peter-toth commented on code in PR #52305:
URL: https://github.com/apache/spark/pull/52305#discussion_r2341242682
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sql/core/src/main/scala/org/apache/spark/sql/execution/basicPhysicalOperators.scala:
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@@ -708,7 +708,9 @@ case class UnionExec(children: Seq[SparkPlan]) extends
SparkPlan {
val firstAttrs = children.head.output
val attributesMap = children.tail.map(_.output).map { otherAttrs =>
otherAttrs.zip(firstAttrs).map { case (attr, firstAttr) =>
- attr -> firstAttr
+ // Remove metadata and qualifier before comparing, as they may be
different
Review Comment:
Should we use `AttributeMap` instead of manual canonicalization?
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