xuyangzhong commented on code in PR #25826:
URL: https://github.com/apache/flink/pull/25826#discussion_r2131784781
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flink-table/flink-table-planner/src/test/resources/org/apache/flink/table/planner/plan/stream/sql/SetOperatorsTest.xml:
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@@ -231,10 +231,8 @@ LogicalMinus(all=[false])
</Resource>
<Resource name="optimized exec plan">
<![CDATA[
-GroupAggregate(groupBy=[c], select=[c])
-+- Exchange(distribution=[hash[c]])
- +- Calc(select=[c])
- +- TableSourceScan(table=[[default_catalog, default_database, T1]],
fields=[a, b, c])
+Calc(select=[c])
Review Comment:
Is this change due to the introduction of the PruneEmptyRule about GroupAgg?
It seems different from before. If I understand correctly, the previous
GroupAggregate also implied deduplication, right?
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