即，通过连接谓词，CUST_INTEREST 表的选择性非常强。
That is, table CUST_INTEREST could be very selective through the join predicate.
类似地，可以选择性添加一个源连接来提供细分的输入上下文。
Similarly, you can optionally add a source connection to provide the input context of the refinement.
首先在逻辑上将表与其自身连接，然后将更具有选择性的非起始索引键作为索引绑定过滤器，应用于起始键值的每个惟一的组合。
The table is logically joined to itself, and the more selective non-leading index keys are applied as index bound filters to each unique combination of the leading key values.
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