Mysql same DB, same query, different users - different error messages On my AWS RDS Mysql 8.0.16 server I have one DB (my-db) and 2 users: the master user (created automatically by RDS) and an app user created by me:
create user if not exists `appuser`@`%` identified by 's3cr3t';
grant all on `my-db`.* to `appuser`@`%`;

When I run the delete from Things where id = 123 query on behalf of the appuser, the error message I get is:

[23000][1217] Cannot delete or update a parent row: a foreign key constraint fails

(1217 and no constraint details)
When I run the same query as a master user, the error message is:

[23000][1451] Cannot delete or update a parent row: a foreign key constraint fails (my-db.Sandwiches, CONSTRAINT SandwichesThingIdFK FOREIGN KEY (thingId) REFERENCES Things (id))

(1451 and there are constraint details)
How do I make appuser get 1451 and all the details?
It looks like this issue is specific to Mysql 8.0.16. I've upgraded to 8.0.21 and I now get 1451 as expected.
Longer answer: 1217 (ER_ROW_IS_REFERENCED) and 1451 (ER_ROW_IS_REFERENCED_2) both describe the same situation. As far as I understand, Mysql will use 1451 if user has a REFERENCES privilege for the table of interest, and 1217 otherwise. And it's the same story about 1216 (ER_NO_REFERENCED_ROW) vs 1452 (ER_NO_REFERENCED_ROW_2).