Re: OID wraparound (was Re: [HACKERS] pg_depend)

[Tom Lane]

>> What's wrong with 64-bit oids (except extra 4bytes)?

> Portability, mostly.

Oh, there's one other small problem: breaking the on-the-wire protocol.
We send OIDs as column datatype identifiers, so an 8-byte-OID backend
would not interoperate with clients that didn't also think OID is 8
bytes.  Aside from client/server compatibility issues, that raises the
portability ante a good deal --- not only your server machine has to
have 'long long' support, but so do all your application environments.

                        regards, tom lane

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