From: Scott Marlowe <smarlowe@g2switchworks.com>
To: Aaron Bono <postgresql@aranya.com>
Cc: pgsql-sql@postgresql.org
Subject: Re: query to select a linked list
Date: Wed, 09 May 2007 13:04:01 -0500
Message-ID: <1178733840.7497.59.camel@state.g2switchworks.com> (raw)
In-Reply-To: <bf05e51c0705090629l7232a6d2we87170b2168c1c82@mail.gmail.com>
References: <20070509125520.GA17497@apartia.fr>
<bf05e51c0705090629l7232a6d2we87170b2168c1c82@mail.gmail.com>
On Wed, 2007-05-09 at 08:29, Aaron Bono wrote:
> On 5/9/07, Louis-David Mitterrand <vindex+lists-pgsql-sql@apartia.org>
> wrote:
> Hi,
>
> To build a threaded forum application I came up the following
> schema:
>
> forum
> ------
> id_forum | integer| not null default
> nextval('forum_id_forum_seq'::regclass)
> id_parent| integer|
> subject | text | not null
> message | text |
>
> Each message a unique id_forum and an id_parent pointing to
> the replied
> post (empty if first post).
>
> How can I build an elegant query to select all messages in a
> thread?
>
> Thanks,
>
> Unlike Oracle, PostgreSQL doesn't have anything like a connect by so
> you would need to write your own stored procedure for that (if new
> versions of PostgreSQL will have connect by, let me know guys).
Take a look at the tablefunc in contrib, that seems to provide
connectby. I've only ever used the crosstab functions in there, but I
can't see what would have broken in connectby with 8.2 or anything.
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To: pgsql-sql@postgresql.org
Cc: smarlowe@g2switchworks.com, postgresql@aranya.com
Subject: Re: query to select a linked list
In-Reply-To: <1178733840.7497.59.camel@state.g2switchworks.com>
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