CREATE TABLE t1 (
id INT AUTO_INCREMENT,
PRIMARY KEY(id)
) ENGINE=NDBCLUSTER;
CREATE TABLE t2 (
id INT AUTO_INCREMENT,
KEY(id)
) ENGINE=NDBCLUSTER;
ERROR HY000: Can't create table 't2'
SHOW WARNINGS;
Level	Code	Message
Warning	1296	Got error 4335 'Only one autoincrement column allowed per table. Having a table without primary key uses an autoincr' from NDB
Error	1005	Can't create table 't2'
SHOW TABLES;
Tables_in_test
t1
CREATE TABLE t3 (
id INT AUTO_INCREMENT,
KEY(id)
) ENGINE=MYISAM;
ALTER TABLE t3
ENGINE NDBCLUSTER;
ERROR HY000: Can't create destination table for copying alter table
SHOW WARNINGS;
Level	Code	Message
Warning	1296	Got error 4335 'Only one autoincrement column allowed per table. Having a table without primary key uses an autoincr' from NDB
Error	1005	Can't create destination table for copying alter table
SHOW CREATE TABLE t3;
Table	Create Table
t3	CREATE TABLE `t3` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  KEY `id` (`id`)
) ENGINE=MyISAM DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci
ALTER TABLE t3
ADD PRIMARY KEY (id);
SHOW CREATE TABLE t3;
Table	Create Table
t3	CREATE TABLE `t3` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  PRIMARY KEY (`id`),
  KEY `id` (`id`)
) ENGINE=MyISAM DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci
DROP TABLE t1, t3;
set @@auto_increment_increment=4;
set @@auto_increment_offset=1;
set @@ndb_autoincrement_prefetch_sz=2;
create table t1 (a int unsigned not null primary key auto_increment)
engine ndb;
insert into t1 values ();
insert into t1 values (2);
insert into t1 values ();
insert into t1 values ();
select * from t1 order by a;
a
1
2
5
9
drop table t1;
set @@auto_increment_increment=2;
set @@auto_increment_offset=1;
First look at default SE behaviour on manual insert unaligned with
offset + step
create table t1 (a int unsigned not null primary key auto_increment);
show variables like 'LAST_INSERT_ID';
Variable_name	Value
last_insert_id	9
insert into t1 values();
show variables like 'LAST_INSERT_ID';
Variable_name	Value
last_insert_id	1
insert into t1 values(18);
show variables like 'LAST_INSERT_ID';
Variable_name	Value
last_insert_id	1
insert into t1 values();
show variables like 'LAST_INSERT_ID';
Variable_name	Value
last_insert_id	19
insert into t1 values();
show variables like 'LAST_INSERT_ID';
Variable_name	Value
last_insert_id	21
insert into t1 values();
show variables like 'LAST_INSERT_ID';
Variable_name	Value
last_insert_id	23
insert into t1 values(22);
show variables like 'LAST_INSERT_ID';
Variable_name	Value
last_insert_id	23
insert into t1 values();
show variables like 'LAST_INSERT_ID';
Variable_name	Value
last_insert_id	25
insert into t1 values(28);
show variables like 'LAST_INSERT_ID';
Variable_name	Value
last_insert_id	25
insert into t1 values();
show variables like 'LAST_INSERT_ID';
Variable_name	Value
last_insert_id	29
insert into t1 values();
show variables like 'LAST_INSERT_ID';
Variable_name	Value
last_insert_id	31
select * from t1 order by a;
a
1
18
19
21
22
23
25
28
29
31
drop table t1;