Stephan Szabo wrote:
> On Fri, 27 Jul 2001, John Oakes wrote:
>
> > Can anyone tell me why this always return 1? Thanks!
> >
> > CREATE FUNCTION passrate(date, date, text) RETURNS float AS '
> >
> > DECLARE
> > begindate ALIAS FOR $1;
> > enddate ALIAS FOR $2;
> > passfail ALIAS FOR $3;
> > ret float;
> > countp float;
> > counttotal float;
> >
> >
> > BEGIN
> >
> > SELECT INTO countp COUNT(*)
> > FROM benchmark
> > WHERE passfail = passfail;
>
> Ehhh? Were you expecting that to substitue
> for *one* of those passfails and not the
> other? ;)
>
> Rename the alias variable to something else.
>
> >
> > SELECT INTO counttotal COUNT(*)
> > FROM benchmark;
> >
> > ret := countp / counttotal;
And check for zero before doing a division, as a transaction
abort is usually not exactly what you want.
Jan
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