public function loadResult($params=array()) {
		
		$this->openConnection();
		
		$res = NULL;

		try {

			$stat = $this->handler->prepare($this->query);
			$stat->execute((array)$params);
			
			// logger
			$count = $this->handler->query('SELECT FOUND_ROWS()')->fetchColumn();
			$this->logParamQuery($this->query, $count, $params);
			$res = $stat->fetch(\PDO::FETCH_COLUMN);	
		
		} catch (\PDOException $e) {

			$this->handleException($e, $params);

		}
		
		$stat->closeCursor();

		return $res;
		
	}