dylanhz commented on code in PR #27319:
URL: https://github.com/apache/flink/pull/27319#discussion_r2591177874
##########
flink-table/flink-table-planner/src/test/resources/org/apache/flink/table/planner/plan/batch/sql/agg/AggregateReduceGroupingTest.xml:
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@@ -381,7 +381,7 @@ LogicalProject(a4=[$0], b4=[$1], EXPR$2=[$3])
</Resource>
<Resource name="optimized exec plan">
<![CDATA[
-HashWindowAggregate(groupBy=[a4], auxGrouping=[b4],
window=[TumblingGroupWindow('w$, d4, 900000)], select=[a4, b4 AS EXPR$2,
COUNT(c4) AS EXPR$2])
+HashWindowAggregate(groupBy=[a4], auxGrouping=[b4],
window=[TumblingGroupWindow('w$, d4, 900000)], select=[a4, b4, COUNT(c4) AS
EXPR$2])
Review Comment:
AFAIK, we don't currently have automated validation for plans, but this
feature looks quite valuable, though the implementation might be challenging.
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