Github user marmbrus commented on a diff in the pull request:
https://github.com/apache/spark/pull/11297#discussion_r56056454
--- Diff: sql/core/src/test/scala/org/apache/spark/sql/SQLQuerySuite.scala
---
@@ -2178,4 +2178,62 @@ class SQLQuerySuite extends QueryTest with
SharedSQLContext {
Row(4) :: Nil)
}
}
-}
+
+ test("join with using clause") {
+ val df1 = Seq(("r1c1", "r1c2", "t1r1c3"),
+ ("r2c1", "r2c2", "t1r2c3"), ("r3c1x", "r3c2", "t1r3c3")).toDF("c1",
"c2", "c3")
+ val df2 = Seq(("r1c1", "r1c2", "t2r1c3"),
+ ("r2c1", "r2c2", "t2r2c3"), ("r3c1y", "r3c2", "t2r3c3")).toDF("c1",
"c2", "c3")
+ val df3 = Seq((null, "r1c2", "t3r1c3"),
+ ("r2c1", "r2c2", "t3r2c3"), ("r3c1y", "r3c2", "t3r3c3")).toDF("c1",
"c2", "c3")
+ withTempTable("t1", "t2", "t3") {
+ df1.registerTempTable("t1")
+ df2.registerTempTable("t2")
+ df3.registerTempTable("t3")
+ // inner join with one using column
+ checkAnswer(
+ sql("SELECT * FROM t1 join t2 using (c1)"),
+ Row("r1c1", "r1c2", "t1r1c3", "r1c2", "t2r1c3") ::
+ Row("r2c1", "r2c2", "t1r2c3", "r2c2", "t2r2c3") :: Nil)
+
+ // inner join with two using columns
+ checkAnswer(
+ sql("SELECT * FROM t1 join t2 using (c1, c2)"),
+ Row("r1c1", "r1c2", "t1r1c3", "t2r1c3") ::
+ Row("r2c1", "r2c2", "t1r2c3", "t2r2c3") :: Nil)
+
+ // Left outer join with one using column.
+ checkAnswer(
+ sql("SELECT * FROM t1 left join t2 using (c1)"),
+ Row("r1c1", "r1c2", "t1r1c3", "r1c2", "t2r1c3") ::
+ Row("r2c1", "r2c2", "t1r2c3", "r2c2", "t2r2c3") ::
+ Row("r3c1x", "r3c2", "t1r3c3", null, null) :: Nil)
+
+ // Right outer join with one using column.
+ checkAnswer(
+ sql("SELECT * FROM t1 right join t2 using (c1)"),
+ Row("r1c1", "r1c2", "t1r1c3", "r1c2", "t2r1c3") ::
+ Row("r2c1", "r2c2", "t1r2c3", "r2c2", "t2r2c3") ::
+ Row("r3c1y", null, null, "r3c2", "t2r3c3") :: Nil)
+
+ // Full outer join with one using column.
+ checkAnswer(
+ sql("SELECT * FROM t1 full outer join t2 using (c1)"),
+ Row("r1c1", "r1c2", "t1r1c3", "r1c2", "t2r1c3") ::
+ Row("r2c1", "r2c2", "t1r2c3", "r2c2", "t2r2c3") ::
+ Row("r3c1x", "r3c2", "t1r3c3", null, null) ::
+ Row("r3c1y", null,
+ null, "r3c2", "t2r3c3") :: Nil)
+
+ // Full outer join with null value in join column.
+ checkAnswer(
+ sql("SELECT * FROM t1 full outer join t3 using (c1)"),
+ Row("r1c1", "r1c2", "t1r1c3", null, null) ::
+ Row("r2c1", "r2c2", "t1r2c3", "r2c2", "t3r2c3") ::
+ Row("r3c1x", "r3c2", "t1r3c3", null, null) ::
+ Row("r3c1y", null, null, "r3c2", "t3r3c3") ::
+ Row(null, null, null, "r1c2", "t3r1c3") :: Nil)
+ }
+ }
+ }
--- End diff --
Nit: indent.
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