hvanhovell commented on a change in pull request #25569: [SPARK-28863]
Introduce AlreadyPlanned, a node that speeds-up planning
URL: https://github.com/apache/spark/pull/25569#discussion_r317306217
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File path:
sql/core/src/main/scala/org/apache/spark/sql/execution/SparkStrategies.scala
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@@ -632,6 +632,7 @@ abstract class SparkStrategies extends
QueryPlanner[SparkPlan] {
object BasicOperators extends Strategy {
def apply(plan: LogicalPlan): Seq[SparkPlan] = plan match {
+ case AlreadyPlanned(physical, output) => AlreadyPlannedExec(physical,
output) :: Nil
Review comment:
Maybe I am not following completely, but what happens if you return the
physical plan here? Or do you get into trouble with rules that are not exactly
idempotent?
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