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[SPARK-32360][SQL] Add MaxMinBy to support eliminate sorts #29142

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ulysses-you wants to merge 4 commits into from
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[SPARK-32360][SQL] Add MaxMinBy to support eliminate sorts #29142

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e544ca3
init
ulysses-you Jul 17, 2020
bc454b6
fix
ulysses-you Jul 18, 2020
8aee8a5
add ut
ulysses-you Jul 20, 2020
cd93b70
fix
ulysses-you Jul 20, 2020
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2 changes: 1 addition & 1 deletion sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/Optimizer.scala
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Expand Up @@ -1004,7 +1004,7 @@ object EliminateSorts extends Rule[LogicalPlan] {

private def isOrderIrrelevantAggs(aggs: Seq[NamedExpression]): Boolean = {
def isOrderIrrelevantAggFunction(func: AggregateFunction): Boolean = func match {
case _: Min | _: Max | _: Count => true
case _: Min | _: Max | _: Count | _: MaxMinBy => true
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@maropu maropu Jul 20, 2020

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Adding this itself looks fine to me.

// Arithmetic operations for floating-point values are order-sensitive
// (they are not associative).
case _: Sum | _: Average | _: CentralMomentAgg =>
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