From: Tom Lane <tgl@sss.pgh.pa.us>
To: Robert Haas <robertmhaas@gmail.com>
cc: Andres Freund <andres@anarazel.de>,
        Peter Eisentraut <peter.eisentraut@2ndquadrant.com>,
        Andrey Klychkov <aaklychkov@mail.ru>,
        Victor Yegorov <vyegorov@gmail.com>,
        PostgreSQL Hackers <pgsql-hackers@postgresql.org>
Subject: Re: Alter index rename concurrently to
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Comments: In-reply-to Robert Haas <robertmhaas@gmail.com>
	message dated "Thu, 02 Aug 2018 15:57:13 -0400"
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Date: Thu, 02 Aug 2018 16:29:36 -0400
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Robert Haas <robertmhaas@gmail.com> writes:
> On Wed, Aug 1, 2018 at 3:36 PM, Andres Freund <andres@anarazel.de> wrote:
>> What precisely are you proposing?

> Inserting AcceptInvalidationMessages() in some location that
> guarantees it will be executed at least once per SQL statement.  I
> tentatively propose the beginning of parse_analyze(), but I am open to
> suggestions.

What will that accomplish that the existing call in transaction start
doesn't?  It might make the window for concurrency issues a bit narrower,
but it certainly doesn't close it.

			regards, tom lane