text: -- @Description Tests that DML operatins change the modification count.
  -- 
  
  SELECT state, tupcount, modcount FROM gp_aoseg_name('ao');
  INSERT INTO ao VALUES (11, 11);
  SELECT state, tupcount, modcount FROM gp_aoseg_name('ao');
  DELETE FROM ao WHERE a = 11;
  SELECT state, tupcount, modcount FROM gp_aoseg_name('ao');
  UPDATE AO SET b = 0 WHERE a = 10;
  SELECT state, tupcount, modcount FROM gp_aoseg_name('ao');
  