Re: Column storage positions

From: Alvaro Herrera <alvherre(at)commandprompt(dot)com>
To: Kris Jurka <books(at)ejurka(dot)com>
Cc: Zeugswetter Andreas ADI SD <ZeugswetterA(at)spardat(dot)at>, Phil Currier <pcurrier(at)gmail(dot)com>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Andrew Dunstan <andrew(at)dunslane(dot)net>, pgsql-hackers(at)postgresql(dot)org
Subject: Re: Column storage positions
Date: 2007-02-22 19:10:01
Message-ID: 20070222191001.GP4276@alvh.no-ip.org
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Kris Jurka escribió:
>
>
> On Thu, 22 Feb 2007, Alvaro Herrera wrote:
>
> >Zeugswetter Andreas ADI SD escribió:
> >>
> >>I agree, I haven't thought of drop column :-( Drop column should have
> >>relabeled attnum. Since it was not done then, my comments are probably
> >>moot.
> >
> >We can correct this problem now.
>
> How? If attnum is serving as both physical position and logical order,
> how can you make it be logical position without breaking physical
> position?

By patching the code, of course, so that it doesn't serves as both
things, which is what is being discussed.

--
Alvaro Herrera http://www.CommandPrompt.com/
PostgreSQL Replication, Consulting, Custom Development, 24x7 support

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