PL/SQL Function error

Question

Hi Guys,
I've been getting driven a little crazy with this piece of code...
create or replace function "GetHeirachy" (current VARCHAR2) return VARCHAR2 is
     name VARCHAR2(4000);
     hold VARCHAR2(4000);
     parent VARCHAR2(4000);
BEGIN
     LOOP
     SELECT PARENT_ITEM_ID, ITEM_NAME INTO parent, name
     FROM HTMLDB_OARS.ITEM_REGISTER
     WHERE ITEM_ID = current;
     IF hold IS NULL THEN
          hold := name;
     ELSE
          hold := name || '/' || hold;
     END IF;
     current := parent;
          EXIT WHEN current IS NULL;
     END LOOP;
     RETURN hold;
END "GetHeirachy";
basically the table structure is a self referencing table that creates a heirachy effect, and i need to be able to return a string of "parent/child/grandchild" for display purposes, the function begins with the grandchild and then uses the references to collect each parent and add it to the return.
When i put the function into sql workshop it is fine but if i try soemthing as simple as
begin
htp.prn(GetHeirachy('34'));
end;
i get these errors;
ORA-06550: line 2, column 9:
PLS-00905: object HTMLDB_OARS.GETHEIRACHY is invalid
ORA-06550: line 2, column 1:
PL/SQL: Statement ignored1. begin
2. htp.prn(GETHEIRACHY('34'));
3. end;
Is there something simple wrong with my function code? pl/sql isn't my native language... and i don't know how to debug properly!
Cheers,
Alex

Answer 1

alright - code complete, i'll post it for the sake of others doing soemthing similar;
create or replace function GetHeirachy (current varchar2) return VARCHAR2 is
name VARCHAR2(4000);
hold VARCHAR2(4000);
parent VARCHAR2(4000);
cur VARCHAR2(4000);
BEGIN
cur := current;
for i in 1..10 LOOP
SELECT PARENT_ITEM_ID, ITEM_NAME INTO parent, name
FROM HTMLDB_OARS.ITEM_REGISTER
WHERE ITEM_ID = cur;
IF hold IS NULL THEN
hold := name;
ELSE
hold := name || '/' || hold;
END IF;
cur := parent;
EXIT WHEN cur IS NULL;
END LOOP;
RETURN hold;
END GetHeirachy;
:) - cheers for the help.