Haimei Guo created IOTDB-1386:
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             Summary: server - last, align by device bug
                 Key: IOTDB-1386
                 URL: https://issues.apache.org/jira/browse/IOTDB-1386
             Project: Apache IoTDB
          Issue Type: Bug
            Reporter: Haimei Guo
         Attachments: image-2021-05-21-14-11-17-301.png

To my understanding, LAST and FILL should not be used together, but it executes 
fine. 
When add ALIGN BY DEVICE, LAST seems to be not working.

SQL as following:

- select last s3,s3 from root.sg1.d1 where time=600 
fill(double[previous],double[linear]) align by device

- select last s3,s3 from root.sg1.d1 where time=600 
fill(double[previous],double[linear])

- select last s3,s3 from root.sg1.d1 where time=600 align by device

!image-2021-05-21-14-11-17-301.png!



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