I don't see why you'd necessarily need to know where in the index the tuple
came from under my proposal. Besides, as I already pointed out, we already
hard code minus infinity handling within internal pages during tuple
comparisons.
Anastasia's patch could modify nbtree in exactly the same way as suffix
truncation would. I see no conflict there. Quite the opposite, in fact.
--
Peter Geoghegan
(Sent from my phone)