viirya commented on issue #23474: [SPARK-26551][SQL] Fix schema pruning error when selecting one complex field and having is not null predicate on another one URL: https://github.com/apache/spark/pull/23474#issuecomment-452164215 I think It is harder to mark `name.middle` as `contentAccessed = false`. It is true we can check all field accesses and see if `middle` is not accessed by others. But I feel it is more difficult to do that and current fix is simpler.
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