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Re: NOLOGGING option, or ?

From: Neil Conway <neilc(at)samurai(dot)com>
To: Alvaro Herrera <alvherre(at)surnet(dot)cl>
Cc: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>,Simon Riggs <simon(at)2ndquadrant(dot)com>, pgsql-hackers(at)postgresql(dot)org
Subject: Re: NOLOGGING option, or ?
Date: 2005-06-01 05:00:04
Message-ID: 1117602004.6678.70.camel@localhost.localdomain (view raw or flat)
Thread:
Lists: pgsql-hackers
On Wed, 2005-06-01 at 00:40 -0400, Alvaro Herrera wrote:
> This doesn't work for COPY, but maybe for CREATE TABLE AS we could log
> the fact that the command was executed, so the replayer could execute
> the same command again.
> 
> Of course, this handwaving doesn't explain how the system in recovery
> mode would be able to execute a full query to reconstruct the table

There's also the typical problem with this kind of approach: how do you
handle non-deterministic queries? (e.g. "CREATE TABLE ... AS SELECT
random(), gettimeofday(), some_func(t1.x) FROM t1 LIMIT 5")

-Neil



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