wuchong commented on a change in pull request #11674:
[FLINK-16887][table-planner-blink] Refactor retraction rules to support
inferring ChangelogMode
URL: https://github.com/apache/flink/pull/11674#discussion_r407329570
##########
File path:
flink-table/flink-table-planner-blink/src/test/resources/org/apache/flink/table/planner/plan/rules/physical/stream/RetractionRulesWithTwoStageAggTest.xml
##########
@@ -39,19 +39,19 @@ LogicalAggregate(group=[{0}], frequency=[COUNT($0)])
</Resource>
<Resource name="planAfter">
<![CDATA[
-GlobalGroupAggregate(groupBy=[cnt], select=[cnt, COUNT_RETRACT(count$0) AS
frequency], updateAsRetraction=[false], accMode=[Acc])
-+- Exchange(distribution=[hash[cnt]], updateAsRetraction=[true], accMode=[Acc])
- +- LocalGroupAggregate(groupBy=[cnt], select=[cnt, COUNT_RETRACT(cnt) AS
count$0, COUNT_RETRACT(*) AS count1$1], updateAsRetraction=[true],
accMode=[Acc])
- +- Union(all=[true], union=[cnt], updateAsRetraction=[true],
accMode=[AccRetract])
- :- Calc(select=[CAST(cnt) AS cnt], updateAsRetraction=[true],
accMode=[AccRetract])
- : +- GlobalGroupAggregate(groupBy=[word], select=[word,
COUNT(count$0) AS cnt], updateAsRetraction=[true], accMode=[AccRetract])
- : +- Exchange(distribution=[hash[word]],
updateAsRetraction=[true], accMode=[Acc])
- : +- LocalGroupAggregate(groupBy=[word], select=[word,
COUNT(number) AS count$0], updateAsRetraction=[true], accMode=[Acc])
- : +- MiniBatchAssigner(interval=[1000ms], mode=[ProcTime],
updateAsRetraction=[true], accMode=[Acc])
- : +- TableSourceScan(table=[[default_catalog,
default_database, MyTable, source: [TestTableSource(word, number)]]],
fields=[word, number], updateAsRetraction=[true], accMode=[Acc])
- +- Calc(select=[cnt], updateAsRetraction=[true], accMode=[Acc])
- +- MiniBatchAssigner(interval=[1000ms], mode=[ProcTime],
updateAsRetraction=[true], accMode=[Acc])
- +- TableSourceScan(table=[[default_catalog, default_database,
MyTable2, source: [TestTableSource(word, cnt)]]], fields=[word, cnt],
updateAsRetraction=[true], accMode=[Acc])
+GlobalGroupAggregate(groupBy=[cnt], select=[cnt, COUNT_RETRACT(count$0) AS
frequency], changelogMode=[I,UA,D])
++- Exchange(distribution=[hash[cnt]], changelogMode=[I])
+ +- LocalGroupAggregate(groupBy=[cnt], select=[cnt, COUNT_RETRACT(cnt) AS
count$0, COUNT_RETRACT(*) AS count1$1], changelogMode=[I])
Review comment:
It is as expected. LocalAggregate will emit accumulators to global
aggregates. All the accumulators are encoded in insert messages.
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