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Re: [PATCH] Lazy xid assingment V2

From: Alvaro Herrera <alvherre(at)commandprompt(dot)com>
To: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: "Florian G(dot) Pflug" <fgp(at)phlo(dot)org>, Postgresql-Hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: [PATCH] Lazy xid assingment V2
Date: 2007-09-01 02:51:30
Message-ID: 20070901025130.GY8046@alvh.no-ip.org (view raw or flat)
Thread:
Lists: pgsql-hackers
Tom Lane wrote:

> I note that pg_description defines xid_age as "age of a transaction ID,
> in transactions before current transaction", and I'm content to stick
> with that definition.  Even if it does force consuming an XID.  I'm not
> sure that we could devise a comparably succinct description of any of
> these other proposed behaviors, nor that we should even consider
> changing that description.

Hmm, what happens if somebody calls 
select age(xmin) from bigtable
?

-- 
Alvaro Herrera                                http://www.CommandPrompt.com/
The PostgreSQL Company - Command Prompt, Inc.

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