Github user ueshin commented on a diff in the pull request: https://github.com/apache/spark/pull/21713#discussion_r200319604 --- Diff: sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/TypeCoercion.scala --- @@ -166,6 +166,30 @@ object TypeCoercion { case (l, r) => None } + private def mergeComplexTypes( + t1: DataType, + t2: DataType, --- End diff -- The test result might be wrong?
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