karenfeng commented on a change in pull request #31666:
URL: https://github.com/apache/spark/pull/31666#discussion_r587588428
##########
File path: sql/core/src/test/scala/org/apache/spark/sql/DataFrameJoinSuite.scala
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@@ -477,4 +477,26 @@ class DataFrameJoinSuite extends QueryTest
checkAnswer(df3.except(df4), Row(10, 50, 2, Row(10, 50, 2)))
}
+
+ test("SPARK-34527: Resolve common columns from USING JOIN") {
+ val joinDf = testData2.as("testData2").join(
+ testData3.as("testData3"), usingColumns = Seq("a"), joinType =
"fullouter")
+ val dfQuery = joinDf.select(
+ $"a", $"testData2.a", $"testData2.b", $"testData3.a", $"testData3.b")
+ val dfQuery2 = joinDf.select(
Review comment:
These demonstrate that the behavior now works in Scala.
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