Re: GSoC idea - Simulated annealing to search for query plans

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Grzegorz Parka <grzegorz(dot)parka(at)gmail(dot)com>
Cc: "ktm(at)rice(dot)edu" <ktm(at)rice(dot)edu>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: GSoC idea - Simulated annealing to search for query plans
Date: 2015-03-18 17:03:23
Message-ID: 27204.1426698203@sss.pgh.pa.us
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Grzegorz Parka <grzegorz(dot)parka(at)gmail(dot)com> writes:
> I'm thinking of testing and improving SAIO as an extension before reaching
> a satisfactory quality of code and returned plans.

> Would then the destination be the /contrib and then main source tree or
> would it ever stay as an extension?

I'd like to push it into the main tree, replacing GEQO, if as we suspect
it turns out to dominate GEQO on speed/plan quality. There's no reason
not to test it in the manner you describe though.

regards, tom lane

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