Re: Redundant Result node

Richard Guo <guofenglinux@gmail.com>

From: Richard Guo <guofenglinux@gmail.com>

To: Ranier Vilela <ranier.vf@gmail.com>

Cc: PostgreSQL-development <pgsql-hackers@postgresql.org>

Date: 2024-08-27T03:43:02Z

Lists: pgsql-hackers

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Avoid unnecessary post-sort projection
- 9626068f1333 18.0 landed

On Thu, Aug 22, 2024 at 9:02 PM Ranier Vilela <ranier.vf@gmail.com> wrote:
> Em qui., 22 de ago. de 2024 às 04:34, Richard Guo <guofenglinux@gmail.com> escreveu:
>> This does not seem right to me, as PathTargets are not canonical, so
>> we cannot guarantee that two identical PathTargets will have the same
>> pointer.  Actually, for the query above, the two PathTargets are
>> identical but have different pointers.
>
> Could memcmp solve this?

Hmm, I don't think memcmp works for nodes that contain pointers.

Thanks
Richard