Re: 8.3: timestamp subtraction

Scott Marlowe schrieb:
> On Sat, May 23, 2009 at 7:18 AM, Christophe <xof(at)thebuild(dot)com> wrote:
>
>> On May 23, 2009, at 9:13 AM, Daniel Verite wrote:
>>
>>>> I don't know why this query returns false:
>>>> SELECT '20040506 070809.010000'::timestamp(6) - '20010203
>>>> 040506.007000'::timestamp(6) = '1188 day 3 hour 3 minute 3 second 3
>>>> millisecond'::interval;
>>>> If I just subtract the two timestamps, its result is the interval I
>>>> specified.
>>>> What may cause this?
>>>>
>>> It works for me:
>>>
>>> test=> SELECT '20040506 070809.010000'::timestamp(6) -
>>> '20010203 040506.007000'::timestamp(6)=
>>> '1188 day 3 hour 3 minute 3 second 3 millisecond'::interval;
>>> ?column? ----------
>>> t
>>> (1 row)
>>>
>> Could this be due to the OP's build of PG using floating point timestamps?
>>
>
> That's what I'm thinking
Me too, a testquery-result on a Windows-System with version "PostgreSQL
8.3.0, compiled by Visual C++ build 1400":

SELECT ('20040506 070809.010000'::timestamp(6) - '20010203
040506.007000'::timestamp(6) - '1188 day 3 hour 3 minute 3 second 3
millisecond'::interval) * 1e10;

=> -00:01:28.220986