From: | "Jim C(dot) Nasby" <jnasby(at)pervasive(dot)com> |
---|---|
To: | Simon Riggs <simon(at)2ndquadrant(dot)com> |
Cc: | Ilia Kantor <ilia(at)obnovlenie(dot)ru>, pgsql-hackers(at)postgresql(dot)org |
Subject: | Re: effective SELECT from child tables |
Date: | 2005-09-30 23:30:10 |
Message-ID: | 20050930233010.GR40138@pervasive.com |
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Lists: | pgsql-hackers |
On Wed, Sep 28, 2005 at 07:25:46PM +0100, Simon Riggs wrote:
> Include the Discriminator as a column in A and it will be inherited by
> all A1, A2, A3.
> e.g. concrete_class char(1) not null
<snip>
> This will add 1 byte per row in your superclass... and requires no
I thought char was actually stored variable-length...? I know there's a
type that actually acts like char does on most databases, but I can't
remember what it is off-hand (it should be mentioned in docs 8.3...)
--
Jim C. Nasby, Sr. Engineering Consultant jnasby(at)pervasive(dot)com
Pervasive Software http://pervasive.com work: 512-231-6117
vcard: http://jim.nasby.net/pervasive.vcf cell: 512-569-9461
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