Chao Wang created IOTDB-5735:
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Summary: The result of adding the distinct function to the align
by device is incorrect.
Key: IOTDB-5735
URL: https://issues.apache.org/jira/browse/IOTDB-5735
Project: Apache IoTDB
Issue Type: Bug
Components: mpp-cluster
Affects Versions: 1.0.0
Reporter: Chao Wang
Currently, a storage group can contain a maximum of five RegionGroups. Data in
different time periods of the same sequence is allocated to different
RegionGroups using hash algorithm. In this case, data of the same sequence is
stored in different Region Groups.
According to the execution plan of the distinct + align by device syntax,
distinct data is delivered to multiple region groups for execution and then
summarized and returned. During the summarization, distinct processing is not
performed. As a result, duplicate data exists between multiple region groups.
!https://clouddevops.huawei.com/vision-file-storage/api/file/download/upload-v2/2023/2/27/w00549253/b70e9e8244d845f58c3891fe54c20571/image.png!
!https://clouddevops.huawei.com/vision-file-storage/api/file/download/upload-v2/2023/2/27/w00549253/90246c3a906c44fc8422b839ba27c8d2/image.png!
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