Re: power() function in Windows: "value out of range: underflow"

On Sun, Apr 29, 2018 at 7:24 PM, David Rowley
<david(dot)rowley(at)2ndquadrant(dot)com> wrote:
> I think we should back patch and try to be consistent about the
> power(float8 1.0, 'NaN') and power('NaN', float8 0.0) cases. The
> archives don't show any complaints about power() with NaN until this
> one, so I imagine the number of people affected by this is small.

I agree that this is not likely to affect a lot of people -- but the
question isn't how many people will be affected but rather, of those
that are, how many of them will be pleased rather than displeased by a
change. I would argue that the results have to be unambiguously wrong
in the back-branches to justify a change there, and this doesn't
appear to meet that standard. I would guess that the number of people
who use NaN is very small, but those people have probably adapted
their application to the behavior they are getting currently.

--
Robert Haas
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