Message-ID: <44D98FCF.90408@bluegap.ch>
Date: Wed, 09 Aug 2006 07:33:35 +0000
From: Markus Schiltknecht <markus@bluegap.ch>
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To: alfranio correia junior <alfranio@lsd.di.uminho.pt>
CC: Christopher Browne <cbbrowne@acm.org>,
  pgsql-hackers@postgresql.org
Subject: Re: standard interfaces for replication providers
References: <44D30B31.2070403@lsd.di.uminho.pt>
	<200608041733.24228.jop@lsd.di.uminho.pt>
	<44D70EDA.9060602@bluegap.ch>
	<200608071940.26750.jop@lsd.di.uminho.pt>
	<44D89EA5.5090703@bluegap.ch> <87irl3uqgx.fsf@wolfe.cbbrowne.com>
	<44D8D334.5050808@bluegap.ch> <44D8D9DE.50000@lsd.di.uminho.pt>
In-Reply-To: <44D8D9DE.50000@lsd.di.uminho.pt>
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Hello Alfranio,

alfranio correia junior wrote:
> Of course not...
> It is impossible to build a replication system entirely by only using
> triggers...

Hm, I don't think it's impossible, just unpractical. Anyway, if you say 
so yourself, I really doubt the use of GAPI. If you need to create your 
own hooks anyway beside GAPI, why use GAPI at all? Better have one kind 
of 'hooking' (i.e. with a dynamically loaded library).

> But definitely, there is a set of common requirements among a variety of
> replication systems. Moreover, such requirements are also useful to
> other systems as well.

So far, they are only partly usable for replication. I never looked into 
materialized views or anything else that would benefit from such triggers.

Regards

Markus