  Check_level_instant_set(THD *thd, enum_check_fields temporary_value)
   :m_thd(thd), m_check_level(thd->count_cuted_fields)
  {
    thd->count_cuted_fields= temporary_value;
  }
  Check_level_instant_set(THD *thd, enum_check_fields temporary_value)
   :m_thd(thd), m_check_level(thd->count_cuted_fields)
  {
    thd->count_cuted_fields= temporary_value;
  }