| From: | Richard Guo <guofenglinux(at)gmail(dot)com> |
|---|---|
| To: | Alexandra Wang <alexandra(dot)wang(dot)oss(at)gmail(dot)com> |
| Cc: | Álvaro Herrera <alvherre(at)kurilemu(dot)de>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Andy Fan <zhihuifan1213(at)163(dot)com>, wenhui qiu <qiuwenhuifx(at)gmail(dot)com> |
| Subject: | Re: Pathify RHS unique-ification for semijoin planning |
| Date: | 2025-08-12 01:43:06 |
| Message-ID: | CAMbWs49MiHSUCgoGKGBws7Xs4hMD8Me7HVkNZ7WuMfNgfC6Z0Q@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Mon, Aug 4, 2025 at 11:08 AM Richard Guo <guofenglinux(at)gmail(dot)com> wrote:
> The v5 patch does not apply anymore, and here is a new rebase. There
> are two main changes in v6:
>
> * I choose to use the check I proposed earlier to determine whether a
> relation has been unique-ified in costsize.c.
>
> * Now that the only call to relation_has_unique_index_for() that
> supplied an exprlist and oprlist has been removed, the loop handling
> those lists is effectively dead code. 0002 removes that loop and
> simplifies the function accordingly.
Does anyone plan to review this patch further? I intend to push it in
two weeks unless there are any objections or additional comments.
Thanks
Richard
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