cloud-fan commented on a change in pull request #32972:
URL: https://github.com/apache/spark/pull/32972#discussion_r656259414
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File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/ResolveUnion.scala
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@@ -182,6 +182,15 @@ object ResolveUnion extends Rule[LogicalPlan] {
// union have consistent schema.
aliased += foundAttr
Alias(addFields(foundAttr, target), foundAttr.name)()
+ case (source: StructType, target: StructType)
Review comment:
how do we handle different column order for top-level columns?
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