Stephan Szabo wrote:
On Thu, 3 Jun 2004, Jeff Boes wrote:
(asked last week on .questions, no response)
Can anyone explain why this happens? (under 7.4.1)
select '2004-05-27 09:00:00.500001-04' :: timestamp(0) ;
timestamp --------------------- 2004-05-27 09:00:01
select '2004-05-27 09:00:00.500000-04' :: timestamp(0) ;
timestamp --------------------- 2004-05-27 09:00:00
That is, why doesn't the second operation result in the same timestamp
as the first? Is it a floating-point representation issue, or are the
mathematical rules of rounding not being followed correctly (as I
understand them, anyway)?
My first guess would be that your system probably implements its default
rounding as nearest even for .5 results, what does 9:00:01.5 give you?
2004-05-27 09:00:02, so I guess that would confirm it.
-- Jeff Boes vox 269.226.9550 ext 24 Database Engineer fax 269.349.9076 Nexcerpt, Inc. http://www.nexcerpt.com ...Nexcerpt... Extend your Expertise
---------------------------(end of broadcast)--------------------------- TIP 6: Have you searched our list archives?
http://archives.postgresql.org
