PL/SQL: handling of empty string (strange)

Hi everybody,

I've got this code-sample here which puzzles me:

declare
  s VARCHAR2(1):='S';
begin
  dbms_output.put_line(s);
  if s!='' then
    dbms_output.put_line('hoppla');
  else
    dbms_output.put_line('ballaballa');
  end if;
end;
/   

When run the program enters the else-branch. But why - 'S'!='' must certainly be true!?

Thanks,
Stephan Received on Thu Mar 11 2004 - 08:47:06 CST