| From: | James Coleman <jtc331(at)gmail(dot)com> |
|---|---|
| To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
| Cc: | Andres Freund <andres(at)anarazel(dot)de>, pgsql-hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: execExprInterp() questions / How to improve scalar array op expr eval? |
| Date: | 2020-04-11 20:58:45 |
| Message-ID: | CAAaqYe-EkDewXXZ-Cdu_-r5D49x6Yf5_rA5tsO_Z5ezxmTgOeA@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Sat, Apr 11, 2020 at 3:57 PM James Coleman <jtc331(at)gmail(dot)com> wrote:
> ..
> > It seems like this might be somewhat related to the currently-moribund
> > patch to allow caching of the values of stable subexpressions from
> > one execution to the next. If we had that infrastructure you could
> > imagine extending it to allow caching the expanded not flat form of
> > some datums. Again I'm not entirely sure what would drive the choice.
>
> I'll have to look into that patch to see if it sparks any ideas (or if
> it's worth working on for its own merits).
Is this the patch [1] you're thinking of?
James
[1]: https://www.postgresql.org/message-id/flat/da87bb6a014e029176a04f6e50033cfb%40postgrespro.ru
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