drop table if exists t1;
set @org_mode=@@sql_mode;
create table t1
(
`a` tinyint(4) NOT NULL auto_increment,
primary key (`a`)
) engine = 'MYISAM'  ;
set @@sql_mode='strict_all_tables';
insert into t1 values(1000);
ERROR 22003: Out of range value for column 'a' at row 1
select count(*) from t1;
count(*)
0
set auto_increment_increment=1000;
set auto_increment_offset=700;
insert into t1 values(null);
ERROR 22003: Out of range value for column 'a' at row 1
select count(*) from t1;
count(*)
0
set @@sql_mode=@org_mode;
insert into t1 values(null);
Warnings:
Warning	1264	Out of range value for column 'a' at row 1
select * from t1;
a
127
drop table t1;