Subject: Re: WIP: Faster Expression Processing v4
To: Andres Freund <andres@anarazel.de>
References: <20161206034955.bh33paeralxbtluv@alap3.anarazel.de>
 <20170209003312.rr7atqepgbrf4xqe@alap3.anarazel.de>
 <20170307030137.lpo4japv5oqgbqpz@alap3.anarazel.de>
 <2950633b-f0f5-aba1-fb97-99d096f29da0@2ndquadrant.com>
 <20170310194021.ek4bs4bl2khxkmll@alap3.anarazel.de>
Cc: pgsql-hackers@postgresql.org, Heikki Linnakangas <hlinnaka@iki.fi>,
 Doug Doole <ddoole@salesforce.com>
From: Peter Eisentraut <peter.eisentraut@2ndquadrant.com>
Organization: 2ndQuadrant
Message-ID: <c05c01e6-21e4-4ac2-7c8e-e20d4a342506@2ndquadrant.com>
Date: Fri, 10 Mar 2017 19:15:59 -0500
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.12; rv:45.0)
 Gecko/20100101 Thunderbird/45.7.1
MIME-Version: 1.0
In-Reply-To: <20170310194021.ek4bs4bl2khxkmll@alap3.anarazel.de>
Content-Type: text/plain; charset=windows-1252
Content-Transfer-Encoding: 7bit
Precedence: bulk
Sender: pgsql-hackers-owner@postgresql.org

On 3/10/17 14:40, Andres Freund wrote:
> I'd really like to get it in.  The performance improvements on its own
> are significant, and it provides the basis for significantly larger
> improvements again (JIT) - those followup improvements are large patches
> again though, so I'd rather not do all of that next cycle.
> 
> My next step (over the weekend) is to add tests to execQual.c to get it
> a good chunk closer to 100% test coverage, and then do the same for the
> new implementation (there's probably very little additional tests needed
> after the conversion).  Given all tests pass before/after, and there's a
> lot of them, I think we can have a reasonable confidence of a low bug
> density.

That seems like a plan, but now would probably be a good time for some
other hackers to take note of this proposal.

-- 
Peter Eisentraut              http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services


-- 
Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org)
To make changes to your subscription:
http://www.postgresql.org/mailpref/pgsql-hackers