Chengxiang Li created FLINK-3586:
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Summary: Risk of data overflow while use sum/count to calculate
AVG value
Key: FLINK-3586
URL: https://issues.apache.org/jira/browse/FLINK-3586
Project: Flink
Issue Type: Sub-task
Components: Table API
Reporter: Chengxiang Li
Priority: Minor
Now, we use {{(sum: Long, count: Long}} to store AVG partial aggregate data,
which may have data overflow risk, we should use unbounded data type(such as
BigInteger) to store them for necessary data types.
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