Github user dilipbiswal commented on a diff in the pull request:
https://github.com/apache/spark/pull/11297#discussion_r55589677
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/unresolved.scala
---
@@ -72,6 +72,19 @@ case class UnresolvedAttribute(nameParts: Seq[String])
extends Attribute with Un
override def sql: String = quoteIdentifier(name)
}
+/**
+ * Holds the name of columns referenced in an USING clause of JOIN source.
+ */
+case class UnresolvedUsingAttributes(usingCols: Seq[String])
--- End diff --
@marmbrus Thank you Michael. Good ideal. I will change it.
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