dongjoon-hyun commented on a change in pull request #33070:
URL: https://github.com/apache/spark/pull/33070#discussion_r659261525
##########
File path:
sql/catalyst/src/main/scala-2.12/org/apache/spark/sql/catalyst/expressions/AttributeMap.scala
##########
@@ -50,4 +50,6 @@ class AttributeMap[A](val baseMap: Map[ExprId, (Attribute,
A)])
override def iterator: Iterator[(Attribute, A)] = baseMap.valuesIterator
override def -(key: Attribute): Map[Attribute, A] = baseMap.values.toMap -
key
+
+ def ++(other: AttributeMap[A]): AttributeMap[A] = new AttributeMap(baseMap
++ other.baseMap)
Review comment:
This is fixing `src/main/scala-2.12` only. We need to do the same thing
for `src/main/scala-2.13`.
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