Re: 8.3: timestamp subtraction

Scott Marlowe schrieb:

On Sat, May 23, 2009 at 7:18 AM, Christophe <xof@thebuild.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

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