Doesn't NVL work with Assosiative array elements

Question

Doesn't NVL work with Assosiative arrays? When i tried to UPDATE empdtls table with the values stored
in v_ename array, i got no_data_found error because
the query, select ename bulk collect into v_ename.....returns only 5 rows and v_ename(6) was null. So i tried NVL and COALESCE for v_ename(6). I couldn't succeed.
Any workarounds?
create table empdtls
(ename1 varchar2(30),
ename2 varchar2(30),
ename3 varchar2(30),
ename4 varchar2(30),
ename5 varchar2(30),
ename6 varchar2(30),
location varchar2(30));
SQL> insert into empdtls(location) values ('NY');
1 row created.
SQL> commit;
declare
type ename_arraytyp is table of varchar2(100) index by binary_integer;
v_ename ename_arraytyp;
begin
select ename bulk collect into v_ename from emp where sal>2900;
dbms_output.put_line(v_ename(1));
dbms_output.put_line(v_ename(2));
dbms_output.put_line(v_ename(3));
update empdtls
           set ename1=v_ename(1),
               ename2=v_ename(2),
               ename3=v_ename(3),
               ename4=v_ename(4),
               ename5=v_ename(5),
               ename6=NVL(v_ename(6),'No Name')
           where location='NY';
commit;
end;
declare
ERROR at line 1:
ORA-01403: no data found
ORA-06512: at line 9Message was edited by:
J.Kiechle

Answer 1

If you used a schema level collection type (i.e. created with CREATE TYPE) you could also use the unsupported SYS_OP_CEG function which appears to return collection elements for given index values without error if the element does not exist.
Oracle Database 10g Express Edition Release 10.2.0.1.0 - Production
SQL> CREATE OR REPLACE TYPE varchar2_table
  2  AS
  3     TABLE OF VARCHAR2 (4000);
  4  /
Type created.
SQL> DECLARE
  2     v_ename varchar2_table;
  3  BEGIN
  4     SELECT ename
  5     BULK COLLECT INTO v_ename
  6     FROM   emp
  7     WHERE  sal > 2900;
  8
  9     UPDATE empdtls
10        SET ename1 = sys_op_ceg (v_ename, 1),
11            ename2 = sys_op_ceg (v_ename, 2),
12            ename3 = sys_op_ceg (v_ename, 3),
13            ename4 = sys_op_ceg (v_ename, 4),
14            ename5 = sys_op_ceg (v_ename, 5),
15            ename6 = sys_op_ceg (v_ename, 6)
16      WHERE location = 'NY';
17  END;
18  /
PL/SQL procedure successfully completed.
SQL>