Re: Updates of SE-PostgreSQL 8.4devel patches

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Bruce Momjian <bruce(at)momjian(dot)us>
Cc: Robert Haas <robertmhaas(at)gmail(dot)com>, KaiGai Kohei <kaigai(at)ak(dot)jp(dot)nec(dot)com>, pgsql-hackers(at)postgresql(dot)org
Subject: Re: Updates of SE-PostgreSQL 8.4devel patches
Date: 2008-09-26 02:19:52
Message-ID: 5317.1222395592@sss.pgh.pa.us
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Bruce Momjian <bruce(at)momjian(dot)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

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