每一个节点上显示的数字都是优化器对基础数据源或操作节点的基数的估计。
The number shown in each node is the optimizer's estimate for the cardinality of the underlying data source or operation node.
数据问题可能在客户的操作数据源中存在多年。
Data problems may have existed in the customer? S operational data sources for years.
支持对此集成视图的写访问时，联合服务器必须将各个源中的数据操作同步到逻辑工作单元中。
When supporting write access to this integrated view, the federation server must synchronize the manipulation of data in the various sources into a logical unit of work.
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