Bruce Momjian píše v st 28. 01. 2009 v 23:19 -0500:
> I am stumped as well. In the 12 years I have been involved, there are
> perhaps five issues that the original pg_upgrade written in 1998 didn't
> handle, and mostly handles now. Considering the number of catalog
> changes since 1998, the ratio is enormous.
You don't need convert all of catalogs and only few of them are usually
modified in each version (like pg_class, pg_type...).
Zdenek