maropu opened a new pull request #23508: [SPARK-21351][SQL] Remove the UpdateAttributeNullability rule from the optimizer URL: https://github.com/apache/spark/pull/23508 ## What changes were proposed in this pull request? This pr removed `UpdateAttributeNullability` from the optimizer because the same logic happens in the analyzer. See SPARK-26459(#23390) for more detailed discussion. ## How was this patch tested? N/A
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