Github user tgravescs commented on the issue: https://github.com/apache/spark/pull/22144 @cloud-fan I disagree, it seems like you broke functionality that was there and you can't do that in a minor release. 3.0 would be fine to drop I think but we should fix it for 2.4, this PR was in a hope to get people to respond to see if the change was close to a fix, if we think this will work then he can add unit tests, otherwise I don't see a reason to waste time writing unit tests if the code changes are not going to be accepted. If I'm missing something please explain as you state this is a new feature but it certainly seems like a broken feature to me.
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