Github user kiszk commented on the issue: https://github.com/apache/spark/pull/21537 @gatorsmile Thank you for your reply. Could you elaborate on your suggestion? >A general suggestion. To avoid introducing the regressions, how about implementing a new one without changing the existing one? We can easily switch to the new one when it becomes stable. Does it mean to work in a particular branch or to work in a fork repository until its implementation has been completed ?
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