MySQL stored procedure the reason of rollback

Question

MySQL stored procedure will throw the error out if there is no rollback command for SQLEXCEPTION, but it has changed some data before the exception.
I add rollback command for SQL exceptions:

DECLARE EXIT HANDLER FOR SQLEXCEPTION 
BEGIN
    ROLLBACK; 
END;

But I can not know the reason of the rollback now.
I know we can define every SQL exception and it's handler, but it's too complex and I just want to know why the rollback occurred.
Is there a simple method to get the reason of rollback in MySQL stored procedure?

Answer 1

Thanks @kordirko. I have get one solution with RESIGNAL. But it is only supported until MySQL 5.5.

DECLARE EXIT HANDLER FOR SQLEXCEPTION
BEGIN
  SET @flag = 1;
  IF @flag = 1 THEN RESIGNAL;END IF;
  ROLLBACK;
END;