WebSphere Federation Server USES its cost based optimizer in order to determine the optimal access path to retrieve and process the data.
WebSphere Federation Server使用它的基于成本的优化器，确定检索和处理数据的最佳路径。
This set is input to the cost-based optimizer that decides whether to use any of the eligible indexes or not.
将该组索引输入到基于成本的优化器，这个优化器决定是否使用任何合适的索引。
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