Re: [HACKERS] Refactor handling of database attributes between pg_dump and pg_dumpall

From: Bruce Momjian <bruce(at)momjian(dot)us>
To: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: Robert Haas <robertmhaas(at)gmail(dot)com>, Haribabu Kommi <kommi(dot)haribabu(at)gmail(dot)com>, Vaishnavi Prabakaran <vaishnaviprabakaran(at)gmail(dot)com>, Michael Paquier <michael(dot)paquier(at)gmail(dot)com>, Thomas Munro <thomas(dot)munro(at)enterprisedb(dot)com>, Peter Eisentraut <peter(dot)eisentraut(at)2ndquadrant(dot)com>, Andreas Karlsson <andreas(at)proxel(dot)se>, "pgsql-hackers(at)postgresql(dot)org" <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: [HACKERS] Refactor handling of database attributes between pg_dump and pg_dumpall
Date: 2018-01-23 15:45:37
Message-ID: 20180123154537.GA15525@momjian.us
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On Sun, Jan 21, 2018 at 11:02:29AM -0500, Tom Lane wrote:
> Bruce Momjian <bruce(at)momjian(dot)us> writes:
> > On Fri, Jan 19, 2018 at 02:54:25PM -0500, Tom Lane wrote:
> >> Command was: DROP DATABASE "template1";
>
> > Uh, the oid of the template1 database is 1, and I assume we would want
> > to preserve that too.
>
> I don't feel any huge attachment to that. In the first place, under
> this proposal recreating template1 is something you would only need to do
> if you weren't satisfied with its default properties as set by initdb.
> Which ought to be a minority of users. In the second place, if you are
> changing those properties from the way initdb set it up, it's not really
> virgin template1 anymore, so why shouldn't it have a new OID?

Oh, I see what you mean. I was just worried that some code might expect
template1 to always have an oid of 1, but we can just call that code
broken.

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Bruce Momjian <bruce(at)momjian(dot)us> http://momjian.us
EnterpriseDB http://enterprisedb.com

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