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Re: TwoPO: experimental join order algorithm

From: Adriano Lange <alange0001(at)gmail(dot)com>
To: Robert Haas <robertmhaas(at)gmail(dot)com>
Cc: Pg Hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: TwoPO: experimental join order algorithm
Date: 2010-07-25 22:45:39
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Lists: pgsql-hackers
Em 25-07-2010 17:44, Robert Haas escreveu:
> On Sat, Jul 24, 2010 at 9:20 AM, Adriano Lange <alange0001(at)gmail(dot)com> wrote:
>> I'd like to release the last version of my experimental join order
>> algorithm (TwoPO - Two Phase Optimization [1]):
>> This algorithm is not production-ready, but an experimental set of
>> ideas, which need to be refined and evaluated. As the join order
>> optimization is a hard problem, the evaluation of a search strategy is
>> also a hard task. Therefore, I think the most important TODO item
>> related to replacement of GEQO algorithm is to define a set of
>> evaluation criteria considered as relevant.
> As you may know, we're in the middle of a CommitFest right now; I'd
> suggest adding this patch to the next one.
> Someone might have time to look at it sooner, but at least if you add
> it here we'll not lose track of it.

Yes, I know. This is only a notice, not a patch.
As I said, this algorithm is experimental, which do not match with the
CommitFest life cycle.

Adriano Lange

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