Method set_materialized_derived

sql/table.h:3217–3228

    return (derived_type & DTYPE_MATERIALIZE);
  }
  void set_materialized_derived()
  {
    DBUG_ENTER("set_materialized_derived");
    DBUG_PRINT("enter", ("Alias: '%s'  Unit: %p",
                        (alias.str ? alias.str : "<NULL>"),
                         get_unit()));
    derived_type= static_cast<uint8>((derived_type &
                                      (derived ? DTYPE_MASK : DTYPE_VIEW)) |
                                     DTYPE_MATERIALIZE);
    set_check_materialized();
    DBUG_VOID_RETURN;
  }
  bool is_multitable() const { return (derived_type & DTYPE_MULTITABLE); }
  inline void set_multitable()
  {