From: | Peter Eisentraut <peter_e(at)gmx(dot)net> |
---|---|
To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Dean Rasheed <dean(dot)a(dot)rasheed(at)gmail(dot)com> |
Cc: | Noah Misch <noah(at)leadboat(dot)com>, Michael Paquier <michael(dot)paquier(at)gmail(dot)com>, Robert Haas <robertmhaas(at)gmail(dot)com>, "pgsql-hackers(at)postgresql(dot)org" <pgsql-hackers(at)postgresql(dot)org> |
Subject: | Re: [COMMITTERS] pgsql: Add trigonometric functions that work in degrees. |
Date: | 2016-04-21 19:47:08 |
Message-ID: | 57192E3C.9040109@gmx.net |
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Lists: | pgsql-committers pgsql-hackers |
On 04/19/2016 04:48 PM, Tom Lane wrote:
> Pushed. Peter, what results do you get from these tests on your
> problematic machine?
acosd(x),
acosd(x) IN (0,60,90,120,180) AS acosd_exact
FROM (VALUES (-1), (-0.5), (0), (0.5), (1)) AS t(x);
- x | asind | asind_exact | acosd | acosd_exact
-------+-------+-------------+-------+-------------
- -1 | -90 | t | 180 | t
- -0.5 | -30 | t | 120 | t
- 0 | 0 | t | 90 | t
- 0.5 | 30 | t | 60 | t
- 1 | 90 | t | 0 | t
+ x | asind | asind_exact | acosd | acosd_exact
+------+----------------------+-------------+-------+-------------
+ -1 | -90 | t | 180 | t
+ -0.5 | -29.9999999999999964 | f | 120 | t
+ 0 | 0 | t | 90 | t
+ 0.5 | 29.9999999999999964 | f | 60 | t
+ 1 | 90 | t | 0 | t
(5 rows)
This is the same under the default -O2 and under -O0.
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