cloud-fan 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_r277978136
##########
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:
The problem only occurs for `AttributeReference`, which top level columns. I
think nested column is totally unrelated here.
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