Dynamic error

Question

part1
CREATE OR REPLACE
TYPE ALL_DEV.OBJECT_ROW_TYPE AS OBJECT (
CNT NUMBER
CREATE OR REPLACE
TYPE ALL_DEV.REF_TYPE AS TABLE OF object_row_type
CREATE OR REPLACE FUNCTION ALL_DEV.ref_return
RETURN ref_type AS
v_tab ref_type := ref_type();
BEGIN
FOR cur IN (SELECT SERVED_MSISDN,COUNT(*) CNT
FROM FCT_CUSTOMER_TRANSACTION
GROUP BY SERVED_MSISDN
LOOP
v_tab.extend;
v_tab(v_tab.last) := object_row_type(cur.CNT);
END LOOP;
RETURN v_tab;
END;
SELECT *
FROM TABLE(get_all_objects) a;
part2
CREATE OR REPLACE
TYPE ALL_DEV.OBJECT_ROW_TYPE AS OBJECT (
CNT NUMBER
CREATE OR REPLACE
TYPE ALL_DEV.REF_TYPE AS TABLE OF object_row_type
CREATE OR REPLACE FUNCTION ALL_DEV.ref_return(reference_type in varchar2)
RETURN ref_type AS
str varchar2(4000);
v_tab ref_type := ref_type();
BEGIN
str:=' FOR cur IN (SELECT ' ||' ,COUNT(*) CNT
FROM FCT_CUSTOMER_TRANSACTION
GROUP BY SERVED_MSISDN
LOOP
v_tab.extend;
v_tab(v_tab.last) := object_row_type(cur.CNT);
END LOOP;';
execute immediate str ;
RETURN v_tab;
END;
SELECT * FROM TABLE(ref_return('SERVED_MSISDN')) a;
my question is
part 1 is working fine
but part 2 it return
invalid sql statement
please let me know what is the error;
both are same
in part 2 i am want to use dynamic thing.please help me

Answer 1

What are you trying to do with the sql given below:
SELECT ' ||' ,COUNT(*) CNT FROM FCT_CUSTOMER_TRANSACTION GROUP BY SERVED_MSISDN
Regards
RK