maropu commented on a change in pull request #27077: [SPARK-30408][SQL] Should
not remove orderBy in sortBy clause in Optimizer
URL: https://github.com/apache/spark/pull/27077#discussion_r364100529
##########
File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/Optimizer.scala
##########
@@ -980,15 +980,25 @@ object EliminateSorts extends Rule[LogicalPlan] {
if (newOrders.isEmpty) child else s.copy(order = newOrders)
case Sort(orders, true, child) if
SortOrder.orderingSatisfies(child.outputOrdering, orders) =>
child
- case s @ Sort(_, _, child) => s.copy(child = recursiveRemoveSort(child))
+ case s @ Sort(_, _, child) => s.copy(child = recursiveRemoveSort(s, child))
case j @ Join(originLeft, originRight, _, cond, _) if
cond.forall(_.deterministic) =>
j.copy(left = recursiveRemoveSort(originLeft), right =
recursiveRemoveSort(originRight))
case g @ Aggregate(_, aggs, originChild) if isOrderIrrelevantAggs(aggs) =>
g.copy(child = recursiveRemoveSort(originChild))
}
+ private def recursiveRemoveSort(parent: Sort, plan: LogicalPlan):
LogicalPlan = plan match {
+ case s @ Sort(_, _, child) =>
+ if (parent.global == s.global) {
+ recursiveRemoveSort(child)
+ } else {
+ s.copy(child = recursiveRemoveSort(child))
+ }
+ case _ => recursiveRemoveSort(plan)
+ }
+
private def recursiveRemoveSort(plan: LogicalPlan): LogicalPlan = plan match
{
- case Sort(_, _, child) => recursiveRemoveSort(child)
+ case s @ Sort(_, _, child) => recursiveRemoveSort(s, child)
Review comment:
How about the case , `global sort => project/filter => local sort`?
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