Search Postgresql Archives

Re: numeric precision when raising one numeric to another.

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Thu, May 19, 2005 at 02:25:58PM -0700, Dann Corbit wrote:
> Hmmm....
> I underestimated.
> 
> pow(99999.99999,99999.99999) =

Yeah, a number with x digits raised to the power with something y digits
long could have a length approximating:

x * (10^y) digits

So two numbers both 4 digits long can have a result of upto 40,000
digits. You're only going to be able to them represent exactly for
cases where y is small and integer.

What's a meaningful limit? Do we simply say, you get upto 100 digits
and that's it? Or an extra parameter so you can specify directly?
-- 
Martijn van Oosterhout   <kleptog@xxxxxxxxx>   http://svana.org/kleptog/
> Patent. n. Genius is 5% inspiration and 95% perspiration. A patent is a
> tool for doing 5% of the work and then sitting around waiting for someone
> else to do the other 95% so you can sue them.

Attachment: pgpZKW1Km0rqW.pgp
Description: PGP signature


[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Index of Archives]     [Postgresql Jobs]     [Postgresql Admin]     [Postgresql Performance]     [Linux Clusters]     [PHP Home]     [PHP on Windows]     [Kernel Newbies]     [PHP Classes]     [PHP Books]     [PHP Databases]     [Postgresql & PHP]     [Yosemite]
  Powered by Linux