devozerov commented on a change in pull request #2437:
URL: https://github.com/apache/calcite/pull/2437#discussion_r652093414
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File path: core/src/test/resources/org/apache/calcite/test/RelOptRulesTest.xml
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@@ -1028,6 +1028,39 @@ LogicalProject(MGR=[$0], SUM_SAL=[$2])
LogicalAggregate(group=[{0, 1}], SUM_SAL=[SUM($2)])
LogicalProject(MGR=[$3], DEPTNO=[$7], SAL=[$5])
LogicalTableScan(table=[[CATALOG, SALES, EMP]])
+]]>
+ </Resource>
+ </TestCase>
+ <TestCase name="testAggregateUnionTransposeWithOneUniqueInput">
+ <Resource name="sql">
+ <![CDATA[select deptno, SUM(t) from (
+select deptno, 1 as t from sales.emp e1
+union all
+select distinct deptno, 2 as t from sales.emp e2)
+group by deptno]]>
+ </Resource>
+ <Resource name="planBefore">
+ <![CDATA[
+LogicalAggregate(group=[{0}], EXPR$1=[SUM($1)])
+ LogicalUnion(all=[true])
+ LogicalProject(DEPTNO=[$7], T=[1])
+ LogicalTableScan(table=[[CATALOG, SALES, EMP]])
+ LogicalAggregate(group=[{0, 1}])
+ LogicalProject(DEPTNO=[$7], T=[2])
+ LogicalTableScan(table=[[CATALOG, SALES, EMP]])
+]]>
+ </Resource>
+ <Resource name="planAfter">
+ <![CDATA[
+LogicalAggregate(group=[{0}], EXPR$1=[SUM($1)])
Review comment:
We do the opposite - return if all inputs are already unique. Otherwise
- do a pushdown. Please see the previous comment for more details.
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