Kaifeng Xue created IOTDB-327:
---------------------------------

             Summary: Group by without value filter skip page logic is wrong
                 Key: IOTDB-327
                 URL: https://issues.apache.org/jira/browse/IOTDB-327
             Project: Apache IoTDB
          Issue Type: Bug
            Reporter: Kaifeng Xue


Our group by logic doesn't use window to judge whether we can skip page but use 
time filter to skip. This will cause use wrong page header. 
If you want to reproduce this bug, you can add a "flush" statement after this 
code in 
"/server/src/test/java/org/apache/iotdb/db/integration/IOTDBGroupByIT.java"
```
"INSERT INTO root.ln.wf01.wt01(timestamp,temperature,status, hardware) "
          + "values(150, 200.2, true, 220)",
```
The test called "countSumAvgTest" will fail






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