text: --Test db_class using create class and retrieve relative information
  create class test_class(col1 integer);
  insert into test_class values(999);
  insert into test_class values(888);
  
  select class_name, owner_name, 
         class_type,is_system_class, 
         partitioned 
  from   db_class
  where  class_name = 'test_class';
  
  drop class test_class;