Re: effective SELECT from child tables - Mailing list pgsql-hackers

From Jim C. Nasby
Subject Re: effective SELECT from child tables
Date
Msg-id 20051001155847.GC40138@pervasive.com
Whole thread Raw
In response to Re: effective SELECT from child tables  (Simon Riggs <simon@2ndquadrant.com>)
List pgsql-hackers
On Sat, Oct 01, 2005 at 09:43:03AM +0100, Simon Riggs wrote:
> On Fri, 2005-09-30 at 18:30 -0500, Jim C. Nasby wrote:
> 
> > 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...)
> 
> You are correct on that point, but IMHO that doesn't change the
> situation sufficiently for the main part of this thread.

Depends on how many tuples and how wide they are. 4 extra bytes over a
couple hundred million rows isn't something to sneeze at. :)
-- 
Jim C. Nasby, Sr. Engineering Consultant      jnasby@pervasive.com
Pervasive Software      http://pervasive.com    work: 512-231-6117
vcard: http://jim.nasby.net/pervasive.vcf       cell: 512-569-9461


pgsql-hackers by date:

Previous
From: Tom Lane
Date:
Subject: Re: [PATCHES] Proposed patch for sequence-renaming problems
Next
From: "Jim C. Nasby"
Date:
Subject: Re: effective SELECT from child tables