cloud-fan commented on a change in pull request #24626: [SPARK-27747][SQL] add
a logical plan link in the physical plan
URL: https://github.com/apache/spark/pull/24626#discussion_r285090139
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File path:
sql/core/src/main/scala/org/apache/spark/sql/execution/SparkStrategies.scala
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@@ -63,6 +63,17 @@ case class PlanLater(plan: LogicalPlan) extends
LeafExecNode {
abstract class SparkStrategies extends QueryPlanner[SparkPlan] {
self: SparkPlanner =>
+ override def plan(plan: LogicalPlan): Iterator[SparkPlan] = {
+ super.plan(plan).map { p =>
+ val logicalPlan = plan match {
+ case ReturnAnswer(rootPlan) => rootPlan
+ case _ => plan
+ }
+ p.tags += QueryPlan.LOGICAL_PLAN_TAG_NAME -> logicalPlan
Review comment:
This pattern is called stackable traits in Scala. When `super.plan` is
called, its recursive `plan` call points to this overridden version.
You can also see from the tests that, not only the root node has the logical
plan link.
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