Re: pg11+: pg_ls_*dir LIMIT 1: temporary files .. not closed atend-of-transaction

Nitpick: please see c4dcd9144ba6.

> From: Justin Pryzby <pryzbyj@telsasoft.com>
> Date: Wed, 11 Mar 2020 10:09:18 -0500
> Subject: [PATCH] SRF: avoid leaking resources if not run to completion
> 
> Change to return a tuplestore populated immediately and returned in full.
> 
> Discussion: https://www.postgresql.org/message-id/20200308173103.GC1357%40telsasoft.com

I wonder if this isn't saying that the whole value-per-call protocol is
bogus, in that it seems impossible to write a useful function with it.
Maybe we should add one final call with a special flag "function
shutdown" or something, so that these resources can be released if the
SRF isn't run to completion?

-- 
Álvaro Herrera                https://www.2ndQuadrant.com/
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