| From: | Robert Haas <robertmhaas(at)gmail(dot)com> |
|---|---|
| To: | Arne Roland <arne(dot)roland(at)malkut(dot)net> |
| Cc: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Ashutosh Bapat <ashutosh(dot)bapat(dot)oss(at)gmail(dot)com>, Andrei Lepikhov <lepihov(at)gmail(dot)com>, Jakub Wartak <jakub(dot)wartak(at)enterprisedb(dot)com>, PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org>, Julien Rouhaud <rjuju123(at)gmail(dot)com>, Etsuro Fujita <etsuro(dot)fujita(at)gmail(dot)com>, Richard Guo <guofenglinux(at)gmail(dot)com> |
| Subject: | Re: apply_scanjoin_target_to_paths and partitionwise join |
| Date: | 2025-10-29 18:55:21 |
| Message-ID: | CA+Tgmoawi-6gizOGPmR6v=GcyS8njvgED1HoW8q_=XJtMwKpZA@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Wed, Oct 29, 2025 at 2:06 PM Arne Roland <arne(dot)roland(at)malkut(dot)net> wrote:
> This virtually equivalent query issue occurs when the join condition is
> (almost) unique. The different amount of tuples to process clearly
> occurs when they are not.
I'm having trouble interpreting this. If it's important, please
clarify and show an example.
--
Robert Haas
EDB: http://www.enterprisedb.com
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