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create table t1 (c2 int as (1+1), c1 int primary key auto_increment) engine=innodb;
insert into t1(c1) values (null),(null),(null);
select * from t1;
c2 c1
2 1
2 2
2 3
alter table t1 auto_increment = 3;
show create table t1;
Table Create Table
t1 CREATE TABLE `t1` (
`c2` int(11) GENERATED ALWAYS AS (1 + 1) VIRTUAL,
`c1` int(11) NOT NULL AUTO_INCREMENT,
PRIMARY KEY (`c1`)
) ENGINE=InnoDB AUTO_INCREMENT=4 DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci
drop table t1;
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