dongjoon-hyun commented on a change in pull request #29172:
URL: https://github.com/apache/spark/pull/29172#discussion_r457773370
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File path:
sql/catalyst/src/main/scala-2.12/org/apache/spark/sql/catalyst/util/CaseInsensitiveMap.scala
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@@ -40,7 +40,7 @@ class CaseInsensitiveMap[T] private (val originalMap:
Map[String, T]) extends Ma
keyLowerCasedMap.contains(k.toLowerCase(Locale.ROOT))
override def +[B1 >: T](kv: (String, B1)): Map[String, B1] = {
- new CaseInsensitiveMap(originalMap + kv)
+ new CaseInsensitiveMap(originalMap.filter(!_._1.equalsIgnoreCase(kv._1)) +
kv)
Review comment:
Please note that this is basically reusing the same logic for `deletion`
at line 49.
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