Re: Partial Mode in Aggregate Functions

From: Andreas Karlsson <andreas(at)proxel(dot)se>
To: David Rowley <dgrowleyml(at)gmail(dot)com>, "David G(dot) Johnston" <david(dot)g(dot)johnston(at)gmail(dot)com>
Cc: Marcos Pegoraro <marcos(at)f10(dot)com(dot)br>, PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org>
Subject: Re: Partial Mode in Aggregate Functions
Date: 2026-02-27 08:49:13
Message-ID: ff016564-b5c6-461a-9df3-a03eacf37753@proxel.se
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On 2/27/26 5:34 AM, David Rowley wrote:
> I'll stand by what I said earlier, that if people don't know what
> partial aggregation is that we should aim to better explain what it
> is. Renaming it won't magically inform people what it is and will
> likely just confuse all the people who already know what it is. I
> think you're about 10 years too late to bikeshed names for this.

+1

There is nothing wrong with calling them partial aggregates. No name is
likely to never confuse anyone and I do not see any big issue with
partial in particular. Both parallel and batch, as suggested in this
thread, would be worse.

--
Andreas Karlsson
Percona

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