Github user gatorsmile commented on the pull request:
https://github.com/apache/spark/pull/12214#issuecomment-214972960
@hvanhovell It sounds like something is wrong?
```scala
test("left anti join") {
val df = Seq(1, 3).toDF("int")
val df2 = Seq(1, 5).toDF("int2")
checkAnswer(
df.as("a").join(df2.as("b"), $"a.int" === $"b.int2", "left_anti"),
Row(3) :: Nil)
}
```
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