function getAdsStats($aParams, $allFields = false)
 {
     $aAds = Admin_DA::_getEntities('ad', $aParams);
     $aAdsStats = Admin_DA::_getEntitiesStats('ad', $aParams);
     foreach ($aAds as $adId => $aAd) {
         foreach (array('sum_requests', 'sum_views', 'sum_clicks', 'sum_conversions') as $item) {
             $aAds[$adId][$item] = !empty($aAdsStats[$adId][$item]) ? $aAdsStats[$adId][$item] : 0;
         }
     }
     return $aAds;
 }