Github user liancheng commented on a diff in the pull request:
https://github.com/apache/spark/pull/3158#discussion_r20082396
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/SpecificMutableRow.scala
---
@@ -169,6 +170,35 @@ final class MutableByte extends MutableValue {
newCopy.asInstanceOf[this.type]
}
}
+final class MutableDate extends MutableValue {
--- End diff --
Yea, just to be clear, you may notice that all those `MutableXxx` classes
are for primitive types. They are used to avoid boxing costs. On the other
hand, `Date` and `Timestamp` objects are always boxed anyway. That's why they
are unnecessary.
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