Re: Rules/Triggers executio order

From: "Jim C(dot) Nasby" <jim(at)nasby(dot)net>
To: Benjamin Krajmalnik <kraj(at)illumen(dot)com>
Cc: pgsql-admin(at)postgresql(dot)org
Subject: Re: Rules/Triggers executio order
Date: 2006-10-19 04:27:38
Message-ID: 20061019042738.GD71084@nasby.net
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On Wed, Oct 18, 2006 at 06:42:21PM -0600, Benjamin Krajmalnik wrote:
> I have a partitioned table to which I route data using a trigger.
> I am changing it to use a set of rules which executes "INSTEAD" on
> insert.
> The parent table currently has a trigger.
>
> The system is a live system. I would prefer to not have to suspend the
> data flow.
> If I create the rules, and given the fact that they execute "INSTEAD" of
> the insertion into the parent table, will the trigger still execute.
> I will be removing the trigger immediately after the creation of the
> rules, but just want to be safe and make sure I get no duplicate
> entries.

An INSTEAD OF rule replaces the query that you originally had with the
one re-written by the rule, so no, the triggers shouldn't fire. But you
should test to make sure.
--
Jim Nasby jim(at)nasby(dot)net
EnterpriseDB http://enterprisedb.com 512.569.9461 (cell)

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