mgaido91 commented on issue #23726: [SPARK-26812][SQL] Report correct nullability for complex datatypes in Union URL: https://github.com/apache/spark/pull/23726#issuecomment-478075069 @cloud-fan I am not I 100% get your comment. I don't see the relationship between creating new attribute IDs and reporting the correct nullabilty for nested fields. I think just creating new IDs/attributes doesn't solve/is not related to this issue, but maybe I am missing something...
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