On Tue, May 29, 2018 at 02:00:20PM -0400, Tom Lane wrote:
> Justin Pryzby <pryzby@telsasoft.com> writes:
> > I've used pg_upgrade like this before, but maybe from a different (recent)
> > 11dev HEAD; I found: "pg_upgrade supports upgrades from 8.4.X and later to the
> > current major release of PostgreSQL, including snapshot and beta releases."
> > (But maybe upgrades FROM beta releases aren't supported in the general case?)
>
> Yeah, that :-(. pg_dump's approach to cross-version catalog differences
> can only cope with differences between major versions. So if it sees
> a server that calls itself 11-something it's going to think that means
> the current catalog layout. There's no good way to deal with pre-beta
> snapshot versions, other than to dump with a pg_dump of the same vintage.
Thanks for confirming.
In this case I worked around it by doing:
sudo ln -sfv /usr/pgsql-11{dev0,b1}/bin/pg_dump
sudo ln -sfv /usr/pgsql-11{dev0,b1}/bin/pg_dumpall
I guess, if need be, pg_dump could look at CATALOG_VERSION..
Justin