Github user dongjoon-hyun commented on the issue: https://github.com/apache/spark/pull/21677 @wangyum . If you are still interested in reverting your PR as you mentioned in [SPARK-25339](https://issues.apache.org/jira/browse/SPARK-25339), please comment here about your thoughts and let us know. I believe that you are the best person to revert this.
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