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Posted to reviews@spark.apache.org by GitBox <gi...@apache.org> on 2019/03/29 16:55:59 UTC
[GitHub] [spark] cloud-fan commented on issue #23726: [SPARK-26812][SQL]
Report correct nullability for complex datatypes in Union
cloud-fan commented on issue #23726: [SPARK-26812][SQL] Report correct nullability for complex datatypes in Union
URL: https://github.com/apache/spark/pull/23726#issuecomment-478072482
So this patch does fix the problem, but my concern is, picking the first child's output as output is pretty tricky. Before adding more tricks to it, I'm thinking about if there is a way to fix the problem entirely, by always using a new seq of attr IDs as the output.
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