Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/6869#discussion_r32718273
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/SpecificMutableRow.scala
---
@@ -191,7 +192,7 @@ final class MutableAny extends MutableValue {
* based on the dataTypes of each column. The intent is to decrease
garbage when modifying the
* values of primitive columns.
*/
-final class SpecificMutableRow(val values: Array[MutableValue]) extends
MutableRow {
+final class SpecificMutableRow(val values: Array[MutableValue]) extends
Row with MutableRow {
--- End diff --
why not `extends InternalRow with MutableRow`?
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