Very slow searh products on admin/store/orders/%uc_order/product_select

I researched code and fix it for correct and quickly search product.

// ....

function uc_order_load_product_select($order) {
  $types = uc_product_types();

  if (!empty($_POST['search'])) {
    $search = check_plain($_POST['search']);
    // use drupal_strtolower for correctly working with unicode 
    $search = drupal_strtolower(str_replace('*', '%', $search));
    $search = '%'.trim($search, '%').'%';
    $search_args = array_merge($types, array($search, $search));

    $result = db_query("SELECT n.nid, n.title FROM {node} AS n LEFT JOIN "
                      ."{uc_products} AS p ON n.nid = p.nid WHERE n.type IN "
                      ."(". db_placeholders($types, 'varchar') .") AND (LOWER(n.title) LIKE '%s' OR LOWER(p.model) LIKE '%s')"
                      ." ORDER BY n.title", $search_args);
  }
  else {
    $result = db_query("SELECT nid, title FROM {node} WHERE type IN (". db_placeholders($types, 'varchar') .") "
                      ."ORDER BY title", $types);
  }
  while ($row = db_fetch_object($result)) {
    $options[$row->nid] = $row->title;
  }

  $output = drupal_get_form('uc_order_product_select_form', $order->order_id, $options);

  print $output;
  exit();
}

// ....