Problem with DBMS_OUTPUT and SQL statment with a function

Question

I am using SQL Developer version 3.0.04 and I have a function that has a dbms_output statment in it. I am running the following SQL to select the output of that statment.
select A.A_FUCTION('TEST') from dual;
The output works fine but the dbms_output line does not show in the dbms_output window. I turned on the output window etc. and i can get the select to print out the output if i wrap it in a declare begin end wrapper... and then change the query to insert the return value into variable.
just wondering if there is way to get the dbms_output to flush out with just an SQL statment instead of in a begin end wrapper etc.

Answer 1

just wondering if there is way to get the dbms_output to flush out with just an SQL statment instead of in a begin end wrapper etc.works fine in sql*plus, so I guess it must be a preference or sth. in sql*developer:
SQL> set serverout on
SQL> create or replace function f1 (r int)
  2    return int
  3  as
  4  begin
  5    dbms_output.put_line ('Hello World ' || r);
  6    return r;
  7  end f1;
  8  /
Function created.
SQL>
SQL> select f1 (rownum) f1 from dual connect by level <= 3
  2  /
        F1
         1
         2
         3
3 rows selected.
Hello World 1
Hello World 2
Hello World 3
SQL>