Florian Pflug <fgp@phlo.org> writes:
> For float 4 and float8, wasn't the consensus that the potential
> lossy-ness of addition makes this impossible anyway, even without the
> NaN issue? But...
Well, that was my opinion, I'm not sure if it was consensus ;-).
But NaN is an orthogonal problem I think. I'm not sure whether it
has analogues in other data types.
regards, tom lane