Re: [BUGS] BUG #2846: inconsistent and confusing - Mailing list pgsql-patches

From Joshua D. Drake
Subject Re: [BUGS] BUG #2846: inconsistent and confusing
Date
Msg-id 1167255834.12075.50.camel@localhost.localdomain
Whole thread Raw
In response to Re: [BUGS] BUG #2846: inconsistent and confusing  (Bruce Momjian <bruce@momjian.us>)
List pgsql-patches
> I get 'inf'.  I am on BSD and just tested it on Fedora Core 2 and got
> 'inf' too.

Ubuntu Edgy 64bit on Athlon 64X2 returns inf.

Joshua D. Drake


>
> > A slightly less radical proposal is to reject only the case where
> > isinf(result) and neither input isinf(); and perhaps likewise with
> > respect to NaNs.
>
> Uh, that's what the patch does for 'Inf':
>
>     result = arg1 + arg2;
>     CheckFloat4Val(result, isinf(arg1) || isinf(arg2));
>
> I didn't touch 'Nan' because that is passed around as a value just fine
> --- it isn't created or tested as part of an overflow.
>
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