Github user Apo1 commented on a diff in the pull request:
https://github.com/apache/spark/pull/10374#discussion_r48231498
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/rows.scala
---
@@ -201,7 +201,7 @@ class GenericRow(protected[sql] val values: Array[Any])
extends Row {
override def toSeq: Seq[Any] = values.toSeq
- override def copy(): Row = this
+ override def copy(): Row = new GenericRow(values.clone())
--- End diff --
I'm not sure what's the best solution. Maybe we need some help from more
experienced committers here. I think we are agreed that we need a change here,
but we differ how the change should look like.
Anyway, it's not urgent, because the wrong behave should only affect very
little developers/users.
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