Github user viirya commented on a diff in the pull request:
https://github.com/apache/spark/pull/17770#discussion_r117404393
--- Diff: sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala ---
@@ -187,6 +187,9 @@ class Dataset[T] private[sql](
}
}
+ // Wrap analyzed logical plan with an analysis barrier so we won't
traverse/resolve it again.
+ @transient private val planWithBarrier: LogicalPlan =
AnalysisBarrier(logicalPlan)
--- End diff --
`CacheManager` uses `Dataset.logicalPlan` as key to look up identical plans
already cached. If we always wrap `logicalPlan` with a barrier, we need to
strip it when looking up caches.
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