What is the effect of section 904.1, subdivision (a) of the One Final Judgment Rule?

Section 904.1, subdivision (a), codifies the one final judgment rule, for it authorizes an appeal "[f]rom a judgment, except ... an interlocutory judgment." There are sound reasons for the rule. (Morehart v. County of Santa Barbara, supra, 7 Cal.4th at p. 741, fn. 9, 29 Cal.Rptr.2d 804, 872 P.2d 143.)

"As explained in Kinoshita v. Horio [ (1986) ] 186 Cal.App.3d 959 [231 Cal.Rptr. 241], '[t]hese include the obvious fact that piecemeal disposition and multiple appeals tend to be oppressive and costly. [Citing, inter alia, Knodel v. Knodel [ (1975) ] 14 Cal.3d 752, 766 [122 Cal.Rptr. 521, 537

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