delete.test

视频监控网络部分的协议ddns,的模块的实现代码,请大家大胆指正.

#
# Check for problems with delete
#

--disable_warnings
drop table if exists t1,t2,t3,t11,t12;
--enable_warnings
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,
	b bigint not null default 0,
	c bigint not null default 0,
	d bigint not null default 0,
	e bigint not null default 0,
	f bigint not null default 0,
	g bigint not null default 0,
	h bigint not null default 0,
	i bigint not null default 0,
	j bigint not null default 0,
	primary key (a,b,c,d,e,f,g,h,i,j));
insert into t1 (a) 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,
	b bigint not null default 0,
	c bigint not null default 0,
	d bigint not null default 0,
	e bigint not null default 0,
	f bigint not null default 0,
	g bigint not null default 0,
	h bigint not null default 0,
	i bigint not null default 0,
	j bigint not null default 0,
	primary key (a,b,c,d,e,f,g,h,i,j));
insert into t1 (a) 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;

CREATE TABLE `t1` (
  `i` int(10) NOT NULL default '0',
  `i2` int(10) NOT NULL default '0',
  PRIMARY KEY  (`i`)
);
-- error 1054
DELETE FROM t1 USING t1 WHERE post='1';
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)
) ENGINE=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;

#
# IGNORE option
#
create table t11 (a int NOT NULL, b int, primary key (a));
create table t12 (a int NOT NULL, b int, primary key (a));
create table t2 (a int NOT NULL, b int, primary key (a));
insert into t11 values (0, 10),(1, 11),(2, 12);
insert into t12 values (33, 10),(0, 11),(2, 12);
insert into t2 values (1, 21),(2, 12),(3, 23);
select * from t11;
select * from t12;
select * from t2;
-- error 1242
delete t11.*, t12.* from t11,t12 where t11.a = t12.a and t11.b <> (select b from t2 where t11.a < t2.a);
select * from t11;
select * from t12;
delete ignore t11.*, t12.* from t11,t12 where t11.a = t12.a and t11.b <> (select b from t2 where t11.a < t2.a);
select * from t11;
select * from t12;
insert into t11 values (2, 12);
-- error 1242
delete from t11 where t11.b <> (select b from t2 where t11.a < t2.a);
select * from t11;
delete ignore from t11 where t11.b <> (select b from t2 where t11.a < t2.a);
select * from t11;
drop table t11, t12, t2;

#
# Bug #4198: deletion and KEYREAD
#

create table t1 (a int, b int, unique key (a), key (b));
insert into t1 values (3, 3), (7, 7);
delete t1 from t1 where a = 3;
check table t1;
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;

#
# Bug #21392: multi-table delete with alias table name fails with 
# 1003: Incorrect table name
#

create table t1 (a int);
delete `4.t1` from t1 as `4.t1` where `4.t1`.a = 5;
delete FROM `4.t1` USING t1 as `4.t1` where `4.t1`.a = 5;
drop table t1;

#
# Bug#17711: DELETE doesn't use index when ORDER BY, LIMIT and
#            non-restricting WHERE is present.
#
create table t1(f1 int primary key);
insert into t1 values (4),(3),(1),(2);
delete from t1 where (@a:= f1) order by f1 limit 1;
select @a;
drop table t1;

# BUG#30385 "Server crash when deleting with order by and limit"
CREATE TABLE t1 (
  `date` date ,
  `time` time ,
  `seq` int(10) unsigned NOT NULL auto_increment,
  PRIMARY KEY  (`seq`),
  KEY `seq` (`seq`),
  KEY `time` (`time`),
  KEY `date` (`date`)
);
DELETE FROM t1 ORDER BY date ASC, time ASC LIMIT 1;
drop table t1;

--echo End of 4.1 tests

#
# Test of multi-delete where we are not scanning the first table
#

CREATE TABLE t1 (a int not null,b int not null);
CREATE TABLE t2 (a int not null, b int not null, primary key (a,b));
CREATE TABLE t3 (a int not null, b int not null, primary key (a,b));
insert into t1 values (1,1),(2,1),(1,3);
insert into t2 values (1,1),(2,2),(3,3);
insert into t3 values (1,1),(2,1),(1,3);
select * from t1,t2,t3 where t1.a=t2.a AND t2.b=t3.a and t1.b=t3.b;
explain select * from t1,t2,t3 where t1.a=t2.a AND t2.b=t3.a and t1.b=t3.b;
delete t2.*,t3.* from t1,t2,t3 where t1.a=t2.a AND t2.b=t3.a and t1.b=t3.b;
# This should be empty
select * from t3;
drop table t1,t2,t3;

#
# Bug #8143: deleting '0000-00-00' values using IS NULL
#

create table t1(a date not null);
insert into t1 values (0);
select * from t1 where a is null;
delete from t1 where a is null;
select count(*) from t1;
drop table t1;

#
# Bug #26186: delete order by, sometimes accept unknown column
#
CREATE TABLE t1 (a INT); INSERT INTO t1 VALUES (1);

--error ER_BAD_FIELD_ERROR
DELETE FROM t1 ORDER BY x;

# even columns from a table not used in query (and not even existing)
--error ER_BAD_FIELD_ERROR
DELETE FROM t1 ORDER BY t2.x;

# subquery (as long as the subquery from is valid or DUAL)
--error ER_BAD_FIELD_ERROR
DELETE FROM t1 ORDER BY (SELECT x);

DROP TABLE t1;

#
# Bug #30234: Unexpected behavior using DELETE with AS and USING
# '
CREATE TABLE t1 (
  a INT
);

CREATE TABLE t2 (
  a INT
);

CREATE DATABASE db1;
CREATE TABLE db1.t1 (
  a INT
);
INSERT INTO db1.t1 (a) SELECT * FROM t1;

CREATE DATABASE db2;
CREATE TABLE db2.t1 (
  a INT
);
INSERT INTO db2.t1 (a) SELECT * FROM t2;

--error ER_PARSE_ERROR
DELETE FROM t1 alias USING t1, t2 alias WHERE t1.a = alias.a;
DELETE FROM alias USING t1, t2 alias WHERE t1.a = alias.a;
DELETE FROM t1, alias USING t1, t2 alias WHERE t1.a = alias.a;
--error ER_UNKNOWN_TABLE
DELETE FROM t1, t2 USING t1, t2 alias WHERE t1.a = alias.a;
--error ER_PARSE_ERROR
DELETE FROM db1.t1 alias USING db1.t1, db2.t1 alias WHERE db1.t1.a = alias.a;
--error ER_UNKNOWN_TABLE
DELETE FROM alias USING db1.t1, db2.t1 alias WHERE db1.t1.a = alias.a;
DELETE FROM db2.alias USING db1.t1, db2.t1 alias WHERE db1.t1.a = alias.a;
DELETE FROM t1 USING t1 WHERE a = 1;
SELECT * FROM t1;
--error ER_PARSE_ERROR
DELETE FROM t1 alias USING t1 alias WHERE a = 2;
SELECT * FROM t1;

DROP TABLE t1, t2;
DROP DATABASE db1;
DROP DATABASE db2;