Github user sameeragarwal commented on the pull request:
https://github.com/apache/spark/pull/10626#issuecomment-169935761
@gatorsmile I pulled your changes and verified that the new intersect
implementation fails even when there is a deterministic sampling operator in
the plan, i.e., something along the lines of the following will now fail:
```scala
val data = sparkContext.parallelize(1 to 600, 1).toDF("id")
assert(data.sample(false, 0.1, 1).intersect(data.sample(false, 0.1,
1)).collect().isEmpty) //FAILS
```
If that's intentional, please let me know if you'd like me to fix the test
or fold the above change as part of your PR. Thanks!
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