você precisará de um REF CURSOR e abri-lo condicionalmente, por exemplo:
SQL> CREATE OR REPLACE PROCEDURE GET_RECORDS(v_action IN VARCHAR2) IS
2 v_thing VARCHAR2(10);
3 get_records SYS_REFCURSOR;
4 BEGIN
5 IF (v_action = 'DO THIS') THEN
6 OPEN get_records FOR
7 SELECT 1 FROM dual;
8 ELSE
9 OPEN get_records FOR
10 SELECT 2 FROM dual;
11 END IF;
12
13 LOOP
14 FETCH get_records INTO v_thing;
15 EXIT WHEN get_records%NOTFOUND;
16 /* do things */
17 dbms_output.put_line(v_thing);
18 END LOOP;
19 CLOSE get_records;
20 END;
21 /
Procedure created
SQL> exec get_records ('DO THIS');
1
PL/SQL procedure successfully completed
SQL> exec get_records ('DO THAT');
2
PL/SQL procedure successfully completed
