| From: | Andy Fan <zhihui(dot)fan1213(at)gmail(dot)com> |
|---|---|
| To: | David Rowley <dgrowleyml(at)gmail(dot)com> |
| Cc: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Alvaro Herrera <alvherre(at)alvh(dot)no-ip(dot)org>, Andres Freund <andres(at)anarazel(dot)de>, PostgreSQL Developers <pgsql-hackers(at)lists(dot)postgresql(dot)org> |
| Subject: | Re: Hybrid Hash/Nested Loop joins and caching results from subplans |
| Date: | 2020-12-05 14:52:45 |
| Message-ID: | CAKU4AWq_K950aYpzLMH5DtYX=5a03dmYgEkeEq0jTcvBQbWnNQ@mail.gmail.com |
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| Lists: | pgsql-hackers |
Thanks for working on the new version.
On Fri, Dec 4, 2020 at 10:41 PM David Rowley <dgrowleyml(at)gmail(dot)com> wrote:
>
> I also
> noticed that the code I'd written to build the cache lookup expression
> included a step to deform the outer tuple. This was unnecessary and
> slowed down the expression evaluation.
>
>
I thought it would be something like my 3rd suggestion on [1], however after
I read the code, it looked like no. Could you explain what changes it is?
I probably missed something.
--
Best Regards
Andy Fan
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