How have the courts interpreted a jury waiver?

The prosecutor who took the jury waiver informed appellant that he had "an absolute right to a trial by jury." He explained the difference between a jury trial and a court trial, and told appellant that he had a right to a jury trial on the issues of guilt or innocence and truth of the prior felony convictions alleged against him. Appellant did not object to the court trial nor indicate, in any manner, that he was confused or misled. Instead, he expressly waived a jury on the issue of guilt and then sat quietly when his counsel subsequently stipulated to submit the issue of sanity on the evidence taken during the court trial. This scenario clearly indicates that the advice and waiver was intended to cover all trial issues. (See People v. Casarez (1981) 124 Cal.App.3d 641, 650, 177 Cal.Rptr. 451.)