Notice that an equivalent query is simply not possible to express in JPQL, because it has a defined grammar with a fixed number of supported expressions. 注意,在JPQL中不能表达等效的查询,因为它的语法仅支持固定数量的表达式。
The equivalent relation and transformation method of regular grammar, nfa, dfa, state transition diagram and regular expression 正规文法、NFA、DFA、状态转换图、正规式之间的等价变换关系及变换方法