leanken commented on a change in pull request #29547:
URL: https://github.com/apache/spark/pull/29547#discussion_r477143319
##########
File path:
sql/core/src/main/scala/org/apache/spark/sql/execution/joins/HashedRelation.scala
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@@ -1066,10 +1074,9 @@ private[joins] object LongHashedRelation {
/**
* Common trait with dummy implementation for NAAJ special HashedRelation
- * EmptyHashedRelation
* HashedRelationWithAllNullKeys
*/
-trait NullAwareHashedRelation extends HashedRelation with Externalizable {
+trait NullAwareHashedRelation extends HashedRelation {
Review comment:
OK, consider it has no other extension in future NAAJ scenario, it is
reasonable to just delete it.
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