text: --Create trigger without instance attribute and retrieve the information from virtual class db_trig
  
  create class test_class(col1 integer, col2 varchar(20));
  insert into test_class values(999,'nhn');
  create trigger test_trigger
    after commit
    execute print 'commit all uncommit transcation';
    
  select trigger_name, 
         target_class_name,
         target_attr_name,
         target_attr_type
  from   db_trig
  where  trigger_name = 'test_trigger';
  
  drop trigger test_trigger;
  drop class test_class;
  