| From: | Piotr Stefaniak <postgres(at)piotr-stefaniak(dot)me> |
|---|---|
| To: | Michael Paquier <michael(dot)paquier(at)gmail(dot)com> |
| Cc: | Noah Misch <noah(at)leadboat(dot)com>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Dean Rasheed <dean(dot)a(dot)rasheed(at)gmail(dot)com>, Peter Eisentraut <peter_e(at)gmx(dot)net>, PostgreSQL Hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Proposal: Trigonometric functions in degrees |
| Date: | 2016-01-31 13:03:27 |
| Message-ID: | BLU436-SMTP128AB208D4F1E5D4984682CF2DD0@phx.gbl |
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| Lists: | pgsql-hackers |
On 01/31/2016 01:23 PM, Michael Paquier wrote:
> Per IEEE 754, division by 0 for a double results in Nan or +/-Inf, so
> that's actually correct.
I didn't know that. I guess that in practice that is OK and the case is
closed.
Interestingly to me, that assumption appears to rely on the C
implementation complying to IEC 60559, in which case C99 lets the
implementation signal that by defining the __STDC_IEC_559__ macro. C89
doesn't seem to mention any of this.
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