text: --[er]test operators superseteq with list type
  create class tb1 ( a list);
  create class tb2 ( b list);
  
  insert into tb1 values({1,'a'});
  insert into tb1 values({2,'b'});
  
  insert into tb2 values({1,'a'});
  insert into tb2 values({2,'b'});
  insert into tb2 values({3,'c'});
  
  select a,b from tb1, tb2 where a superseteq b order by 1,2;
  
  
  drop class tb1;
  drop class tb2;
  