| From: | Robert Haas <robertmhaas(at)gmail(dot)com> |
|---|---|
| To: | Peter Eisentraut <peter(dot)eisentraut(at)enterprisedb(dot)com> |
| Cc: | Tomas Vondra <tomas(dot)vondra(at)enterprisedb(dot)com>, "David G(dot) Johnston" <david(dot)g(dot)johnston(at)gmail(dot)com>, pgsql-hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: unlogged sequences |
| Date: | 2022-04-01 17:41:53 |
| Message-ID: | CA+TgmoaPV3s3xL-ajMm3NuxWA9VWkcBUvmVaSt9-bua=ESFgRQ@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Fri, Apr 1, 2022 at 12:31 PM Peter Eisentraut
<peter(dot)eisentraut(at)enterprisedb(dot)com> wrote:
> > An "internal" dependency means that the internal object shouldn't really
> > be operated on directly. (In some cases it's allowed for convenience.)
> > So I think in that case the sequence must follow the table's persistence
> > in all cases. This is accomplished by setting the initial persistence
> > to the table's, making ALTER TABLE propagate persistence changes, and
> > prohibiting direct ALTER SEQUENCE SET.
>
> But to make pg_upgrade work for identity sequences of unlogged tables,
> we need to allow ALTER SEQUENCE ... SET LOGGED on such sequences. Which
> I guess is not a real problem in the end.
And I think also SET UNLOGGED, since it would be weird IMHO to make
such a change irreversible.
--
Robert Haas
EDB: http://www.enterprisedb.com
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