Github user rxin commented on the pull request:
https://github.com/apache/spark/pull/10435#issuecomment-168047956
On the contrary I think we should consider not using hash code on an
object, and always use hash code expression for two reasons:
1. We still need a hash function
2. We get code gen using an expression
3. It is easier to control (being able to pass a seed or use it for bloom
filters)
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