From: | Mathieu Dubois <mathieu(dot)dubois(at)limsi(dot)fr> |
---|---|
To: | pgsql-novice(at)postgresql(dot)org |
Subject: | Re: How many digits are printed with double precision? |
Date: | 2011-03-23 21:24:22 |
Message-ID: | 4D8A6506.70203@limsi.fr |
Views: | Raw Message | Whole Thread | Download mbox | Resend email |
Thread: | |
Lists: | pgsql-novice |
Hi Tom,
Thanks for the very fast answer but what do you mean exactly by :
"See extra_float_digits."
I have found messages on the mailing list but it doesn't help (I don't
want to recompile everything). Is there an option in some configuration
file to set?
Mathieu
On 03/23/2011 10:02 PM, Tom Lane wrote:
> Mathieu Dubois<mathieu(dot)dubois(at)limsi(dot)fr> writes:
>> I have a double precision column in my DB (it's the time at which an
>> image was taken expressed in second from UNIX epoch). When I query the
>> value (SELECT time...) I get only 5 digits after the dot (while I
>> /suppose/ there are 6 digits). I have the same result when using
>> pgadmin. The results looks like the rounding of the desired time (which
>> I know by the filename).
> See extra_float_digits. Be aware that cranking that up produces digits
> that are not 100% trustworthy. If you are expecting exact results of
> more than 15 places, you likely shouldn't be using float arithmetic.
>
> regards, tom lane
>
From | Date | Subject | |
---|---|---|---|
Next Message | Frank Bax | 2011-03-23 21:35:46 | Re: How many digits are printed with double precision? |
Previous Message | Vibhor Kumar | 2011-03-23 21:05:55 | Re: EnterpriseDB OSX 9.0.2 PostgresPlus Installer |