Oracle PL/SQL - Are NO_DATA_FOUND Exceptions bad for stored procedure performance?

Question

I\'m writing a stored procedure that needs to have a lot of conditioning in it. With the general knowledge from C#.NET coding that exceptions can hurt performance, I\'ve always

Answer 1

Rather than having nested cursor loops a more efficient approach would be to use one cursor loop with an outer join between the tables.

BEGIN
    FOR rec IN (SELECT a.needed_field,b.other_field
                  FROM table1 a
                  LEFT OUTER JOIN table2 b
                    ON a.needed_field = b.condition_field
                 WHERE a.column = ???)
    LOOP
       IF rec.other_field IS NOT NULL THEN
         -- whatever processing needs to be done to other_field
       END IF;
    END LOOP;
END;