> About oids not being unique, oids can assume 4 billion different values. If you
> have more than those many rows in a table, oids will wrap around and will no
> longer be unique in that object.
Not quite. After 4 billion inserts (even spread across millions of
tables), you run out of OIDs and they will no longer be unique. OIDs I
think were originally meant to be globally unique identifiers, but they
are no longer so, and are really no longer useful. When I want globally
unique identifiers, I use an int8 column + sequence.
Jon