) DEFAULT NULL,
c4 varchar(1) DEFAULT NULL,
PRIMARY KEY (pk),
KEY c2 (c2),
KEY c3 (c3,c2));
INSERT INTO t2 VALUES (1,NULL,2,'w','w');
INSERT INTO t2 VALUES (2,7,9,'m','m');
set @@optimizer_switch='materialization=off,in_to_exists=on,semijoin=off';
let $query=
SELECT pk
FROM t1
WHERE c1 IN
(SELECT t1a.c1
FROM (t1b JOIN t2 ON t2.c3 = t1b.c4) LEFT JOIN
t1a ON (t1a.c2 = t1b.pk AND 2)
WHERE t1.pk) ;
eval EXPLAIN EXTENDED $query;
eval $query;
DROP TABLE t1, t1a, t1b, t2;
--echo #
--echo # LP BUG#714808 Assertion `outer_lookup_keys <= outer_record_count'
--echo # failed with materialization
CREATE TABLE t1 ( pk int(11), PRIMARY KEY (pk)) ;
CREATE TABLE t2 ( f2 int(11)) ;
CREATE TABLE t3 ( f1 int(11), f3 varchar(1), KEY (f1)) ;
INSERT INTO t3 VALUES (7,'f');
set @@optimizer_switch='materialization=on,in_to_exists=on,semijoin=off';
EXPLAIN
SELECT t1.*
FROM t3 RIGHT JOIN t1 ON t1.pk = t3.f1
WHERE t3.f3 OR ( 3 ) IN ( SELECT f2 FROM t2 );
SELECT t1.*
FROM t3 RIGHT JOIN t1 ON t1.pk = t3.f1
WHERE t3.f3 OR ( 3 ) IN ( SELECT f2 FROM t2 );
drop table t1,t2,t3;
--echo #
--echo # LP BUG#714999 Second crash in select_describe() with nested subqueries
--echo #
CREATE TABLE t1 ( pk int(11)) ;
INSERT INTO t1 VALUES (29);
CREATE TABLE t2 ( f1 varchar(1)) ;
INSERT INTO t2 VALUES ('f'),('d');
CREATE TABLE t3 ( f2 varchar(1)) ;
EXPLAIN SELECT f2 FROM t3 WHERE (
SELECT MAX( pk ) FROM t1
WHERE EXISTS (
SELECT DISTINCT f1
FROM t2
)
) IS NULL ;
drop table t1, t2;
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