Github user asfgit closed the pull request at:
https://github.com/apache/spark/pull/17347
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GitHub user maropu opened a pull request:
https://github.com/apache/spark/pull/17347
[SPARK-19980][SQL] Add NULL checks in Bean serializer
## What changes were proposed in this pull request?
A Bean serializer in `ExpressionEncoder` could change values when Beans
having NULL. A
