Cannot perform a dml statement within a query: ora-14551

Question

I'm trying to call my function from a SELECT statement, and I keep getting the error mentioned in the title of the thread.
Could anybody help me out with this?
HEre's my code:
BEGIN
DECLARE CURSOR cur_order IS
  SELECT idshopper, orderplaced
  FROM bb_basket
  WHERE idshopper=p_shopperid
  FOR UPDATE NOWAIT;
BEGIN
FOR rec_order IN cur_order LOOP
  IF rec_order.orderplaced=1 THEN lv_count_num:=lv_count_num+1;
  END IF;
  IF rec_order.orderplaced=0 THEN lv_count_num:=0;
  END IF;
END LOOP;
RETURN lv_count_num;
END;
END;
SELECT idshopper, num_purch_sf(idshopper)
FROM bb_shopper
WHERE idshopper=23;

Answer 1

And you probably want to rewrite this to a single query like this:
select s.idshopper
     , nvl(sum(b.orderplaced),0)
  from bb_shopper s
     , bb_basket b
where s.idshopper = b.idshopper (+)
   and s.idshopper = 23
group by s.idshopperThis way you won't have extra code to maintain and you prevent the contextswitches from SQL to PL/SQL.
Note: query untested
Regards,
Rob.
Message was edited by:
Rob van Wijk
Looking closer at the original code, I see that your query doesn't have an order by and so the outcome of your function is undeterministic. Maybe my query is what you intended, but beware: my query won't necessarily yield the same result