[jira] [Created] (IOTDB-652) Group By Fill Null Pointer Bug

[Yuan Tian (Jira)]

Yuan Tian created IOTDB-652:
-------------------------------

             Summary: Group By Fill Null Pointer Bug
                 Key: IOTDB-652
                 URL: https://issues.apache.org/jira/browse/IOTDB-652
             Project: Apache IoTDB
          Issue Type: Bug
          Components: Core/Engine
            Reporter: Yuan Tian
            Assignee: Yuan Tian


While I execute

```

select last_value(temperature) from root.ln.wf01.wt01 GROUP BY ([17, 48), 5ms) 
FILL(float[previousUntilLast])

```

if the actual type of temperature is not float, it will throw null pointer 
exception.

However, each type should have its own default fill way.



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