Github user ueshin commented on a diff in the pull request: https://github.com/apache/spark/pull/22544#discussion_r220445443 --- Diff: sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/TypeCoercion.scala --- @@ -971,9 +971,38 @@ object TypeCoercion { case (ArrayType(fromType, true), ArrayType(toType: DataType, false)) => null case (ArrayType(fromType, false), ArrayType(toType: DataType, false)) - if !Cast.forceNullable(fromType, toType) => + if !Cast.forceNullable(fromType, toType) => --- End diff -- nit: revert this change.
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