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https://issues.apache.org/jira/browse/CALCITE-6864?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Zhen Chen updated CALCITE-6864:
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Summary: ProjectAggregateMergeRule lose the alias of the top Project (was:
ProjectAggregateMergeRule will lose the alias of the top Project)
> ProjectAggregateMergeRule lose the alias of the top Project
> -----------------------------------------------------------
>
> Key: CALCITE-6864
> URL: https://issues.apache.org/jira/browse/CALCITE-6864
> Project: Calcite
> Issue Type: Bug
> Components: core
> Affects Versions: 1.39.0
> Reporter: Zhen Chen
> Assignee: Zhen Chen
> Priority: Major
> Fix For: 1.39.0
>
>
> SQL
> {code:java}
> select deptno + ss
> from (
> select job, deptno, min(sal) as ms, sum(sal) as ss
> from sales.emp
> group by job, deptno {code}
> planBefore
> {code:java}
> LogicalProject(EXPR$0=[+($1, $3)])
> LogicalAggregate(group=[{0, 1}], MS=[MIN($2)], SS=[SUM($2)])
> LogicalProject(JOB=[$2], DEPTNO=[$7], SAL=[$5])
> LogicalTableScan(table=[[CATALOG, SALES, EMP]]) {code}
> planAfter（old）
> {code:java}
> LogicalProject($f0=[+($1, $2)])
> LogicalAggregate(group=[{0, 1}], SS=[SUM($2)])
> LogicalProject(JOB=[$2], DEPTNO=[$7], SAL=[$5])
> LogicalTableScan(table=[[CATALOG, SALES, EMP]]) {code}
> We should get like this
> {code:java}
> LogicalProject(EXPR$0=[+($1, $2)])
> LogicalAggregate(group=[{0, 1}], SS=[SUM($2)])
> LogicalProject(JOB=[$2], DEPTNO=[$7], SAL=[$5])
> LogicalTableScan(table=[[CATALOG, SALES, EMP]]) {code}
> We should keep the alias EXPR$0.
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