Github user CodingCat commented on a diff in the pull request:
https://github.com/apache/spark/pull/20368#discussion_r163402210
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/columnar/InMemoryRelation.scala
---
@@ -63,7 +63,7 @@ case class InMemoryRelation(
tableName: Option[String])(
@transient var _cachedColumnBuffers: RDD[CachedBatch] = null,
val batchStats: LongAccumulator =
child.sqlContext.sparkContext.longAccumulator,
- statsOfPlanToCache: Statistics = null)
+ statsOfPlanToCache: Statistics)
--- End diff --
leave no default value is fine, we do not any default value actually
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