Re: Window Function "Run Conditions"

From: David Rowley <dgrowleyml(at)gmail(dot)com>
To: Zhihong Yu <zyu(at)yugabyte(dot)com>
Cc: Andy Fan <zhihui(dot)fan1213(at)gmail(dot)com>, Andres Freund <andres(at)anarazel(dot)de>, PostgreSQL Developers <pgsql-hackers(at)lists(dot)postgresql(dot)org>
Subject: Re: Window Function "Run Conditions"
Date: 2022-04-07 14:11:06
Message-ID: CAApHDvq=UfYDnEB5eBEXjsNg-HvpFazZYSGbTzqp9iGicgMqww@mail.gmail.com
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On Thu, 7 Apr 2022 at 19:01, David Rowley <dgrowleyml(at)gmail(dot)com> wrote:
>
> On Thu, 7 Apr 2022 at 15:41, Zhihong Yu <zyu(at)yugabyte(dot)com> wrote:
> > + * We must keep the original qual in place if there is a
> > + * PARTITION BY clause as the top-level WindowAgg remains in
> > + * pass-through mode and does nothing to filter out unwanted
> > + * tuples.
> > + */
> > + *keep_original = false;
> >
> > The comment talks about keeping original qual but the assignment uses the value false.
> > Maybe the comment can be rephrased so that it matches the assignment.
>
> Thanks. I've just removed that comment locally now. You're right, it
> was out of date.

I've attached the updated patch with the fixed comment and a few other
comments reworded slightly.

I've also pgindented the patch.

Barring any objection, I'm planning to push this one in around 10 hours time.

David

Attachment Content-Type Size
v7-0001-Teach-planner-and-executor-about-monotonic-window.patch text/plain 78.5 KB

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