Github user jiangxb1987 commented on a diff in the pull request:
https://github.com/apache/spark/pull/18095#discussion_r118361491
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/exchange/ShuffleExchange.scala
---
@@ -47,7 +47,7 @@ case class ShuffleExchange(
val extraInfo = coordinator match {
case Some(exchangeCoordinator) =>
s"(coordinator id:
${System.identityHashCode(exchangeCoordinator)})"
- case None => ""
+ case _ => ""
--- End diff --
Let's do it then, that will enable future readers easier to understand the
code.
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