The regular expression argument is the routing mechanism.
正则表达式参数是路由机制。
Note: the query optimizer considers using a functional index when the index expression is used in a relational expression or as an argument to one of the operator class functions.
注意:当索引表达式被用于关系表达式,或作为某个操作符类函数的参数时,查询优化器将考虑使用函数索引。
To create a Pattern, you must call its compile , passing a regular expression as an argument.
要创建Pattern,必须调用它的compile,同时传递一个正则表达式作为参数。
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