On 12/20/16 10:20 PM, Craig Ringer wrote:
Tools look at pg_class.relfrozenxid and pg_databse.datfrozenxid more
than probably anything else, so making changes that ignores them is
pretty pointless.

Except the only useful way I know of to access *frozenxid is using age(), and even that is a royal PITA when the xid is a special xid. So I'd argue that we should effectively remove xid from user's view. Even if we don't want to bloat pg_class by 4 bytes, we should just make xid even more opaque than it is today and tell users to just cast it to bigxid.
Jim Nasby, Data Architect, Blue Treble Consulting, Austin TX
Experts in Analytics, Data Architecture and PostgreSQL
Data in Trouble? Get it in Treble! http://BlueTreble.com
855-TREBLE2 (855-873-2532)

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