int Item::save_in_field(Field *field, bool no_conversions)
{
  int error= type_handler()->Item_save_in_field(this, field, no_conversions);
  return error ? error : (field->table->in_use->is_error() ? 1 : 0);
}
int Item::save_in_field(Field *field, bool no_conversions)
{
  int error= type_handler()->Item_save_in_field(this, field, no_conversions);
  return error ? error : (field->table->in_use->is_error() ? 1 : 0);
}