From: Achilleus Mantzios <achill@matrix.gatewaynet.com>
To: Tom Lane <tgl@sss.pgh.pa.us>
Cc: pgsql-sql@postgresql.org
Subject: Re: After Trigger assignment to NEW
Date: Fri, 24 Feb 2006 21:47:51 +0200 (EET)
Message-ID: <Pine.LNX.4.44.0602242138560.20246-100000@matrix.gatewaynet.com> (raw)
In-Reply-To: <3649.1140797162@sss.pgh.pa.us>
O Tom Lane Ýãñáøå óôéò Feb 24, 2006 :
> Achilleus Mantzios <achill@matrix.gatewaynet.com> writes:
> > Is there a reason that the NEW values should remain unchanged in AFTER
> > row triggers?
>
> By definition, an AFTER trigger is too late to change what was stored.
> Use a BEFORE trigger.
Too late if someone wants to store it.
I wanna store the intented original values, thats why i use AFTER trigger.
But i would like to alter what a final AFTER trigger would see.
I'll elabarote a little.
An update happens.
The row is stored.
An after trigger is fired that alters some NEW columns
(nullifies them), aiming for a subsequent trigger
to see the altered results .
It should be something like a pointer to a HeapTuple, (right?),
so that would be feasible i suppose.
I would not even make a post if it was something that trivial.
I hope you get my point.
>
> regards, tom lane
>
> ---------------------------(end of broadcast)---------------------------
> TIP 9: In versions below 8.0, the planner will ignore your desire to
> choose an index scan if your joining column's datatypes do not
> match
>
--
-Achilleus
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: achill@matrix.gatewaynet.com, tgl@sss.pgh.pa.us
Subject: Re: After Trigger assignment to NEW
In-Reply-To: <Pine.LNX.4.44.0602242138560.20246-100000@matrix.gatewaynet.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