Subject: Re: Triggers using PL/pgSQL
From: Ken Hill <ken@scottshill.com>
Reply-To: ken@scottshill.com
To: Thusitha Kodikara <kthusi@yahoo.com>
Cc: pgsql-sql@postgresql.org
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Organization: Scotts Hill Associates, Inc.
Date: Mon, 31 Jul 2006 08:47:50 -0700
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On Sun, 2006-07-30 at 21:16 -0700, Thusitha Kodikara wrote:
> Hello,
> 
> I am interested in developing some triggers to keep track of records
> that are changed (possibly the changes of one or more specific
> columns). In addition to keeping the new values, I also need to keep
> the old values (may be on a separate table).  
> 
> Though I  have done similar things in other RDBMs using SQL, I find
> doing this in Postgres, a little bit complicated - may be because it
> needs to be done through a separate procedural language and through a
> separate function. The Postgres documentation also didn't provide much
> help ( the examples in C). I was mainly looking for example showing
> how to refer 'OLD' and 'NEW' rows using PL/pgSQL.
> 
> Can someone please direct me to some such examples?
> 
> Thanks and regards,
> -Thusitha

I too am very interested in this!

-Ken