Tom Lane wrote:
> Peter Eisentraut <> writes:
> > +# contrib/pg_upgrade/
> > +#
> > +# Test driver for pg_upgrade.  Initializes a new database cluster,
> > +# runs the regression tests (to put in some data), runs pg_dumpall,
> > +# runs pg_upgrade, runs pg_dumpall again, compares the dumps.
> Hm .. my experience is that that doesn't work at all, because the
> regression tests set up assorted C functions whose implementations are
> in, and it creates them with absolute path references
> to  When you try to load that into another installation
> that's a different version of PG, it quite properly fails.  So I think
> that as given, this script is only useful for testing pg_upgrade of
> $currentversion to $currentversion.  Which is surely better than no test

Reminder --- you can't use pg_upgrade to go from the same catalog
version to the same catalog version because the catalog version is
embedded in the tablespace directory name.

  Bruce Momjian  <>

  + It's impossible for everything to be true. +

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