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From: Stephen Frost <sfrost@snowman.net>
To: Andres Freund <andres@anarazel.de>
Cc: Tom Lane <tgl@sss.pgh.pa.us>
Cc: Robert Haas <robertmhaas@gmail.com>
Cc: David Fetter <david@fetter.org>
Cc: Ian Barwick <ian.barwick@2ndquadrant.com>
Cc: Tomas Vondra <tomas.vondra@2ndquadrant.com>
Cc: Amit Kapila <amit.kapila16@gmail.com>
Cc: pgsql-hackers@postgresql.org <pgsql-hackers@postgresql.org>
Subject: Re: [PATCH] Stop ALTER SYSTEM from making bad assumptions
Date: Mon, 5 Aug 2019 13:34:39 -0400
Message-ID: <20190805173439.GL29202@tamriel.snowman.net> (raw)
In-Reply-To: <20190805165337.akba75vusf26irku@alap3.anarazel.de>
References: <CAOuzzgpuH+uvT3Yvw5KC=keEqGifSc4eXQ6DB=yrowYyre2YvA@mail.gmail.com>
	<20190803010802.rs3cz2kjq4dl4olu@alap3.anarazel.de>
	<20190803124111.2aaddumd7url5wmq@development>
	<16320.1564851579@sss.pgh.pa.us>
	<d294b0d6-c00b-8a38-864f-4943a9471a6e@2ndquadrant.com>
	<20190805162203.GR31493@fetter.org>
	<4768.1565022305@sss.pgh.pa.us>
	<CA+TgmobXGnq_MqFnD4UnRVWYLrmjVadV_-OtxfxFkA_gpYDqzA@mail.gmail.com>
	<5739.1565023404@sss.pgh.pa.us>
	<20190805165337.akba75vusf26irku@alap3.anarazel.de>

Greetings,

* Andres Freund (andres@anarazel.de) wrote:
> On 2019-08-05 12:43:24 -0400, Tom Lane wrote:
> > On the other hand, people have also opined that they want full error
> > checking on the inserted values, and that seems out of reach with less
> > than a full running system (mumble extensions mumble).
> 
> I think the error checking ought to be about as complete as the one we
> do during a normal postmaster startup. Afaict that requires loading
> shared_preload_library extensions, but does *not* require booting up far
> enough to run GUC checks in a context with database access.

I'm not following this thread of the discussion.

You're not suggesting that pg_basebackup perform this error checking
after it modifies the file, are you..?

Where are you thinking this error checking would be happening?

Thanks,

Stephen

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  Cc: sfrost@snowman.net, andres@anarazel.de, tgl@sss.pgh.pa.us, robertmhaas@gmail.com, david@fetter.org, ian.barwick@2ndquadrant.com, tomas.vondra@2ndquadrant.com, amit.kapila16@gmail.com
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