set default_storage_engine=innodb;
create table t1 (id int primary key, id2 int as (id) virtual, key id2 (id2));
create table t2 (id int key, constraint fk_id foreign key (id) references t1 (id) on delete cascade);
insert into t1 (id) values (1), (2);
insert into t2 (id) values (1), (2);
delete from t1;
select * from t1;
id	id2
select * from t2;
id
drop table t2;
drop table t1;