From: Bruno Wolff III <bruno@wolff.to>
To: Martin Langhoff <martin@catalyst.net.nz>
Cc: PostgreSQL Bugs List <pgsql-bugs@postgresql.org>
Cc: pgsql-sql@postgresql.org
Subject: Re: BUG #1083: Insert query reordering interacts badly with
Date: Fri, 27 Feb 2004 07:46:53 -0600
Message-ID: <20040227134653.GA13683@wolff.to> (raw)
In-Reply-To: <403B2BD4.1060908@catalyst.net.nz>
References: <20040224012657.B86E5CF4A21@www.postgresql.com>
<18400.1077601067@sss.pgh.pa.us>
<403AF354.5030901@catalyst.net.nz>
<18920.1077605515@sss.pgh.pa.us>
<403B2BD4.1060908@catalyst.net.nz>
I am going to try to move this over the sql list, since it doesn't belong
on bugs.
On Tue, Feb 24, 2004 at 23:47:48 +1300,
Martin Langhoff <martin@catalyst.net.nz> wrote:
> Tom Lane wrote:
>
> >How about
> >
> >SELECT nextval('seq'); -- ignore result
> >
> >INSERT INTO ... VALUES (currval('seq'), currval('seq'));
> >
> >
>
> Well, it works for my sample case, I have to agree. Maybe I should
> mention that I tried to boil down the bugreport to the simplest repro
> case I could.
>
> My actual SQL looks roughly like
>
> INSERT INTO destination (record_id, page, row)
> SELECT
> (SELECT record_id FROM record ORDERED BY name),
> (NEXTVAL('seq') / 200),
> (CURRVAL('seq') % 200)
>
> While I have a workaround, I am definitely curious as to whether there
> is actually a way to do it. Thanks for your patience.
I think the following will do what you want:
INSERT INTO destination (record_id, page, row)
SELECT record_id, seq/200, seq%200 FROM
(SELECT record_id, nextval('seq') as seq FROM record ORDERED BY name);
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To: pgsql-sql@postgresql.org
Cc: bruno@wolff.to, martin@catalyst.net.nz, pgsql-bugs@postgresql.org
Subject: Re: BUG #1083: Insert query reordering interacts badly with
In-Reply-To: <20040227134653.GA13683@wolff.to>
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