Re: Support "Right Semi Join" plan shapes

Richard Guo <guofenglinux@gmail.com>

From: Richard Guo <guofenglinux@gmail.com>

To: Li Japin <japinli@hotmail.com>

Cc: Alena Rybakina <lena.ribackina@yandex.ru>, wenhui qiu <qiuwenhuifx@gmail.com>, PostgreSQL-development <pgsql-hackers@postgresql.org>, vignesh C <vignesh21@gmail.com>

Date: 2024-07-04T09:17:41Z

Lists: pgsql-hackers

Commits

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Support "Right Semi Join" plan shapes
- aa86129e19d7 18.0 landed
Fix neqjoinsel's behavior for semi/anti join cases.
- 7ca25b7de6ae 11.0 cited

Attachments

v8-0001-Support-Right-Semi-Join-plan-shapes.patch (application/octet-stream) patch v8-0001

On Fri, Jun 28, 2024 at 3:21 PM Richard Guo <guofenglinux@gmail.com> wrote:
> On Fri, Jun 28, 2024 at 2:54 PM Richard Guo <guofenglinux@gmail.com> wrote:
> > I've refined this test case further to make it more stable by using an
> > additional filter 'a.tenthous < 5000'.  Besides, I noticed a surplus
> > blank line in ExecHashJoinImpl().  I've removed it in the v7 patch.
>
> BTW, I've also verified the empty-rel optimization for hash join and
> AFAICT it works correctly for the new right-semi join.

Here is a new rebase.

Barring objections, I'm planning to push it soon.

Thanks
Richard