JingsongLi commented on a change in pull request #9322: [FLINK-13471][table]
Add FlatAggregate support to stream Table API(blink planner)
URL: https://github.com/apache/flink/pull/9322#discussion_r310175904
##########
File path:
flink-table/flink-table-planner-blink/src/main/scala/org/apache/flink/table/planner/plan/metadata/FlinkRelMdModifiedMonotonicity.scala
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@@ -279,6 +292,27 @@ class FlinkRelMdModifiedMonotonicity private extends
MetadataHandler[ModifiedMon
rel: StreamExecOverAggregate,
mq: RelMetadataQuery): RelModifiedMonotonicity =
constants(rel.getRowType.getFieldCount)
+ def getRelModifiedMonotonicityOnTableAggregate(
+ input: RelNode,
+ grouping: Array[Int],
+ rowSize: Int,
+ mq: RelMetadataQuery): RelModifiedMonotonicity = {
+
+ val fmq = FlinkRelMetadataQuery.reuseOrCreate(mq)
+ val inputMonotonicity = fmq.getRelModifiedMonotonicity(input)
+
+ // if group by an update field or group by a field mono is null, just
return null
+ if (grouping.exists(e =>
Review comment:
Ignore me, there is no method to judge grouping only.
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