danny0405 commented on a change in pull request #11340: [Flink 14338] Upgrade
Calcite version to 1.22 for Flink SQL
URL: https://github.com/apache/flink/pull/11340#discussion_r394771769
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File path:
flink-table/flink-table-planner-blink/src/main/scala/org/apache/flink/table/planner/plan/rules/logical/WindowAggregateReduceFunctionsRule.scala
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@@ -39,14 +40,26 @@ import scala.collection.JavaConversions._
class WindowAggregateReduceFunctionsRule
extends AggregateReduceFunctionsRule(
operand(classOf[LogicalWindowAggregate], any()),
- RelFactories.LOGICAL_BUILDER) {
+ RelBuilder.proto(
+ Contexts.of(
+ RelFactories.DEFAULT_STRUCT,
+ RelBuilder.Config.DEFAULT
+ .withPruneInputOfAggregate(false)))) {
override def newAggregateRel(
relBuilder: RelBuilder,
oldAgg: Aggregate,
newCalls: util.List[AggregateCall]): Unit = {
// create a LogicalAggregate with simpler aggregation functions
+
+ // Because of:
+ // [CALCITE-3763] RelBuilder.aggregate should prune unused fields from the
input,
+ // if the input is a Project.
+ //
+ // the field can not be pruned if it is referenced by other expressions
+ // of the window aggregation(i.e. the TUMBLE_START/END).
+ // To solve this, we config the RelBuilder to forbidden this feature.
Review comment:
The comment makes the change more clear, so i choose to keep them.
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