1
drop table if exists t1;
2
drop table if exists t2;
4
create table t1 (a int not null auto_increment,b int, primary key (a)) engine=myisam auto_increment=3;
5
insert into t1 values (1,1),(NULL,3),(NULL,4);
6
delete from t1 where a=4;
7
insert into t1 values (NULL,5),(NULL,6);
14
delete from t1 where a=6;
15
replace t1 values (3,1);
16
ALTER TABLE t1 add c int;
17
replace t1 values (3,3,3);
18
insert into t1 values (NULL,7,7);
19
update t1 set a=8,b=b+1,c=c+1 where a=7;
20
insert into t1 values (NULL,9,9);
30
skey tinyint unsigned NOT NULL auto_increment PRIMARY KEY,
33
insert into t1 values (NULL, "hello");
34
insert into t1 values (NULL, "hey");
39
select _rowid,t1._rowid,skey,sval from t1;
40
_rowid _rowid skey sval
44
create table t1 (a char(10) not null, b int not null auto_increment, primary key(a,b));
45
insert into t1 values ("a",1),("b",2),("a",2),("c",1);
46
insert into t1 values ("a",NULL),("b",NULL),("c",NULL),("e",NULL);
47
insert into t1 (a) values ("a"),("b"),("c"),("d");
48
insert into t1 (a) values ('k'),('d');
49
insert into t1 (a) values ("a");
50
insert into t1 values ("d",last_insert_id());
70
create table t1 (ordid int(8) not null auto_increment, ord varchar(50) not null, primary key (ordid), index(ord,ordid));
71
insert into t1 (ordid,ord) values (NULL,'sdj'),(NULL,'sdj');
77
create table t1 (ordid int(8) not null auto_increment, ord varchar(50) not null, primary key (ord,ordid));
78
insert into t1 values (NULL,'sdj'),(NULL,'sdj'),(NULL,"abc"),(NULL,'abc'),(NULL,'zzz'),(NULL,'sdj'),(NULL,'abc');
89
create table t1 (sid char(5), id int(2) NOT NULL auto_increment, key(sid, id));
90
create table t2 (sid char(20), id int(2));
91
insert into t2 values ('skr',NULL),('skr',NULL),('test',NULL);
92
insert into t1 select * from t2;
99
create table t1 (a int not null primary key auto_increment);
100
insert into t1 values (0);
106
Table Op Msg_type Msg_text
107
test.t1 check warning Found row where the auto_increment column has the value 0
108
test.t1 check status OK
110
create table t1 (a int not null auto_increment primary key);
111
insert into t1 values (NULL);
112
insert into t1 values (-1);
113
select last_insert_id();
116
insert into t1 values (NULL);
123
create table t1 (a int not null auto_increment primary key) /*!40102 engine=heap */;
124
insert into t1 values (NULL);
125
insert into t1 values (-1);
126
select last_insert_id();
129
insert into t1 values (NULL);
136
create table t1 (i tinyint unsigned not null auto_increment primary key);
137
insert into t1 set i = 254;
138
insert into t1 set i = null;
139
select last_insert_id();
142
explain extended select last_insert_id();
143
id select_type table type possible_keys key key_len ref rows filtered Extra
144
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL No tables used
146
Note 1003 select last_insert_id() AS `last_insert_id()`
147
insert into t1 set i = 254;
148
ERROR 23000: Duplicate entry '254' for key 'PRIMARY'
149
select last_insert_id();
152
insert into t1 set i = null;
153
ERROR 23000: Duplicate entry '255' for key 'PRIMARY'
154
select last_insert_id();
158
create table t1 (i tinyint unsigned not null auto_increment, key (i));
159
insert into t1 set i = 254;
160
insert into t1 set i = null;
161
select last_insert_id();
164
insert into t1 set i = null;
166
Warning 1264 Out of range value for column 'i' at row 1
167
select last_insert_id();
171
create table t1 (i tinyint unsigned not null auto_increment primary key, b int, unique (b));
172
insert into t1 values (NULL, 10);
173
select last_insert_id();
176
insert into t1 values (NULL, 15);
177
select last_insert_id();
180
insert into t1 values (NULL, 10);
181
ERROR 23000: Duplicate entry '10' for key 'b'
182
select last_insert_id();
186
create table t1(a int auto_increment,b int null,primary key(a));
187
SET SQL_MODE=NO_AUTO_VALUE_ON_ZERO;
188
insert into t1(a,b)values(NULL,1);
189
insert into t1(a,b)values(200,2);
190
insert into t1(a,b)values(0,3);
191
insert into t1(b)values(4);
192
insert into t1(b)values(5);
193
insert into t1(b)values(6);
194
insert into t1(b)values(7);
195
select * from t1 order by b;
204
alter table t1 modify b mediumint;
205
select * from t1 order by b;
214
create table t2 (a int);
215
insert t2 values (1),(2);
216
alter table t2 add b int auto_increment primary key;
222
delete from t1 where a=0;
223
update t1 set a=0 where b=5;
224
select * from t1 order by b;
232
delete from t1 where a=0;
233
update t1 set a=NULL where b=6;
234
ERROR 23000: Column 'a' cannot be null
235
update t1 set a=300 where b=7;
237
insert into t1(a,b)values(NULL,8);
238
insert into t1(a,b)values(400,9);
239
insert into t1(a,b)values(0,10);
240
insert into t1(b)values(11);
241
insert into t1(b)values(12);
242
insert into t1(b)values(13);
243
insert into t1(b)values(14);
244
select * from t1 order by b;
258
delete from t1 where a=0;
259
update t1 set a=0 where b=12;
260
select * from t1 order by b;
274
delete from t1 where a=0;
275
update t1 set a=NULL where b=13;
276
ERROR 23000: Column 'a' cannot be null
277
update t1 set a=500 where b=14;
278
select * from t1 order by b;
292
create table t1 (a bigint);
293
insert into t1 values (1), (2), (3), (NULL), (NULL);
294
alter table t1 modify a bigint not null auto_increment primary key;
303
create table t1 (a bigint);
304
insert into t1 values (1), (2), (3), (0), (0);
305
alter table t1 modify a bigint not null auto_increment primary key;
314
create table t1 (a bigint);
315
insert into t1 values (0), (1), (2), (3);
316
set sql_mode=NO_AUTO_VALUE_ON_ZERO;
317
alter table t1 modify a bigint not null auto_increment primary key;
326
create table t1 (a int auto_increment primary key , b int null);
327
set sql_mode=NO_AUTO_VALUE_ON_ZERO;
328
insert into t1 values (0,1),(1,2),(2,3);
335
alter table t1 modify b varchar(255);
336
insert into t1 values (0,4);
344
CREATE TABLE t1 ( a INT AUTO_INCREMENT, b BLOB, PRIMARY KEY (a,b(10)));
345
INSERT INTO t1 (b) VALUES ('aaaa');
347
Table Op Msg_type Msg_text
348
test.t1 check status OK
349
INSERT INTO t1 (b) VALUES ('');
351
Table Op Msg_type Msg_text
352
test.t1 check status OK
353
INSERT INTO t1 (b) VALUES ('bbbb');
355
Table Op Msg_type Msg_text
356
test.t1 check status OK
357
DROP TABLE IF EXISTS t1;
359
t1_name VARCHAR(255) DEFAULT NULL,
360
t1_id INT(10) UNSIGNED NOT NULL AUTO_INCREMENT,
363
) AUTO_INCREMENT = 1000;
364
INSERT INTO t1 (t1_name) VALUES('MySQL');
365
INSERT INTO t1 (t1_name) VALUES('MySQL');
366
INSERT INTO t1 (t1_name) VALUES('MySQL');
372
SHOW CREATE TABLE `t1`;
374
t1 CREATE TABLE `t1` (
375
`t1_name` varchar(255) DEFAULT NULL,
376
`t1_id` int(10) unsigned NOT NULL AUTO_INCREMENT,
377
PRIMARY KEY (`t1_id`),
378
KEY `t1_name` (`t1_name`)
379
) ENGINE=MyISAM AUTO_INCREMENT=1003 DEFAULT CHARSET=latin1
381
create table t1(a int not null auto_increment primary key);
382
create table t2(a int not null auto_increment primary key, t1a int);
383
insert into t1 values(NULL);
384
insert into t2 values (NULL, LAST_INSERT_ID()), (NULL, LAST_INSERT_ID());
385
insert into t1 values (NULL);
386
insert into t2 values (NULL, LAST_INSERT_ID()), (NULL, LAST_INSERT_ID()),
387
(NULL, LAST_INSERT_ID());
388
insert into t1 values (NULL);
389
insert into t2 values (NULL, LAST_INSERT_ID()), (NULL, LAST_INSERT_ID()),
390
(NULL, LAST_INSERT_ID()), (NULL, LAST_INSERT_ID());
404
CREATE TABLE t1 ( `a` int(11) NOT NULL auto_increment, `b` int(11) default NULL,PRIMARY KEY (`a`),UNIQUE KEY `b` (`b`));
405
insert into t1 (b) values (1);
406
replace into t1 (b) values (2), (1), (3);
413
insert into t1 (b) values (1);
414
replace into t1 (b) values (2);
415
replace into t1 (b) values (1);
416
replace into t1 (b) values (3);
423
create table t1 (rowid int not null auto_increment, val int not null,primary
424
key (rowid), unique(val));
425
replace into t1 (val) values ('1'),('2');
426
replace into t1 (val) values ('1'),('2');
427
insert into t1 (val) values ('1'),('2');
428
ERROR 23000: Duplicate entry '1' for key 'val'
434
create table t1 (a int not null auto_increment primary key, val int);
435
insert into t1 (val) values (1);
436
update t1 set a=2 where a=1;
437
insert into t1 (val) values (1);
443
CREATE TABLE t1 (t1 INT(10) PRIMARY KEY, t2 INT(10));
444
INSERT INTO t1 VALUES(0, 0);
445
INSERT INTO t1 VALUES(1, 1);
446
ALTER TABLE t1 CHANGE t1 t1 INT(10) auto_increment;
447
ERROR 23000: ALTER TABLE causes auto_increment resequencing, resulting in duplicate entry '1' for key 'PRIMARY'
449
create table t1 (a int primary key auto_increment, b int, c int, d timestamp default current_timestamp, unique(b),unique(c));
450
insert into t1 values(null,1,1,now());
451
insert into t1 values(null,0,0,null);
452
replace into t1 values(null,1,0,null);
453
select last_insert_id();