Re: preserving db/ts/relfilenode OIDs across pg_upgrade (was Re: storing an explicit nonce)

I wrote:
> Robert Haas <robertmhaas@gmail.com> writes:
>> The only hard requirement for this feature is if we
>> use the database OID for some kind of encryption or integrity checking
>> or checksum type feature.

> It's fairly unclear to me why that is so important as to justify the
> amount of klugery that this line of thought seems to be bringing.

And, not to put too fine a point on it, how will you possibly do
that without entirely breaking CREATE DATABASE?

            regards, tom lane