From: Alvaro Herrera <alvherre@2ndquadrant.com>
To: Peter Eisentraut <peter.eisentraut@2ndquadrant.com>
Cc: pgsql-docs <pgsql-docs@postgresql.org>
Subject: Re: NOTIFY man page still recommends rules
Date: Tue, 2 Aug 2016 13:31:17 -0400
Message-ID: <20160802173117.GA554886@alvherre.pgsql> (raw)
In-Reply-To: <913aa238-04c7-a75f-28e6-8845119eb3df@2ndquadrant.com>
List-Unsubscribe: <mailto:majordomo@postgresql.org?body=unsub%20pgsql-docs>
Peter Eisentraut wrote:
> The NOTIFY man page writes
>
> When <command>NOTIFY</command> is used to signal the occurrence of
> changes
> to a particular table, a useful programming technique is to put the
> <command>NOTIFY</command> in a rule that is triggered by table updates.
>
> Is using rules here still best practice? This was probably written
> before statement triggers were available.
>
> Even if yes, we might want to explain why, since we generally discourage
> rule use otherwise.
I think it's easier to dodge the rules topic entirely here and just
mention statement triggers. Using rules you cannot cover the truncate
case, for instance.
--
Álvaro Herrera http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services
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To: pgsql-docs@postgresql.org
Cc: alvherre@2ndquadrant.com, peter.eisentraut@2ndquadrant.com
Subject: Re: NOTIFY man page still recommends rules
In-Reply-To: <20160802173117.GA554886@alvherre.pgsql>
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