PL/SQL:- Invalid Parameter binding

Question

While calling a pl/sql function returning table type is shows error:
Invalid parameter binding
Parameter name: ""

Answer 1

The problem is coming from .NET and most probably for NULL values.
SQL> set serverout on
SQL> create TYPE TEMP_TABLE AS OBJECT (
  2  COLUMN1 VARCHAR2(128),
  3  COLUMN2 VARCHAR2(32),
  4  COLUMN3 VARCHAR2(128));
  5  /
Type created.
SQL> create TYPE TEMP_TABLE_REC AS TABLE OF TEMP_TABLE;
  2  /
Type created.
SQL> create function SP_TEMP RETURN TEMP_TABLE_REC AS
  2 
  3  v_process_inputs TEMP_TABLE_REC :=TEMP_TABLE_REC();
  4 
  5  CURSOR CUR_EQUIP IS
  6  SELECT 'b' FROM dual
  7  UNION
  8  SELECT 'f' FROM dual;
  9 
10  REC_EQUIP CUR_EQUIP%ROWTYPE;
11 
12  BEGIN
13 
14  OPEN CUR_EQUIP;
15  LOOP
16  FETCH CUR_EQUIP INTO REC_EQUIP;
17  EXIT WHEN CUR_EQUIP%NOTFOUND;
18  v_process_inputs.EXTEND;
19 
20  v_process_inputs(1):=TEMP_TABLE('a','b','c');
21 
22  END LOOP;
23  CLOSE CUR_EQUIP;
24 
25  RETURN v_process_inputs;
26  END SP_TEMP;
27  /
Function created.
SQL> declare
  2     result temp_table_rec;
  3  begin
  4    -- Call the function
  5    result := sp_temp;
  6    FOR i in 1..RESULT.COUNT LOOP
  7     dbms_output.put_line(RESULT(i).COLUMN1||'--'||RESULT(i).COLUMN2||'--'||RESULT(i).COLUMN3);
  8    END LOOP;
  9  end;
10  /
a--b--c
PL/SQL procedure successfully completed.Note the last null values ----.