Bruce Momjian <bruce@momjian.us> writes:
> Tom Lane wrote:
>> 4. User charlie revokes alice's membership in admin.
>>
>> Now what? Alice's FK constraint is violated, according to the rules
>> KaiGai proposes. Shall REVOKE have to grovel through every table in the
>> database looking for possible violations ... and of course locking the
>> entire DB against writes while it does it? That's not gonna fly. I
>> also note that the failure would expose knowledge of the contents of BT
>> and AT to charlie, which might not be thought desirable either.
> I assume Alice now gets an error on the query that references the
> now-invisible foreign key --- that sounds reasonable to me.
You mean her data just disappears? Doesn't sound very reasonable to me.
regards, tom lane