Validation currency field

Question

I want to create a validation. The field should be checked in max. two decimal places,not null, > 0 and in numeric.
I tried this:
if v('P42_BESTAND') is not null
and v('P42_BESTAND') > 0 then
return true;
else
return false;
end if;
exception --'when others then return false;'doesn't work?
when others then
if sqlcode = -1722 --invalid_number
then return false;
end if;
It works, but I think that it is not the best way, and the problem of the decimal places is not solved.
Who can help? Thanks in advance.

Answer 1

Jorg,
I'd do it this way:
begin
if nvl(to_number(:P42_BESTAND),0) > 0 then
return TRUE;
else
return FALSE;
end if;
exception
when others then
return FALSE;
end;
Joel