陈子陵 created IOTDB-2501:
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Summary: Fix FirstValueAggrResult and add a test case in
GroupByLevelDataSetTest
Key: IOTDB-2501
URL: https://issues.apache.org/jira/browse/IOTDB-2501
Project: Apache IoTDB
Issue Type: Bug
Components: Core/Query
Affects Versions: master branch
Reporter: 陈子陵
Fix For: master branch
The behaviour of FirstValueAggrResult.updateResultUsingValues() and
LastValueDescAggrResult.updateResultUsingValues() should be the same.
This issue try to fix it, and add a test case in GroupByLevelDataSetTest.java
the test case is like "select first_value(s0) from root.** where s0!=0 or
time<10 group by level=3". The result before the fix is wrong.
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