Re: FK triggers misused? - Mailing list pgsql-performance

From Andrew - Supernews
Subject Re: FK triggers misused?
Date
Msg-id slrnf258g3.10cj.andrew+nonews@atlantis.supernews.net
Whole thread Raw
In response to FK triggers misused?  (cluster <skrald@amossen.dk>)
Responses Re: FK triggers misused?  (cluster <skrald@amossen.dk>)
List pgsql-performance
On 2007-04-15, Tom Lane <tgl@sss.pgh.pa.us> wrote:
> Andrew - Supernews <andrew+nonews@supernews.com> writes:
>> Looking at current CVS code the RI check seems to be skipped on update of
>> the _referred to_ table if the old and new values match, but not on update
>> of the _referring_ table.
>
> No, both sides are supposed to be tested, see lines 3350-3395 in
> src/backend/commands/trigger.c.  Or do you see something broken there?
> It works for me in a quick test.

Hm, you're right; I was looking at the logic in the triggers themselves
(in ri_triggers.c).

So the next question is, what pg version is the original poster using?
because 8.1.x doesn't report trigger execution times, and 8.2.x would use
a single bitmap index scan with an = ANY condition, not a BitmapOr.

--
Andrew, Supernews
http://www.supernews.com - individual and corporate NNTP services

pgsql-performance by date:

Previous
From: Tom Lane
Date:
Subject: Re: FK triggers misused?
Next
From: "Merlin Moncure"
Date:
Subject: Re: Basic Q on superfluous primary keys