Github user hvanhovell commented on a diff in the pull request: https://github.com/apache/spark/pull/13758#discussion_r67745192 --- Diff: sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/util/GenericArrayData.scala --- @@ -142,3 +164,415 @@ class GenericArrayData(val array: Array[Any]) extends ArrayData { result } } + +final class GenericIntArrayData(private val primitiveArray: Array[Int]) --- End diff -- I think the class hierarchy is a bit off. We should make `GenericArrayData` abstract and introduce a `GenericeRefArrayData` as a replacement for the current `GenericArrayData`. The downside of the introducing this many `ArrayData` classes is that `ArrayData` operations will be mega-morphic.
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