可能受到这种程度影响的服务的一个示例就是对具有良好索引的关系数据库进行简单的查询，在这里服务实现做了最小的处理。
An example of such a service that could be impacted to this degree is a simple inquiry into a well-indexed relation database where the service implementation does minimal processing.
它提供了远程数据的DB 2关系模型，并通过向远程数据源发送子查询以帮助联邦引擎实现查询处理。
It provides a DB2 relational model for the remote data and assists the federated engine in query processing by sending sub-queries to the remote data source.
DB 2 9.7中的查询优化技术能够提高针对XML数据的关系视图的查询处理效率。
Query optimization technology in DB2 9.7 provides increased efficiency for processing queries against relational views of XML data.
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