mihaibudiu commented on code in PR #3641:
URL: https://github.com/apache/calcite/pull/3641#discussion_r1482331799
##########
core/src/test/resources/org/apache/calcite/test/SqlToRelConverterTest.xml:
##########
@@ -6343,6 +6343,161 @@ LogicalAggregate(group=[{0}], CNT=[COUNT()])
LogicalFilter(condition=[>(ITEM($0, 'N_NATIONKEY'), 5)])
LogicalProject(**=[$0])
LogicalTableScan(table=[[CATALOG, SALES, NATION]])
+]]>
+ </Resource>
+ </TestCase>
+ <TestCase name="testRemoveDistinctIfUnique">
+ <Resource name="sql">
+ <![CDATA[SELECT
+ deptno,
+ COUNT(DISTINCT sal) as cds,
+ COUNT(sal) as cs,
+ SUM(DISTINCT sal) AS sds,
+ SUM(sal) AS ss
+FROM (
+ SELECT DISTINCT deptno, sal
+ FROM emp)
+GROUP BY deptno]]>
+ </Resource>
+ <Resource name="plan">
+ <![CDATA[
+LogicalProject(DEPTNO=[$0], CDS=[$1], CS=[$2], SDS=[$3], SS=[$3])
+ LogicalAggregate(group=[{0}], CDS=[COUNT($1)], CS=[COUNT()], SDS=[SUM($1)])
+ LogicalAggregate(group=[{0, 1}])
+ LogicalProject(DEPTNO=[$7], SAL=[$5])
+ LogicalTableScan(table=[[CATALOG, SALES, EMP]])
+]]>
+ </Resource>
+ </TestCase>
+ <TestCase name="testRemoveDistinctIfUnique1">
+ <Resource name="sql">
+ <![CDATA[SELECT
+ deptno,
+ COUNT(DISTINCT sal) as cds,
+ COUNT(sal) as cs,
+ SUM(DISTINCT sal) AS sds,
+ SUM(sal) AS ss
+FROM (
+ SELECT DISTINCT deptno, sal
+ FROM emp)
+GROUP BY deptno]]>
+ </Resource>
+ <Resource name="plan">
+ <![CDATA[
+LogicalProject(DEPTNO=[$0], CDS=[$1], CS=[$2], SDS=[$3], SS=[$3])
+ LogicalAggregate(group=[{0}], CDS=[COUNT($1)], CS=[COUNT()], SDS=[SUM($1)])
+ LogicalAggregate(group=[{0, 1}])
+ LogicalProject(DEPTNO=[$7], SAL=[$5])
+ LogicalTableScan(table=[[CATALOG, SALES, EMP]])
+]]>
+ </Resource>
+ </TestCase>
+ <TestCase name="testRemoveDistinctIfUnique2">
+ <Resource name="sql">
+ <![CDATA[SELECT
+ COUNT(DISTINCT sal) as cds,
+ COUNT(sal) as cs,
+ SUM(DISTINCT sal) AS sds,
+ SUM(sal) AS ss
+FROM (
+ SELECT deptno, 1 as sal
+ FROM emp GROUP BY deptno)GROUP BY deptno
+]]>
+ </Resource>
+ <Resource name="plan">
+ <![CDATA[
+LogicalProject(CDS=[$1], CS=[$2], SDS=[$3], SS=[$3])
+ LogicalAggregate(group=[{0}], CDS=[COUNT($1)], CS=[COUNT()], SDS=[SUM($1)])
+ LogicalProject(DEPTNO=[$0], SAL=[1])
+ LogicalAggregate(group=[{0}])
+ LogicalProject(DEPTNO=[$7])
+ LogicalTableScan(table=[[CATALOG, SALES, EMP]])
+]]>
+ </Resource>
+ </TestCase>
+ <TestCase name="testRemoveDistinctIfUnique3">
+ <Resource name="sql">
+ <![CDATA[SELECT
+ COUNT(DISTINCT sal) as cds,
+ COUNT(sal) as cs,
+ SUM(DISTINCT sal) AS sds,
+ SUM(sal) AS ss
+FROM (
+ SELECT DISTINCT deptno, sal
+ FROM emp)
+]]>
+ </Resource>
+ <Resource name="plan">
+ <![CDATA[
+LogicalAggregate(group=[{}], CDS=[COUNT(DISTINCT $0)], CS=[COUNT()],
SDS=[SUM(DISTINCT $0)], SS=[SUM($0)])
+ LogicalProject(SAL=[$1])
+ LogicalAggregate(group=[{0, 1}])
+ LogicalProject(DEPTNO=[$7], SAL=[$5])
+ LogicalTableScan(table=[[CATALOG, SALES, EMP]])
+]]>
+ </Resource>
+ </TestCase>
+ <TestCase name="testRemoveDistinctIfUnique4">
+ <Resource name="sql">
+ <![CDATA[SELECT
+ COUNT(DISTINCT sal) as cds,
+ COUNT(sal) as cs,
+ SUM(DISTINCT sal) AS sds,
+ SUM(sal) AS ss
+FROM (
+ SELECT deptno, sal
+ FROM emp GROUP BY deptno, sal)GROUP BY deptno
+]]>
+ </Resource>
+ <Resource name="plan">
+ <![CDATA[
+LogicalProject(CDS=[$1], CS=[$2], SDS=[$3], SS=[$4])
+ LogicalAggregate(group=[{0}], CDS=[COUNT(DISTINCT $1)], CS=[COUNT()],
SDS=[SUM(DISTINCT $1)], SS=[SUM($1)])
+ LogicalAggregate(group=[{0, 1}])
+ LogicalProject(DEPTNO=[$7], SAL=[$5])
+ LogicalTableScan(table=[[CATALOG, SALES, EMP]])
+]]>
+ </Resource>
+ </TestCase>
+ <TestCase name="testRemoveDistinctIfUnique5">
+ <Resource name="sql">
+ <![CDATA[SELECT COUNT(DISTINCT empno)
+FROM emp
+]]>
+ </Resource>
+ <Resource name="plan">
+ <![CDATA[
+LogicalAggregate(group=[{}], EXPR$0=[COUNT($0)])
Review Comment:
There are so many empno references in the codebase that I couldn't figure
out that this is a primary key.
There are also multiple definitions of this column in multiple files, and I
didn't know which one is being used here.
Can you please add a comment explaining this in the code?
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