多级安全查询处理器必须保证用户的查询不违反数据库系统安全性的要求。
It supports querying by security level and must ensure that user's querying will not violate the security requirements of database.
多级安全查询处理器是多级安全数据库的核心部分，它提供对安全级查询的支持。
The distributed data query is the core of the distributed database managing system, but the optimized query algorithm is the key technology in query processing.
auditorAware是引用的Spring Bean，需要实现AuditorAware接口，通常是实现针对当前用户的安全查询功能。
The referenced Spring bean auditorAware has to implement the AuditorAware interface that you'd typically implement querying your security module for the current user.
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