Re: BUG #3991: pgsql function sum()

mirek napsal(a):
> The following bug has been logged online:
>
> Bug reference: 3991
> Logged by: mirek
> Email address: mirek(at)mascort(dot)com(dot)pl
> PostgreSQL version: 8.2.4
> Operating system: Linux fedora(for work) and windows(for development)
> Description: pgsql function sum()
> Details:
>
> I saw a very strange behavior when i used function SUM() in query (used
> inside pg function), query:
>
> select magazyn, ciag, numer, datawp, vat, sum(wnetto-wnettop) as wn,
> sum(wvat-wvatp) as wv, sum(wbrutto-wbruttop) as wb from vzk_pozycjezinfo
> where magazyn = $1 and ciag = $2 and numer = $3 and datawp = $4
> group by magazyn, ciag, numer, datawp, vat
> order by magazyn, ciag, numer, datawp, vat
>
> vzk_pozycjezinfo is view
>
> problem is in: sum(wvat-wvatp) where field in view wvat = 33.08 and wvatp =
> 36.09
> Result is -3.01000000000001
>
> If I ask postgres manualy: select sum(33.08 - 36.09)
> result is ok -3.01
>
> Now I fix it with round function but i think that is a bug.

How are wv and wb attribute defined? Are they number or flout/double?

Zdenek