Robert Haas <robertmh...@gmail.com> writes: > On Wed, Feb 29, 2012 at 2:33 PM, Heikki Linnakangas > <heikki.linnakan...@enterprisedb.com> wrote: >> The utility would run in the old cluster before upgrading, so the the flag >> would have to be present in the old version. pg_upgrade would check that the >> flag is set, refusing to upgrade if it isn't, with an error like "please run >> pre-upgrade utility first".
> I find that a pretty unappealing design; it seems to me it'd be much > easier to make the new cluster cope with everything. Easier for who? I don't care for the idea of code that has to cope with two page formats, or before long N page formats, because if we don't have some mechanism like this then we will never be able to decide that an old data format is safely dead. regards, tom lane -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers