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In-Reply-To: 
 <CAMbWs48qOOfBV6svQgbdzZ4HbTV18jsjyFD_b6ofJQfAt5n11w@mail.gmail.com>
From: Robert Haas <robertmhaas@gmail.com>
Date: Wed, 8 Oct 2025 10:45:12 -0400
Message-ID: 
 <CA+TgmoZ0KR2_XCWHy17=HHcQ3p2Mamc9c6Dnnhf1J6wPYFD9ng@mail.gmail.com>
Subject: Re: Eager aggregation, take 3
To: Richard Guo <guofenglinux@gmail.com>
Cc: David Rowley <dgrowleyml@gmail.com>, Tom Lane <tgl@sss.pgh.pa.us>,
	Tender Wang <tndrwang@gmail.com>, Paul George <p.a.george19@gmail.com>,
	Andy Fan <zhihuifan1213@163.com>,
	PostgreSQL-development <pgsql-hackers@postgresql.org>,
 pgsql-hackers@lists.postgresql.org,
	Matheus Alcantara <matheusssilv97@gmail.com>
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Precedence: bulk

On Tue, Oct 7, 2025 at 6:57=E2=80=AFAM Richard Guo <guofenglinux@gmail.com>=
 wrote:
> > 10. I don't think this comment quite makes sense:
> >
> >  * "apply_at" tracks the lowest join level at which partial aggregation=
 is
> >  * applied.
> >
> > maybe "minimum set of rels to join before partial aggregation can be ap=
plied"?
> I've updated the comment for apply_at to clarify that it refers to the
> relids at which partial aggregation is applied.
>
> I've also updated the comments within RelAggInfo to use one-line
> style.
>
> I retained the name of this field though.

For what it's worth, I also don't like that field name. I'm not sure
what to propose instead, but I don't think apply_at is very clear.

--=20
Robert Haas
EDB: http://www.enterprisedb.com