[CALCITE-6332] Optimization CoreRules.AGGREGATE_EXPAND_DISTINCT_AGGREGATES_TO_JOIN produces incorrect results for aggregates with groupSets - ASF JIRA

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Details

Type: Bug
Status: Closed
Priority: Minor
Resolution: Fixed
Affects Version/s: 1.36.0
Fix Version/s: 1.37.0
Component/s: core
Labels:
- pull-request-available

Description

The optimization rule does not seem to consider the groupSets at all.
The following two queries produce the same resulting plan:

select count(distinct deptno) as cd, count(*) as c
from emp
group by cube(deptno)

select count(distinct deptno) as cd, count(*) as c
from emp
group by deptno

(Notice that one query has a cube, while the other one doesn't)
The produced plan is:

    LogicalProject(CD=[$1], C=[$2]), id = 196
      LogicalAggregate(group=[{0}], CD=[COUNT($0)], C=[$SUM0($1)]), id = 201
        LogicalAggregate(group=[{0}], C=[COUNT()]), id = 198
          LogicalProject(DEPTNO=[$8]), id = 192
            LogicalTableScan(table=[[schema, EMP]]), id = 163