hvanhovell commented on a change in pull request #28223: [SPARK-31450][SQL] 
Make ExpressionEncoder thread-safe
URL: https://github.com/apache/spark/pull/28223#discussion_r408705978
 
 

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 File path: 
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/ExpressionEncoder.scala
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 @@ -384,7 +407,7 @@ case class ExpressionEncoder[T](
 
   override def toString: String = s"class[$schemaString]"
 
-  override def makeCopy: ExpressionEncoder[T] = copy()
+  override def makeCopy: ExpressionEncoder[T] = this
 
 Review comment:
   No. I can try to remove it, but we might break a 'public' API.

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