Github user liyinan926 commented on the issue: https://github.com/apache/spark/pull/19954 > @liyinan926 we might be able to make the review smaller, though this makes some of the code we contribute on each push unusable on its own. @mccheah I think the biggest thing that makes reviewing this PR challenging is the way the code is structured, not the amount of changes. This PR is actually both shorter and conceptually simpler than the first two big ones, IMO. Unless we do a thorough refactoring of the code, I personally don't think splitting into smaller ones will help much on reducing the confusion. Splitting also risks making half baked feature into 2.3, which I personally don't think is a good idea.
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