HyukjinKwon commented on issue #23719: [SPARK-26808][SQL] Pruned schema should not change nullability URL: https://github.com/apache/spark/pull/23719#issuecomment-459694885 > Even we can't get a not-nullable column when reading from a parquet file @viirya, I think we are able to get a non-nullable column via structured streaming if the codes have not been changed sine I read it.
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