David Santinoli <u235@libero.it> writes:
> going to dump/reload the databases WITH OIDS, and there's a high risk
> that some rows in the first database will have same OIDs as some rows
> from the second one. As long as the clashing rows belong to different
> databases, however, it seems there's no trouble with them. To which
> extent is this correct?
The system won't mind. There are duplicate OIDs in every database
already --- consider system tables like pg_class, which have the
same OID in every DB, even though they're different tables.
regards, tom lane