BUG #4603: float4 error
The following bug has been logged online:
Bug reference: 4603
Logged by: Stefan Hoffmann
Email address: hoffst@maxinf.de
PostgreSQL version: 7.4
Operating system: ubuntu linux server
Description: float4 error
Details:
some specific values such as 20048223 or -25771373 can't be stored in float4
. they are replaced by 20048224 and
-25771372 when inserted or updated in float4 .
is this a problem of 7.4 or caused by "inexact" float4 ?
"Stefan Hoffmann" <hoffst@maxinf.de> writes:
some specific values such as 20048223 or -25771373 can't be stored in float4
. they are replaced by 20048224 and
-25771372 when inserted or updated in float4 .
is this a problem of 7.4 or caused by "inexact" float4 ?
The latter. On most machines float4 is only good for about six
significant digits, and you're expecting eight ...
regards, tom lane