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--source include/have_innodb.inc

create table t(id int primary key, a int) engine=InnoDB;
insert into t (id, a) values (1, 1);
alter table t modify column id int auto_increment;
check table t;
insert into t (a) values (2);
alter table t modify column id int, algorithm=instant;
check table t;
insert into t (id, a) values (3, 3);
select * from t;
check table t;
drop table t;