jixuan1989 edited a comment on issue #713: [IOTDB-418] New series reader URL: https://github.com/apache/incubator-iotdb/pull/713#issuecomment-586736528 the dataset package structure is not clear: ``` server/src/main/java/org/apache/iotdb/db/query/dataset/ ├── AlignByDeviceDataSet.java ├── EngineDataSetWithValueFilter.java ├── ListDataSet.java ├── NonAlignEngineDataSet.java ├── RawQueryDataSetWithoutValueFilter.java ├── SingleDataSet.java └── groupby ├── GroupByEngineDataSet.java ├── GroupByWithValueFilterDataSet.java └── GroupByWithoutValueFilterDataSet.java ``` So, what SQL that ListDataSet and SingleDataSet are for? Why two Filters are Datasets? Add comments in these classes.
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