Github user hvanhovell commented on a diff in the pull request: https://github.com/apache/spark/pull/19864#discussion_r156609277 --- Diff: sql/core/src/main/scala/org/apache/spark/sql/execution/CacheManager.scala --- @@ -80,6 +80,14 @@ class CacheManager extends Logging { cachedData.isEmpty } + private def extractStatsOfPlanForCache(plan: LogicalPlan): Option[Statistics] = { + if (plan.stats.rowCount.isDefined) { --- End diff -- We could also collect the size as part of building the cache.
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