Re: execExprInterp() questions / How to improve scalar array op expr eval? - Mailing list pgsql-hackers

James Coleman <jtc331@gmail.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:

https://www.postgresql.org/message-id/CABRT9RBdRFS8sQNsJHxZOhC0tJe1x2jnomiz%3DFOhFkS07yRwQA%40mail.gmail.com

which doesn't seem to have gone anywhere but might still contain
useful ideas.

            regards, tom lane