Re: Catalog vs. user table format (was Re: State of Beta

On Sat, 20 Sep 2003, Ron Johnson wrote:

> On Sat, 2003-09-20 at 11:17, Tom Lane wrote:
> > "Marc G. Fournier" <scrappy@postgresql.org> writes:
> > > No, I'm not suggesting no catalog changes ... wait, I might be wording
> > > this wrong ... there are two changes that right now requires a
> > > dump/reload, changes to the catalogs and changes to the data structures,
> > > no?  Or are these effectively inter-related?
> >
> > Oh, what you're saying is no changes in user table format.  Yeah, we
>
> Whew, we're finally on the same page!
>
> So, some definitions we can agree on?
> "catalog change": CREATE or ALTER a pg_* table.
> "on-disk structure", a.k.a. "user table format": the way that the
> tables/fields are actually stored on disk.
>
> So, a catalog change should *not* require a dump/restore, but an
> ODS/UTF change should.

As long as pg_update is updated/tested for this, yes, that is what the
thought is ... but, that still requires someone(s) to step up and work
on/maintain pg_upgrade for this to happen ... all we are agreeing to right
now is implement a policy whereby maintaining pg_upgrade is *possible*,
not one where maintaining pg_upgrade is *done* ...