Github user gatorsmile commented on the pull request:
https://github.com/apache/spark/pull/11106#issuecomment-181150882
@marmbrus @rxin I want to get your opinions first before adding the
corresponding Dataframe and Dataset APIs.
Now, `unionall` is changed to `union`, whose default behavior is `UNION
ALL`. The default behavior of `intersect` is `INTERSECT DISTINCT`. I think we
are facing three options:
- Add a new API named `intersectall`
- Add an optional boolean parameter `distinct` into the existing
`intersect` API, like the APIs `sample` and `repartition`
- Do not add any API.
Thank you!
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