Github user gatorsmile commented on a diff in the pull request: https://github.com/apache/spark/pull/19864#discussion_r163347494 --- Diff: sql/core/src/main/scala/org/apache/spark/sql/execution/columnar/InMemoryRelation.scala --- @@ -60,7 +62,8 @@ case class InMemoryRelation( @transient child: SparkPlan, tableName: Option[String])( @transient var _cachedColumnBuffers: RDD[CachedBatch] = null, - val batchStats: LongAccumulator = child.sqlContext.sparkContext.longAccumulator) + val batchStats: LongAccumulator = child.sqlContext.sparkContext.longAccumulator, + statsOfPlanToCache: Statistics = null) --- End diff -- Why we set this to `null`?
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