Github user marmbrus commented on a diff in the pull request:
https://github.com/apache/spark/pull/4929#discussion_r27183703
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/basicOperators.scala
---
@@ -134,6 +134,16 @@ case class CreateTableAsSelect[T](
override lazy val resolved = databaseName != None && childrenResolved
}
+/**
+ * @param child The final query of this CTE
--- End diff --
`A container for holding named common table expressions (CTEs) and a query
plan. This operator will be removed during analysis and the relations will be
substituted into `child`.`
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