[GitHub] [spark] dilipbiswal commented on a change in pull request #24442: [SPARK-27547][SQL] fix DataFrame self-join problems

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dilipbiswal commented on a change in pull request #24442: [SPARK-27547][SQL] fix DataFrame self-join problems
URL: https://github.com/apache/spark/pull/24442#discussion_r277974738
 
 

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 File path: sql/core/src/test/scala/org/apache/spark/sql/DataFrameJoinSuite.scala
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 @@ -117,6 +117,57 @@ class DataFrameJoinSuite extends QueryTest with SharedSQLContext {
         .collect().toSeq)
   }
 
+  test("join - self join without manual alias") {
 
 Review comment:
   @cloud-fan Could we add some tests for nested columns ? In case of nested columns, do we need to carry more metadata ?

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