| From: | "Heikki Linnakangas" <heikki(at)enterprisedb(dot)com> |
|---|---|
| To: | "Renaud Diez" <rdiez(at)salesprize(dot)com> |
| Cc: | <pgsql-bugs(at)postgresql(dot)org> |
| Subject: | Re: BUG #3959: Huge calculation error |
| Date: | 2008-02-13 11:24:49 |
| Message-ID: | 47B2D381.1010304@enterprisedb.com |
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| Thread: | |
| Lists: | pgsql-bugs |
Renaud Diez wrote:
> The following bug has been logged online:
>
> Bug reference: 3959
> Logged by: Renaud Diez
> Email address: rdiez(at)salesprize(dot)com
> PostgreSQL version: 8.2
> Operating system: Debian
> Description: Huge calculation error
> Details:
>
> the basic mathematical expression like the following one doesn't compute the
> correct result:
>
>> select 100*(1+(21/100));
>
> return a result of 100 instead of 121.
That's because 21/100 = 0, in integer math. Try "SELECT
100*(1+(21/100.0))" to use floating points.
--
Heikki Linnakangas
EnterpriseDB http://www.enterprisedb.com
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