create or replace table a (
|
cola int(10) primary key,
|
v_cola int(10) as (cola mod 10) virtual,
|
p_cola int(10) as (cola mod 10) persistent
|
);
|
|
create index v_cola on a (v_cola);
|
create index p_cola on a (p_cola);
|
|
create or replace table b(
|
cola int(10),
|
v_cola int(10),
|
p_cola int(10)
|
);
|
|
alter table b add constraint `p_cola_fk`
|
foreign key (p_cola) references a (p_cola)
|
on delete restrict
|
on update restrict;
|
|
alter table b add constraint `v_cola_fk`
|
foreign key (v_cola) references a (v_cola)
|
on delete restrict
|
on update restrict;
|
ERROR 1005 (HY000): Can't create table `test`.`#sql-181_8` (errno: 150 "Foreign key constraint is incorrectly formed")
|
MariaDB [test]> show warnings;
|
+---------+------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
|
| Level | Code | Message |
|
+---------+------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
|
| Warning | 150 | Alter table `test`.`b` with foreign key constraint failed. Parse error in '
|
foreign key (v_cola) references a (v_cola)
|
on delete restrict
|
on update restrict' near 'v_cola)
|
on delete restrict
|
on update restrict'. |
|
| Error | 1005 | Can't create table `test`.`#sql-181_8` (errno: 150 "Foreign key constraint is incorrectly formed") |
|
| Warning | 1215 | Cannot add foreign key constraint |
|
+---------+------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
|
3 rows in set (0.00 sec)
|
|
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http://lists.askmonty.org/pipermail/commits/2017-January/010471.html