wangyum commented on a change in pull request #32475:
URL: https://github.com/apache/spark/pull/32475#discussion_r633270247
##########
File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/LimitPushDownThroughWindow.scala
##########
@@ -42,17 +42,19 @@ object LimitPushDownThroughWindow extends Rule[LogicalPlan]
{
_.containsAllPatterns(WINDOW, LIMIT), ruleId) {
// Adding an extra Limit below WINDOW when the partitionSpec of all window
functions is empty.
case LocalLimit(limitExpr @ IntegerLiteral(limit),
- window @ Window(windowExpressions, Nil, orderSpec, child))
+ window @ Window(windowExpressions, partitionSpec, orderSpec, child))
Review comment:
Nit: indentation.
##########
File path:
sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/optimizer/LimitPushdownThroughWindowSuite.scala
##########
@@ -155,36 +155,164 @@ class LimitPushdownThroughWindowSuite extends PlanTest {
WithoutOptimize.execute(correctAnswer.analyze))
}
- test("Should not push down if partitionSpec is not empty") {
+ test("Should not push down when child's maxRows smaller than limit value") {
Review comment:
Can we do not move the order? To reduce the change.
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