mariadb/mysql-test/t/delete.test

#
# Check for problems with delete
#

drop table if exists t1;
CREATE TABLE t1 (a tinyint(3), b tinyint(5));
INSERT INTO t1 VALUES (1,1);
INSERT LOW_PRIORITY INTO t1 VALUES (1,2);
INSERT INTO t1 VALUES (1,3);
DELETE from t1 where a=1 limit 1;
DELETE LOW_PRIORITY from t1 where a=1;

INSERT INTO t1 VALUES (1,1);
DELETE from t1;
LOCK TABLE t1 write;
INSERT INTO t1 VALUES (1,2);
DELETE from t1;
UNLOCK TABLES;
INSERT INTO t1 VALUES (1,2);
SET AUTOCOMMIT=0;
DELETE from t1;
SET AUTOCOMMIT=1;
drop table t1;

#
# Test of delete when the delete will cause a node to disappear and reappear
# (This assumes a block size of 1024)
#

create table t1 (a bigint not null, primary key (a,a,a,a,a,a,a,a,a,a));
insert into t1 values (2),(4),(6),(8),(10),(12),(14),(16),(18),(20),(22),(24),(26),(23);
delete from t1 where a=26;
drop table t1;
create table t1 (a bigint not null, primary key (a,a,a,a,a,a,a,a,a,a));
insert into t1 values (2),(4),(6),(8),(10),(12),(14),(16),(18),(20),(22),(24),(26),(23),(27);
delete from t1 where a=27;
drop table t1;

#
# CHAR(0) bug - not actually DELETE bug, but anyway...
#

CREATE TABLE t1 (
  bool     char(0) default NULL,
  not_null varchar(20) binary NOT NULL default '',
  misc     integer not null,
  PRIMARY KEY  (not_null)
) TYPE=MyISAM;

INSERT INTO t1 VALUES (NULL,'a',4), (NULL,'b',5), (NULL,'c',6), (NULL,'d',7);

select * from t1 where misc > 5 and bool is null;
delete   from t1 where misc > 5 and bool is null;
select * from t1 where misc > 5 and bool is null;

select count(*) from t1;
delete from t1 where 1 > 2;
select count(*) from t1;
delete from t1 where 3 > 2;
select count(*) from t1;

drop table t1;

#
# Bug #5733: Table handler error with self-join multi-table DELETE
#

create table t1 (a int not null auto_increment primary key, b char(32));
insert into t1 (b) values ('apple'), ('apple');
select * from t1;
delete t1 from t1, t1 as t2 where t1.b = t2.b and t1.a > t2.a;
select * from t1;
drop table t1;

#
# Bug #8392: delete with ORDER BY containing a direct reference to the table 
#
 
CREATE TABLE t1 ( a int PRIMARY KEY );
DELETE FROM t1 WHERE t1.a > 0 ORDER BY t1.a;
INSERT INTO t1 VALUES (0),(1),(2);
DELETE FROM t1 WHERE t1.a > 0 ORDER BY t1.a LIMIT 1;
SELECT * FROM t1;
DROP TABLE t1;