Usingoforaclerefcursor

CREATE OR REPLACE PACKAGE strongly_typed IS

TYPE return_cur IS REF CURSOR RETURN all_tables%ROWTYPE;
PROCEDURE child(p_return_rec OUT return_cur);
PROCEDURE parent(p_NumRecs PLS_INTEGER);

END strongly_typed;
/

CREATE OR REPLACE PACKAGE BODY strongly_typed IS
PROCEDURE child(p_return_rec OUT return_cur) IS

BEGIN
 OPEN p_return_rec FOR 
 SELECT * FROM all_tables; 
END child;
--==================================================
PROCEDURE parent (p_NumRecs PLS_INTEGER) IS 
 p_retcur return_cur;
 at_rec all_tables%ROWTYPE;
BEGIN
 child(p_retcur);

 FOR i IN 1 .. p_NumRecs
 LOOP
 FETCH p_retcur
 INTO at_rec;

 dbms_output.put_line(at_rec.table_name || 
 ' - ' || at_rec.tablespace_name || 
 ' - ' || TO_CHAR(at_rec.initial_extent) || 
 ' - ' || TO_CHAR(at_rec.next_extent));
 END LOOP;
END parent;
END strongly_typed;
/

set serveroutput on

exec strongly_typed.parent(1);
exec strongly_typed.parent(8);

CREATE OR REPLACE PROCEDURE child (
 p_NumRecs IN PLS_INTEGER,
 p_return_cur OUT SYS_REFCURSOR)
IS

BEGIN
 OPEN p_return_cur FOR
 'SELECT * FROM all_tables WHERE rownum <= ' || p_NumRecs ;
END child;
/

CREATE OR REPLACE PROCEDURE parent (pNumRecs VARCHAR2) IS
 p_retcur SYS_REFCURSOR;
 at_rec all_tables%ROWTYPE;
BEGIN
 child(pNumRecs, p_retcur);

 FOR i IN 1 .. pNumRecs
 LOOP
 FETCH p_retcur
 INTO at_rec;

 dbms_output.put_line(at_rec.table_name ||
 ' - ' || at_rec.tablespace_name ||
 ' - ' || TO_CHAR(at_rec.initial_extent) ||
 ' - ' || TO_CHAR(at_rec.next_extent));
 END LOOP;
END parent;
/

set serveroutput on

exec parent(1);
exec parent(17);

CREATE TABLE employees (
empid NUMBER(5),
empname VARCHAR2(30));

INSERT INTO employees (empid, empname) VALUES (1, 'Dan Morgan');
INSERT INTO employees (empid, empname) VALUES (2, 'Hans Forbrich');
INSERT INTO employees (empid, empname) VALUES (3, 'Caleb Small');
COMMIT;
CREATE OR REPLACE PROCEDURE pass_ref_cur(p_cursor SYS_REFCURSOR) IS

TYPE array_t IS TABLE OF VARCHAR2(4000)
INDEX BY BINARY_INTEGER;

rec_array array_t;

BEGIN
 FETCH p_cursor BULK COLLECT INTO rec_array;

 FOR i IN rec_array.FIRST .. rec_array.LAST
 LOOP
 dbms_output.put_line(rec_array(i));
 END LOOP;
END pass_ref_cur;
/
set serveroutput on

DECLARE
 rec_array SYS_REFCURSOR;
BEGIN
 OPEN rec_array FOR
 'SELECT empname FROM employees';

 pass_ref_cur(rec_array);
 CLOSE rec_array;
END;
/