Set returning functions and Crystal Reports

Hello list,

Apologize first if this is off topic.

have this function in plpgsql

DECLARE
crow histmer%rowtype;
BEGIN
select * into crow from histmer
where fecha = date 'now';
if found then
return next crow;
end if;
select * into crow from histmer order by fecha desc limit 1 ;
insert into histmer values (date 'now', crow.mercado_ne, crow.factor_adu) ;
select * into crow from histmer
where fecha = date 'now';

return;
END

Any idea to make Crystal Reports (10) to accept it as a data set resulting?

Thanks in advace

--
Sinceramente,
Josué Maldonado.
"Para todo mal existen dos remedios: el tiempo y el silencio." Alejandro
Dumas. Escritor francés.