mirror of
https://github.com/MariaDB/server.git
synced 2025-01-18 13:02:28 +01:00
137 lines
5.1 KiB
Text
137 lines
5.1 KiB
Text
#
|
|
# Check null keys
|
|
|
|
drop table if exists t1;
|
|
create table t1 (a int, b int not null,unique key (a,b),index(b)) type=myisam;
|
|
insert ignore into t1 values (1,1),(2,2),(3,3),(4,4),(5,5),(6,6),(null,7),(9,9),(8,8),(7,7),(null,9),(null,9),(6,6);
|
|
explain select * from t1 where a is null;
|
|
explain select * from t1 where a is null and b = 2;
|
|
explain select * from t1 where a is null and b = 7;
|
|
explain select * from t1 where a=2 and b = 2;
|
|
explain select * from t1 where a<=>b limit 2;
|
|
explain select * from t1 where (a is null or a > 0 and a < 3) and b < 5 limit 3;
|
|
explain select * from t1 where (a is null or a = 7) and b=7;
|
|
explain select * from t1 where (a is null and b>a) or a is null and b=7 limit 2;
|
|
explain select * from t1 where a is null and b=9 or a is null and b=7 limit 3;
|
|
explain select * from t1 where a > 1 and a < 3 limit 1;
|
|
explain select * from t1 where a > 8 and a < 9;
|
|
select * from t1 where a is null;
|
|
select * from t1 where a is null and b = 7;
|
|
select * from t1 where a<=>b limit 2;
|
|
select * from t1 where (a is null or a > 0 and a < 3) and b < 5 limit 3;
|
|
select * from t1 where (a is null or a > 0 and a < 3) and b > 7 limit 3;
|
|
select * from t1 where (a is null or a = 7) and b=7;
|
|
select * from t1 where a is null and b=9 or a is null and b=7 limit 3;
|
|
alter table t1 modify b blob not null, add c int not null, drop key a, add unique key (a,b(20),c), drop key b, add key (b(10));
|
|
explain select * from t1 where a is null and b = 2;
|
|
explain select * from t1 where a is null and b = 2 and c=0;
|
|
explain select * from t1 where a is null and b = 7 and c=0;
|
|
explain select * from t1 where a=2 and b = 2;
|
|
explain select * from t1 where a<=>b limit 2;
|
|
explain select * from t1 where (a is null or a > 0 and a < 3) and b < 5 and c=0 limit 3;
|
|
explain select * from t1 where (a is null or a = 7) and b=7 and c=0;
|
|
explain select * from t1 where (a is null and b>a) or a is null and b=7 limit 2;
|
|
explain select * from t1 where a is null and b=9 or a is null and b=7 limit 3;
|
|
explain select * from t1 where a > 1 and a < 3 limit 1;
|
|
explain select * from t1 where a is null and b=7 or a > 1 and a < 3 limit 1;
|
|
explain select * from t1 where a > 8 and a < 9;
|
|
explain select * from t1 where b like "6%";
|
|
select * from t1 where a is null;
|
|
select * from t1 where a is null and b = 7 and c=0;
|
|
select * from t1 where a<=>b limit 2;
|
|
select * from t1 where (a is null or a > 0 and a < 3) and b < 5 limit 3;
|
|
select * from t1 where (a is null or a > 0 and a < 3) and b > 7 limit 3;
|
|
select * from t1 where (a is null or a = 7) and b=7 and c=0;
|
|
select * from t1 where a is null and b=9 or a is null and b=7 limit 3;
|
|
select * from t1 where b like "6%";
|
|
drop table t1;
|
|
|
|
|
|
#
|
|
# The following failed for Matt Loschert
|
|
#
|
|
|
|
DROP TABLE IF EXISTS t1,t2;
|
|
CREATE TABLE t1 (
|
|
id int(10) unsigned NOT NULL auto_increment,
|
|
uniq_id int(10) unsigned default NULL,
|
|
PRIMARY KEY (id),
|
|
UNIQUE KEY idx1 (uniq_id)
|
|
) TYPE=MyISAM;
|
|
|
|
CREATE TABLE t2 (
|
|
id int(10) unsigned NOT NULL auto_increment,
|
|
uniq_id int(10) unsigned default NULL,
|
|
PRIMARY KEY (id)
|
|
) TYPE=MyISAM;
|
|
|
|
INSERT INTO t1 VALUES (1,NULL),(2,NULL),(3,1),(4,2),(5,NULL),(6,NULL),(7,3),(8,4),(9,NULL),(10,NULL);
|
|
INSERT INTO t2 VALUES (1,NULL),(2,NULL),(3,1),(4,2),(5,NULL),(6,NULL),(7,3),(8,4),(9,NULL),(10,NULL);
|
|
|
|
#
|
|
# Check IS NULL optimization
|
|
#
|
|
explain select id from t1 where uniq_id is null;
|
|
explain select id from t1 where uniq_id =1;
|
|
#
|
|
# Check updates
|
|
#
|
|
UPDATE t1 SET id=id+100 where uniq_id is null;
|
|
UPDATE t2 SET id=id+100 where uniq_id is null;
|
|
select id from t1 where uniq_id is null;
|
|
select id from t2 where uniq_id is null;
|
|
#
|
|
# Delete all records from each table where the uniq_id field is null
|
|
#
|
|
DELETE FROM t1 WHERE uniq_id IS NULL;
|
|
DELETE FROM t2 WHERE uniq_id IS NULL;
|
|
#
|
|
# Select what is left -- notice the difference
|
|
#
|
|
SELECT * FROM t1 ORDER BY uniq_id, id;
|
|
SELECT * FROM t2 ORDER BY uniq_id, id;
|
|
DROP table t1,t2;
|
|
|
|
#
|
|
# This crashed MySQL 3.23.47
|
|
#
|
|
|
|
CREATE TABLE `t1` (
|
|
`order_id` char(32) NOT NULL default '',
|
|
`product_id` char(32) NOT NULL default '',
|
|
`product_type` int(11) NOT NULL default '0',
|
|
PRIMARY KEY (`order_id`,`product_id`,`product_type`)
|
|
) TYPE=MyISAM;
|
|
CREATE TABLE `t2` (
|
|
`order_id` char(32) NOT NULL default '',
|
|
`product_id` char(32) NOT NULL default '',
|
|
`product_type` int(11) NOT NULL default '0',
|
|
PRIMARY KEY (`order_id`,`product_id`,`product_type`)
|
|
) TYPE=MyISAM;
|
|
INSERT INTO t1 (order_id, product_id, product_type) VALUES
|
|
('3d7ce39b5d4b3e3d22aaafe9b633de51',1206029, 3),
|
|
('3d7ce39b5d4b3e3d22aaafe9b633de51',5880836, 3),
|
|
('9d9aad7764b5b2c53004348ef8d34500',2315652, 3);
|
|
INSERT INTO t2 (order_id, product_id, product_type) VALUES
|
|
('9d9aad7764b5b2c53004348ef8d34500',2315652, 3);
|
|
|
|
select t1.* from t1
|
|
left join t2 using(order_id, product_id, product_type)
|
|
where t2.order_id=NULL;
|
|
select t1.* from t1
|
|
left join t2 using(order_id, product_id, product_type)
|
|
where t2.order_id is NULL;
|
|
drop table t1,t2;
|
|
|
|
#
|
|
# The last select returned wrong results in 3.23.52
|
|
#
|
|
|
|
create table t1 (id int);
|
|
insert into t1 values (null), (0);
|
|
create table t2 (id int);
|
|
insert into t2 values (null);
|
|
select * from t1, t2 where t1.id = t2.id;
|
|
alter table t1 add key id (id);
|
|
select * from t1, t2 where t1.id = t2.id;
|
|
drop table t1,t2;
|