public function rawQuery($query_string)
	{
		try{
			//execute the sql query and return response object
		 	$result = $this->connector->execute($query_string);

			//check if the query return an error and throw exception
			if ( $result === false ) 
			{
				//throw exception
				throw new MySQLException(get_class(new MySQLException) . ' ' .$this->connector->lastError() . '<span class="query-string"> (' . $query_string . ') </span>');

			}

			else return $result;

		}

		catch(MySQLException $MySQLExceptionObject){

			$MySQLExceptionObject->errorShow();
		}

	}