Cheng Lian created SPARK-12335:
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Summary: CentralMomentAgg should be nullable
Key: SPARK-12335
URL: https://issues.apache.org/jira/browse/SPARK-12335
Project: Spark
Issue Type: Bug
Components: SQL
Affects Versions: 1.6.0, 2.0.0
Reporter: Cheng Lian
Assignee: Cheng Lian
According to the {{getStatistics}} method overriden in all its subclasses,
{{CentralMomentAgg}} should be nullable.
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