加载文件集的文件扫描保了留原始的数据槽文件名，因为并不需要按照特定顺序处理文件。
The load file set file scan retain the original slot file names, since it is not required to have a specific order for processing.
不要删除两个原始的数据集，因为表格仍然会使用它们来实现关系数据集。
Do not delete the two original data sets, because the report still USES them to populate the joint data set.
该插件甚至可以通过返回组名称（而不是原始用户集）来更改查询结果类型。
The plug-in can even change the query result type by returning, for example, a group name instead of the original set of users.
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