> The question is not how to replace some .EXE and .DLL files or modify
> something in the registry. The question is what to do with the existing
> databases in the case of a catalog version change. You have to dump and
> restore. 

pg_upgrade?

Otherwise: no upgrades persay, but you can intall the new version into a new 
directory and then have an automated pg_dump / restore between the old and 
the new.  This would require a lot of disk space, but I don't see any other 
clean way to automate it.



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