| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | James Coleman <jtc331(at)gmail(dot)com> |
| 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 21:03:50 |
| Message-ID: | 1294.1586639030@sss.pgh.pa.us |
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| Lists: | pgsql-hackers |
James Coleman <jtc331(at)gmail(dot)com> writes:
>>> 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.
> Is this the patch [1] you're thinking of?
> [1]: https://www.postgresql.org/message-id/flat/da87bb6a014e029176a04f6e50033cfb%40postgrespro.ru
Yeah. I was just digging for that in the archives, and also came across
this older patch:
which doesn't seem to have gone anywhere but might still contain
useful ideas.
regards, tom lane
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