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.
-- Bruce Momjian <bruce@momjian.us> http://momjian.us EnterpriseDB
http://enterprisedb.com
+ If your life is a hard drive, Christ can be your backup. +