From: Erik Jones <erik@myemma.com>
To: Josh Trutwin <josh@trutwins.homeip.net>
Cc: pgsql-sql@postgresql.org
Subject: Re: Accessing field of OLD in trigger
Date: Fri, 12 Oct 2007 11:17:51 -0500
Message-ID: <047ADD1A-E9E5-45B6-9200-C6EE230DE451@myemma.com> (raw)
In-Reply-To: <20071012081812.358a9543@prokofiev.trutwins.homeip.net>
References: <Pine.LNX.4.64.0710121158300.560@mazsola.iit.uni-miskolc.hu>
<20071012081812.358a9543@prokofiev.trutwins.homeip.net>
On Oct 12, 2007, at 8:18 AM, Josh Trutwin wrote:
> On Fri, 12 Oct 2007 12:00:55 +0200 (CEST)
> Daniel Drotos <drdani@mazsola.iit.uni-miskolc.hu> wrote:
>
>> Hi,
>>
>>
>> I'm working on a row level plpgsql trigger running after delete,
>> using a 8.0.3 server. It gets a parameter which is a field name of
>> the OLD record. How can that field be accessed?
>>
>> I'd like to do something like:
>>
>> for recvar in 'select OLD.'||quote_ident(TG_ARGV[0])...
>
> I THINK you are out of luck here. I hear it's possible to do but in
> one of the other PL languages say pl/tcl, though I can't seem to find
> an example....
Right, "dynamic variables" aren't available in plpgsql. Check out
any of the other pl languages available if you can.
Erik Jones
Software Developer | Emma®
erik@myemma.com
800.595.4401 or 615.292.5888
615.292.0777 (fax)
Emma helps organizations everywhere communicate & market in style.
Visit us online at http://www.myemma.com
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Reply to all the recipients using the --to and --cc options:
reply via email
To: pgsql-sql@postgresql.org
Cc: erik@myemma.com, josh@trutwins.homeip.net
Subject: Re: Accessing field of OLD in trigger
In-Reply-To: <047ADD1A-E9E5-45B6-9200-C6EE230DE451@myemma.com>
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
This inbox is served by DDX for PostgreSQL; see mirroring instructions
for how to clone and mirror all data and code used for this inbox