Re: pg_upgrade and toasted pg_largeobject

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Alvaro Herrera <alvherre(at)2ndquadrant(dot)com>
Cc: Robert Haas <robertmhaas(at)gmail(dot)com>, Pg Hackers <pgsql-hackers(at)postgresql(dot)org>, Bruce Momjian <bruce(at)momjian(dot)us>
Subject: Re: pg_upgrade and toasted pg_largeobject
Date: 2016-05-03 20:08:21
Message-ID: 24560.1462306101@sss.pgh.pa.us
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Alvaro Herrera <alvherre(at)2ndquadrant(dot)com> writes:
> Robert Haas wrote:
>> On Tue, May 3, 2016 at 2:09 PM, Alvaro Herrera <alvherre(at)2ndquadrant(dot)com> wrote:
>>> How about backpatching patch 1 all the way back, and putting the others
>>> in 9.6?

>> Why would we do that? It seems very odd to back-patch a pure
>> refactoring - isn't that taking a risk for no benefit?

Yeah, I don't see the point of that either.

> My inclination is actually to put the whole series back to 9.2, but if
> we don't want to do that, then backpatching just the first one seems to
> make pg_upgrade more amenable to future bugfixes.

I checked, and found that patch 1 doesn't apply cleanly before 9.5.
I've not looked into exactly why not, but it would possibly take some
work to adapt these patches to older branches.

regards, tom lane

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