Обсуждение: Length of OID

I saw that it is a 4 byte integer on my site, but is that guaranteed? Or how
do I check for its length? That is I have to know how long a string has to
be so the oid fits in ascii.

Michael
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Michael Meskes <meskes@postgreSQL.org> writes:
> I saw that it is a 4 byte integer on my site, but is that guaranteed?

Yes, for now anyway.

Eventually I'd like to see us offering 8-byte OIDs, because a DB that's
been running for a while could wrap around the OID counter and produce
duplicate OIDs :-(.  But until support for 8-byte "long long int" is
pretty standard, I don't think we can do it without creating tremendous
portability problems.
        regards, tom lane