VARRAY padding in procedure

Question

Hi all,
Im a little new to this so please bear with me..
I have created a type of VARRAY:
CREATE OR REPLACE TYPE rows_of as VARRAY(10) OF CHAR;
And a procedure that takes two of the types. What I want the procedure to do is pad out the lenth of sencond type being passed in with '-' charctor. Below is the procedure I have written but for some reason it keeps throwing me the error:
ERROR at line 1:
ORA-06533: Subscript beyond count
ORA-06512: at "PADD", line 14
ORA-06512: at line 6
CREATE OR REPLACE PROCEDURE padd(row1 rows_of, row2 rows_of)
IS
count_entry NUMBER:=row1.LAST;
count_test NUMBER:=row2.LAST;
dummby_row rows_of:=rows_of();
BEGIN
dummby_row:=row2;
IF (count_entry > count_test) THEN
FOR i IN row2.LAST + 1 ..row1.LAST
LOOP
dummby_row(i):='-' ;
END LOOP;
END IF;
END;
show error
This is the execution block I am sending:
DECLARE
row1 rows_of:=rows_of('3','7','2','3','-','-');
row2 rows_of:=rows_of('-','-','3');
answer rows_of;
BEGIN
padd(row1, row2);
END;
Could anyone help me out to where I am wrong? It has something to do with dummby_row(i):='-' ; but Ive tried different assignments and cannot get it to work.
Thanks in advance!
Stef

Answer 1

I've just seen this one pass elsewhere ;)
You assign row2 to dummby_row. Now dummby_row has no more records than row2, so your loop immediately goes wrong with the mentioned error. As a first line in the loop, add a
dummby_row.extend();MHE