Re: Planner : anti-join on left joins

From: Richard Guo <guofenglinux(at)gmail(dot)com>
To: Tender Wang <tndrwang(at)gmail(dot)com>
Cc: Nicolas Adenis-Lamarre <nicolas(dot)adenis(dot)lamarre(at)gmail(dot)com>, pgsql-hackers(at)lists(dot)postgresql(dot)org, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Subject: Re: Planner : anti-join on left joins
Date: 2026-02-12 06:42:48
Message-ID: CAMbWs498hXYhNyXvOEKiVNDoacFh-NepqErMBGOnkeqFqBxNaQ@mail.gmail.com
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On Tue, Jan 6, 2026 at 5:23 PM Richard Guo <guofenglinux(at)gmail(dot)com> wrote:
> The logic 'strict for b.z' effectively applies only if b.z happens to
> be the join key b.y. To avoid confusion, I have rephrased the comment
> to make this distinction clear.
>
> I've also included a commit message, refined the comments throughout,
> and added test cases in the updated patch.
>
> Feedback and testing are very welcome.

I've pushed this patch.

- Richard

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