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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