On Tue, Oct 3, 2017 at 6:09 PM, Wood, Dan <hexp...@amazon.com> wrote: > I’ve just started looking at this again after a few weeks break.
> if (TransactionIdIsValid(priorXmax) && > !TransactionIdEquals(priorXmax, > HeapTupleHeaderGetXmin(htup))) > break; > We need to understand why these TXID equal checks exist. Can we > differentiate the cases they are protecting against with the two exceptions > I’ve found? I haven't read your remarks here in full, since I'm about to stop working for the day, but I will point out that src/backend/access/heap/README.HOT says a fair amount about this, under "Abort Cases". -- Peter Geoghegan -- Sent via pgsql-hackers mailing list (email@example.com) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers