qiaojialin commented on a change in pull request #769: [IOTDB-452] Do all
aggregations of one series at one pass in GroupBy
URL: https://github.com/apache/incubator-iotdb/pull/769#discussion_r375091649
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File path:
server/src/main/java/org/apache/iotdb/db/query/dataset/groupby/GroupByWithoutValueFilterDataSet.java
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@@ -43,7 +46,17 @@
public class GroupByWithoutValueFilterDataSet extends GroupByEngineDataSet {
- private List<IAggregateReader> seriesReaders;
+ /**
+ * Merges same series to one map. For example: Given: paths: s1, s2, s3, s1
and aggregations:
+ * count, sum, count, sum seriesMap: s1 -> 0, 3; s2 -> 2; s3 -> 3
+ */
+ private Map<Path, List<Integer>> seriesReaders;
Review comment:
```suggestion
private Map<Path, List<Integer>> pathToAggrIndexes;
```
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