Re: [HACKERS] bigint vs txid user confusion

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
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