BEGIN 
   sys.DBMS_OUTPUT.put_line (DBMS_ASSERT.schema_name ('HR')); 
END; 

BEGIN 
   sys.DBMS_OUTPUT.put_line (DBMS_ASSERT.sql_object_name ('EMPLOYEES')); 
END; 

BEGIN 
   sys.DBMS_OUTPUT.put_line (DBMS_ASSERT.qualified_sql_name  ('HR.EMPLOYEES')); 
END; 

BEGIN 
   sys.DBMS_OUTPUT.put_line (DBMS_ASSERT.schema_name ('HR')); 
END; 

BEGIN 
   sys.DBMS_OUTPUT.put_line (DBMS_ASSERT.schema_name ('WHO_ME')); 
END; 

BEGIN 
   DBMS_OUTPUT.put_line ( 
      DBMS_ASSERT.sql_object_name ( 
         'EMPLOYEES, (SELECT * FROM ALL_USERS) u')); 
END;