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Re: Fwd: Start up question about triggers

From: Richard Broersma Jr <rabroersma(at)yahoo(dot)com>
To: Aaron Bono <postgresql(at)aranya(dot)com>, pgsql-sql(at)postgresql(dot)org
Subject: Re: Fwd: Start up question about triggers
Date: 2006-06-23 05:09:30
Message-ID: 20060623050930.29801.qmail@web31801.mail.mud.yahoo.com (view raw or flat)
Thread:
Lists: pgsql-sql
> I did some research and can't even find a way to get meta data in a trigger.
> 
> In a trigger, is there a way to inspect OLD and NEW to see what columns are
> there and see what has changed?  If so, you may not be able to grab the
> actual query but you could create a generic trigger that reconstructs a
> possible update/insert/delete for any table in your database.
> 
> Does anyone know of a good place to go get information about using meta data
> in a stored procedure or trigger?

yes.
See the section "User Comments" at the very bottom of Chapter 33 after "Writing Trigger Functions
in C".  It is odd that a PL_PGSQL example is given at the end a chapter for triggers written in C.

http://www.postgresql.org/docs/8.1/interactive/trigger-example.html

Also see the entire chapter 36.10 "Trigger Procedures"
http://www.postgresql.org/docs/8.1/interactive/plpgsql-trigger.html

Hope this is what you are looking for.

Regards,

Richard Broersma Jr.

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Next:From: Forums @ ExistanzeDate: 2006-06-23 07:15:22
Subject: Re: Fwd: Start up question about triggers
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Subject: Fwd: Start up question about triggers

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