On Apr 1, 2011, at 4:48 PM, Bruce Momjian wrote: > I am not so concerned about this case but about other cases where we are > computing xid distances across the invalid range.
Bruce, I think you hit the nail on the head earlier: > To do the right thing every computation that passes over the xid > wraparound bounary should subtract FirstNormalTransactionId, not just > those that fall in the boundry. Put another way: XID calculations should not use just +/-, but an operator (presumably a macro) that understands wraparound and the special values. Surely we have a similar problem in the code that increments XIDs, and possibly other places as well. -- Jim C. Nasby, Database Architect j...@nasby.net 512.569.9461 (cell) http://jim.nasby.net -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
