How i will retrive rows from object type

Question

test is object type(varchar2,varchar2)
test1 is a object derived from test
test1(varchar2,varchar2,test);
how i will retrive rows from test1.
declare
type recf is ref cursor;
v_tab test1 := test1('a','b',test('c','d'));
rec recf;
begin
open rec for
select * from table(cast(v_tab as test1));
dbms_output.put_line('the rows are'||rec.test1.test11);
end;
when i compile this it return
ERROR at line 7:
ORA-06550: line 7, column 35:
PL/SQL: ORA-22907: invalid CAST to a type that is not a nested table or VARRAY
ORA-06550: line 7, column 1:
PL/SQL: SQL Statement ignored
ORA-06550: line 8, column 48:
PLS-00487: Invalid reference to variable 'REC'
ORA-06550: line 8, column 1:
PL/SQL: Statement ignored
error.

Answer 1

hi ur previous example really helping me but please help me in this current senario,
PROCEDURE reserveNumbers (
     TheNumberRange IN NumberRange,
     UserID IN userid,
     ReturnStatus OUT CallStatus ); which is in P_Numbermgr_Api package.
here NumberRange is a object
TYPE NumberRange IS OBJECT (
     StartNumber               VARCHAR2(40),
     EndNumber               VARCHAR2(40),
     NumberAttributes          NumberAttr)
NumberAttributes field based on NumberAttr object
TYPE NumberAttr IS OBJECT (
     NumberType          VARCHAR2(15),
     CountryCode          VARCHAR2(10),
     CityCode      VARCHAR2(3))
i write a package within package i am calling P_Numbermgr_Api.reserveNumbers:
CREATE or replace TYPE My_numberrange IS TABLE OF numberrange;
CREATE OR REPLACE PACKAGE numberrange_wrapper AS
TYPE cursor_type IS REF CURSOR;
TYPE cursor_type1 IS REF CURSOR;
TYPE cursor_type2 IS REF CURSOR;
v_userid number;
PROCEDURE Getnumberrange (userid IN number,
p_recordset OUT numberrange_wrapper.cursor_type);
END numberrange_wrapper;
within package body i write
CREATE OR REPLACE PACKAGE body numberrange_wrapper AS
PROCEDURE Getnumberrange (userid IN number,p_recordset IN OUT numberrange_wrapper.cursor_type)
is
v_tab My_numberrange := My_numberrange();
refc numberrange_wrapper.cursor_type2;
BEGIN
numberrange_wrapper.v_userid:= userid;
OPEN p_recordset FOR
SELECT
     * FROM
     Table(Cast(v_tab As My_numberrange));
P_Numbermgr_Api.reserveNumbers (My_numberrange,v_userid,p_recordset);
END Getnumberrange;
end numberrange_wrapper;
it return
PLS-00330: invalid use of type name or subtype name
please help me how i will solve this problem