From: Markus Schaber <schabi@logix-tt.com>
To: pgsql-performance@postgresql.org
Subject: Re: Poor performance on very simple query ?
Date: Wed, 04 Oct 2006 19:10:48 +0200
Message-ID: <4523EB18.4040408@logix-tt.com> (raw)
In-Reply-To: <20061003121709.GF30211@oppetid.no>
References: <45224896.7040708@freesurf.fr>
<20061003121004.GC30211@oppetid.no>
<20061003121109.GD30211@oppetid.no>
<45225407.7090805@freesurf.fr>
<20061003121709.GF30211@oppetid.no>
Hi, Tobias,
Tobias Brox wrote:
> How can you have a default value on a primary key?
Just declare the column with both a default value and a primary key
constraint.
It makes sense when the default value is calculated instead of a
constant, by calling a function that generates the key.
In fact, the SERIAL type does nothing but defining a sequence, and then
use nextval('sequencename') as default.
HTH,
Markus
--
Markus Schaber | Logical Tracking&Tracing International AG
Dipl. Inf. | Software Development GIS
Fight against software patents in Europe! www.ffii.org
www.nosoftwarepatents.org
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To: pgsql-performance@postgresql.org
Cc: schabi@logix-tt.com
Subject: Re: Poor performance on very simple query ?
In-Reply-To: <4523EB18.4040408@logix-tt.com>
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