Github user ioana-delaney commented on a diff in the pull request:
https://github.com/apache/spark/pull/17546#discussion_r110984951
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/CostBasedJoinReorder.scala
---
@@ -54,8 +54,6 @@ case class CostBasedJoinReorder(conf: SQLConf) extends
Rule[LogicalPlan] with Pr
private def reorder(plan: LogicalPlan, output: Seq[Attribute]):
LogicalPlan = {
val (items, conditions) = extractInnerJoins(plan)
- // TODO: Compute the set of star-joins and use them in the join
enumeration
- // algorithm to prune un-optimal plan choices.
--- End diff --
@cloud-fan Thatâs correct. If CBO is enabled, it will do the final
planning.
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