Re: query optimizer

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Luca Ferrari <fluca1978(at)infinito(dot)it>
Cc: pgsql-general(at)postgresql(dot)org
Subject: Re: query optimizer
Date: 2007-07-21 04:21:10
Message-ID: 20230.1184991670@sss.pgh.pa.us
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Luca Ferrari <fluca1978(at)infinito(dot)it> writes:
>> src/backend/optimizer/README

> I've read this yesterday, very interesting, but I'm looking for something
> similar related to geqo. I mean, is there any presentation/demo that
> step-y-step explains how geqo could take decisions?

There's not a lot, but I just made a few improvements here and here:
http://developer.postgresql.org/pgdocs/postgres/planner-optimizer.html
http://developer.postgresql.org/pgdocs/postgres/geqo-pg-intro.html

Beyond that, the GEQO chapter provides several references, and IMHO
you should not be all that resistant to looking into the source code.
Even if you don't read C well, many of the files provide a wealth of
info in the comments.

regards, tom lane

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