From: | Louis-David Mitterrand <cunctator(at)apartia(dot)ch> |
---|---|
To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
Cc: | pgsql-sql(at)hub(dot)org |
Subject: | Re: knowing which columns have beend UPDATEd inside a TRIGGER? |
Date: | 2000-10-25 06:23:20 |
Message-ID: | 20001025082320.A1941@styx |
Views: | Raw Message | Whole Thread | Download mbox | Resend email |
Thread: | |
Lists: | pgsql-novice pgsql-sql |
On Tue, Oct 24, 2000 at 06:51:03PM -0400, Tom Lane wrote:
> Louis-David Mitterrand <cunctator(at)apartia(dot)ch> writes:
> > Is there a way to know which columns are being UPDATEd or INSERTEd from
> > inside a trigger, either in C or pl/pgsql?
>
> Huh? An INSERT always inserts all columns, by definition. Some of them
> might be null and/or equal to their default values, but they're all
> there.
*slap* Doh! Thanks for clearing up my mind about this ;-)
> For an UPDATE, you could check to see whether old.col = new.col.
> This would miss the case where an UPDATE command is explicitly setting
> a column to the same value it already had; dunno if you care or not.
That is so obvious I didn't think about it, and it's exactly what I
need.
Thanks a lot,
--
Louis-David Mitterrand - ldm(at)apartia(dot)org - http://www.apartia.org
Hi. This is my friend, Jack Shit, and you don't know him.
From | Date | Subject | |
---|---|---|---|
Next Message | Tomas Berndtsson | 2000-10-25 07:21:52 | Re: knowing which columns have beend UPDATEd inside a TRIGGER? |
Previous Message | S.A.Pamungkas | 2000-10-25 04:46:58 | connect DB from remote |
From | Date | Subject | |
---|---|---|---|
Next Message | Tomas Berndtsson | 2000-10-25 07:21:52 | Re: knowing which columns have beend UPDATEd inside a TRIGGER? |
Previous Message | Carolyn Lu Wong | 2000-10-25 05:03:10 | quote in function |