CREATE OR REPLACE PACKAGE kscope_ptf AS 
  FUNCTION describe (p_tbl IN OUT DBMS_TF.TABLE_T ) 
    RETURN DBMS_TF.DESCRIBE_T; 
END; 

CREATE OR REPLACE PACKAGE BODY kscope_ptf AS 
  FUNCTION describe (p_tbl IN OUT DBMS_TF.TABLE_T ) 
    RETURN DBMS_TF.DESCRIBE_T IS 
  BEGIN 
    RETURN NULL; 
  END; 
END; 

CREATE OR REPLACE FUNCTION kscope_func(p_tbl IN TABLE ) 
  RETURN TABLE PIPELINED 
  TABLE POLYMORPHIC USING kscope_ptf; 

SELECT * 
  FROM kscope_func(kscope)

SELECT * 
  FROM kscope_func(kscope PARTITION BY year 
                          ORDER BY year)