Github user bdrillard commented on a diff in the pull request: https://github.com/apache/spark/pull/20010#discussion_r159675261 --- Diff: sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/TypeCoercion.scala --- @@ -99,11 +100,22 @@ object TypeCoercion { case (_: TimestampType, _: DateType) | (_: DateType, _: TimestampType) => Some(TimestampType) + case (t1 @ ArrayType(pointType1, nullable1), t2 @ ArrayType(pointType2, nullable2)) --- End diff -- Sure, see #09e49fb8162b97dec76a6324fa4fac4553b22013
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