Kazuaki Ishizaki created SPARK-23893:

             Summary: Possible overflow in long = int * int
                 Key: SPARK-23893
                 URL: https://issues.apache.org/jira/browse/SPARK-23893
             Project: Spark
          Issue Type: Bug
          Components: Spark Core, SQL
    Affects Versions: 2.3.0
            Reporter: Kazuaki Ishizaki

To perform `int * int` and then to cast to `long` may cause overflow if the MSB 
of the multiplication result is `1`. In other words, the result would be 
negative due to sign extension.

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