Github user srowen commented on a diff in the pull request:
https://github.com/apache/spark/pull/22908#discussion_r230060094
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/v2/DataSourceV2Relation.scala
---
@@ -56,7 +56,7 @@ case class DataSourceV2Relation(
override def pushedFilters: Seq[Expression] = Seq.empty
- override def simpleString: String = "RelationV2 " + metadataString
+ override def simpleString: String = s"$nodeName " + metadataString
--- End diff --
This uses interpolation and concatenation - just interpolate
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