Github user mgaido91 commented on the issue: https://github.com/apache/spark/pull/21403 @maryannxue as I said my initial proposal was like that. I think that this has the advantage of avoiding some code duplication as the same logic which is added in ResolveInValues has to be spread over all the places where a In is build and avoiding to change the In signature, so that if a user is using In directly in his/her code we don't break it. On the other side, I agree with you that the approach having a `Seq[Expression]` is cleaner IMO (that's why it was my original proposal). @cloud-fan @gatorsmile what do you think about this?
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