California Code
CHAPTER 1 - Appeals in General
Section 904.3.

904.3. An appeal shall not be taken from a judgment of the appellate division of a superior court granting or denying a petition for issuance of a writ of mandamus or prohibition directed to the superior court, or a judge thereof, in a limited civil case or a misdemeanor or infraction case. An appellate court may, in its discretion, upon petition for extraordinary writ, review the judgment.

(Added by Stats. 2007, Ch. 43, Sec. 11. Effective January 1, 2008.)