第二种安全策略规则类型是公开规则，它们指定在一个查询结果中可以公开哪些信息，以及公开结果对象的条件。

The second type of security policy rules, called disclosure rules, specifies what information can be disclosed in a query result and the conditions under which result objects are disclosed.

youdao

因此，获得最佳计划的准确性完全取决于关于查询中所涉及的数据库对象的最新统计信息。

So, the accuracy of getting an optimal plan is entirely dependant on the up-to-date statistical information about the database objects involved in the query.

youdao

可以根据需要把它们转换和组合为字符串格式，解析它们以寻找特定的字段值，使用它们查询对象的相关信息，使用它们获得完整的绑定，复制和释放它们。

They can be converted and composed into string formats, parsed for a particular field value, used to enquire about an object, resolve to get a complete binding, copied and freed as needed.

youdao