"Florian G. Pflug" <fgp@phlo.org> writes:
> What is the argument against making relfilenodes globally unique by adding the
> xid and epoch of the creating transaction to the filename?
1. Zero chance of ever backpatching. (I know I said I wasn't excited about that, but it's still a strike against a
proposedfix.)
2. Adds new fields to RelFileNode, which will be a major code change, and possibly a noticeable performance hit
(biggerhashtable keys).
3. Adds new columns to pg_class, which is a real PITA ...
4. Breaks oid2name and all similar code that knows about relfilenode.
regards, tom lane
