This is not a large object. We are seeing rows with duplicate oids
because the OID counter is not changed after the dump (exported with
--oids) is being loaded.
How does 8.1 prevent to allocate duplicate OIDs?
If there's a unique index on the OID column then 8.1 will not allocate
duplicate OIDs. If there's not such a unique index, you had no
guarantee of no-duplicates before 8.1 either.
regards, tom lane
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