Github user cloud-fan commented on the pull request: https://github.com/apache/spark/pull/10917#issuecomment-174874622 @nongli It's not doing anything to get the hash code of int field, but do a [simple multiplication and addition](https://github.com/apache/spark/blob/master/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/rows.scala#L153) to get the hash code of the row.
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