Re: Convert NOT IN sublinks to anti-joins when safe

From: Japin Li <japinli(at)hotmail(dot)com>
To: Richard Guo <guofenglinux(at)gmail(dot)com>
Cc: Pg Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org>
Subject: Re: Convert NOT IN sublinks to anti-joins when safe
Date: 2026-03-09 05:14:38
Message-ID: SY7PR01MB10921F205A15712E60C7CA04FB679A@SY7PR01MB10921.ausprd01.prod.outlook.com
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On Sun, 08 Mar 2026 at 17:16, Richard Guo <guofenglinux(at)gmail(dot)com> wrote:
> On Thu, Mar 5, 2026 at 10:57 AM Japin Li <japinli(at)hotmail(dot)com> wrote:
>> Just a quick note: I think `foreach_ptr` is more appropriate here than `foreach`.
>
> Agreed.
>
> For homogeneous lists, it is better to use foreach_node so we get the
> additional type-safety assertions in dev builds. For heterogeneous
> lists, we should use foreach_ptr.
>
> Attached is an updated version of the patch that replaces foreach with
> foreach_ptr or foreach_node accordingly. Nothing else has changed.
>
> I plan to do one more round of self-review on this. Unless there are
> any further thoughts or concerns, I'm hoping to commit this in a week
> or two. Please let me know if anyone spots anything else I might have
> missed.
>

Thanks for updating the patch. LGTM.

--
Regards,
Japin Li
ChengDu WenWu Information Technology Co., Ltd.

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