* aside from read-only automatic transactions (assuming no callbacks are registered).
* If a transaction is still open anyway, it will be rolled back.
*
+ * @param string $fname Caller name
+ * @param int|null $owner ID of the calling instance (e.g. the LBFactory ID)
* @return bool Success
* @throws DBError
*/
- public function close();
+ public function close( $fname = __METHOD__, $owner = null );
/**
* Run an SQL query and return the result