Получение всех товаров, которые имеют скидку

$arElements = GET_SALE_FILTER(); 
global $searchFilter;
      $searchFilter = array(
         "=ID" => $arElements,
      );
      $APPLICATION->IncludeComponent(
         "bitrix:catalog.section",
         "template",
         array(
               ...   
                "FILTER_NAME" => "searchFilter",
               ...
            ),
      );

function GET_SALE_FILTER(){
      global $DB;

      $arDiscountElementID = array();
      $dbProductDiscounts = CCatalogDiscount::GetList(
         array("SORT" => "ASC"),
         array(
            "ACTIVE" => "Y",
            "!>ACTIVE_FROM" => $DB->FormatDate(date("Y-m-d H:i:s"),
                  "YYYY-MM-DD HH:MI:SS",
                  CSite::GetDateFormat("FULL")),
            "!<ACTIVE_TO" => $DB->FormatDate(date("Y-m-d H:i:s"),
                  "YYYY-MM-DD HH:MI:SS",
                  CSite::GetDateFormat("FULL")),
         ),
         false,
         false,
         array(
            "ID", "SITE_ID", "ACTIVE", "ACTIVE_FROM", "ACTIVE_TO",
            "RENEWAL", "NAME", "SORT", "MAX_DISCOUNT", "VALUE_TYPE",
            "VALUE", "CURRENCY", "PRODUCT_ID"
         )
      );
      while ($arProductDiscounts = $dbProductDiscounts->Fetch())
      {
         if($res = CCatalogDiscount::GetDiscountProductsList(array(), array(">=DISCOUNT_ID" => $arProductDiscounts['ID']), false, false, array())){
            while($ob = $res->GetNext()){
               if(!in_array($ob["PRODUCT_ID"],$arDiscountElementID))
                  $arDiscountElementID[] = $ob["PRODUCT_ID"];
            }}
      }

      return $arDiscountElementID;

   }