Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/13399#discussion_r65454175
--- Diff: sql/core/src/test/scala/org/apache/spark/sql/DatasetSuite.scala
---
@@ -783,6 +783,16 @@ class DatasetSuite extends QueryTest with
SharedSQLContext {
ds.filter(_.b > 1).collect().toSeq
}
}
+
+ test("transformed dataset correctly solve the attributes") {
+ val dataset = Seq(1, 2, 3).toDS()
+ val ds1 = dataset.map(_ + 1)
--- End diff --
nit: I'd like it to be:
```
val ds = Seq(1, 2, 3).toDS().map(_ + 1)
val d1 = ds.as("d1")
val d2 = ds.as("d2")
...
```
and the test name can be: `mapped dataset should resolve duplicated
attributes for self join and set operations`
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