Display results as String: dosen't work based on the example

Question

Hello,
To understand how to display results as string, I tried to reproduce this:
[http://apex.oracle.com/pls/otn/f?p=31517:84|http://apex.oracle.com/pls/otn/f?p=31517:84]
I have my table emp
EMPNO ENAME JOB MGR HIREDATE SAL COMM DEPTNO
7839  KING PRESIDENT -  81-11-17 5000 -  10
7698 BLAKE MANAGER 7839 81-05-01 2850 -  30
7782 CLARK MANAGER 7839 81-06-09 2450 -  10
7566 JONES MANAGER 7839 81-04-02 2975 -  20
7788 SCOTT ANALYST 7566 82-12-09 3000 -  20
7902 FORD ANALYST 7566 81-12-03 3000 -  20
7369 SMITH CLERK 7902 80-12-17 800 -  20
7499 ALLEN SALESMAN 7698 81-02-20 1600 300 30
7521 WARD SALESMAN 7698 81-02-22 1250 500 30
7654 MARTIN SALESMAN 7698 81-09-28 1250 1400 30
7844 TURNER SALESMAN 7698 81-09-08 1500 0 30
7876 ADAMS CLERK 7788 83-01-12 1100 -  20
7900 JAMES CLERK 7698 81-12-03 950 -  30
7934 MILLER CLERK 7782 82-01-23 1300 -  10 I created with the wizard, on my page, a new REPORT REGION
- selected SQL RESULT -
- Name: Test
- Region Source Type: SQL Query
- Region Template: Report Region
IN Enter SQL Query or PL/SQL function returning a SQL Query, I COPY-PASTE the following code from [http://apex.oracle.com/pls/otn/f?p=31517:84|http://apex.oracle.com/pls/otn/f?p=31517:84]
DECLARE
   p_vc_arr2   htmldb_application_global.vc_arr2;
   p_string    VARCHAR2 (2000);
BEGIN
   SELECT ename
   BULK COLLECT INTO p_vc_arr2
     FROM emp
    WHERE deptno = :p84_select_deptno;
   p_string :=
     HTMLDB_UTIL.table_to_string (p_vc_arr2, ':');
   HTP.p (p_string);
END;AND I have this error:
+1 error has occurred+
Invalid query, no select statement found
Is not a PL/SQP functiion??
What do I do wrong?
thanks,
Roseline Paquin
Montreal, Canada

Answer 1

1 error has occurred
Invalid query, no select statement foundWhat if you try
DECLARE
   p_vc_arr2   htmldb_application_global.vc_arr2;
   p_string    VARCHAR2 (2000);
BEGIN
   SELECT ename
   BULK COLLECT INTO p_vc_arr2
     FROM emp
    WHERE deptno = :p84_select_deptno;
    return 'select ''' ||  HTMLDB_UTIL.table_to_string (p_vc_arr2, ':') || ''' str from dual';
END;??