Github user dilipbiswal commented on the issue:
https://github.com/apache/spark/pull/22314
@ueshin Just verified in 2.3. This problem does not exist in 2.3. This is
due to the fact that implementation of `nullSafeCodeGen` is different in 2.3
than in master. However, we are missing the test cases we added in these PRs in
2.3. Should we have the test cases checked in into the branch ? I am afraid
that if we ever backported the pr that changed nullSafeCodeGen , we may
introduce this bug. Please advise ..
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