Github user gczsjdy commented on a diff in the pull request:
https://github.com/apache/spark/pull/20010#discussion_r157926754
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/TypeCoercion.scala
---
@@ -99,6 +99,17 @@ object TypeCoercion {
case (_: TimestampType, _: DateType) | (_: DateType, _: TimestampType)
=>
Some(TimestampType)
+ case (t1 @ ArrayType(pointType1, nullable1), t2 @
ArrayType(pointType2, nullable2))
+ if t1.sameType(t2) =>
+ val dataType = findTightestCommonType(pointType1, pointType2).get
--- End diff --
Thanks for your illustration.
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