yjhjstz opened a new pull request, #1914:
URL: https://github.com/apache/cloudberry/pull/1914

   ```sql
   SET optimizer = on;
   SET optimizer_enable_multiple_distinct_aggs = on;
   
   EXPLAIN SELECT a, count(DISTINCT b) AS cnt_b, count(DISTINCT c) AS cnt_c
   FROM mdqa_part WHERE b BETWEEN 0 AND 2 GROUP BY a;
   
   Note: optimizer_enable_multiple_distinct_aggs is off by default; without it 
ORCA falls back before reaching the buggy code path.
   
   Error and stack trace (cassert build)
   
   CPhysicalCTEProducer.cpp:117: Failed assertion: col_ref->GetUsage() != 
CColRef::EUnknown
   Stack trace:
   1    gpos::CException::Raise + 278
   2    gpopt::CPhysicalCTEProducer::PcrsRequired + 380
   3    gpopt::CReqdPropPlan::ComputeReqdCols + 223
   4    gpopt::CReqdPropPlan::Compute + 153
   5    gpopt::CExpressionHandle::ComputeChildReqdProps + 515
   6    gpopt::CJobGroupExpressionOptimization::ComputeCurrentChildRequirements 
+ 423
   7    gpopt::CJobGroupExpressionOptimization::ScheduleChildGroupsJobs + 236
   8    gpopt::CJobGroupExpressionOptimization::EevtOptimizeChildren + 115
   9    gpopt::CJobStateMachine + 376
   10   gpopt::CJobGroupExpressionOptimization::FExecute + 123
   11   gpopt::CScheduler::FExecute + 77
   12   gpopt::CScheduler::ExecuteJobs + 121
   13   gpopt::CScheduler::Run + 46
   14   gpopt::CEngine::Optimize + 919
   15   gpopt::COptimizer::PexprOptimize + 115
   16   gpopt::COptimizer::PdxlnOptimize + 1416
   17   COptTasks::OptimizeTask + 1651
   18   gpos::CTask::Execute + 202
   19   gpos::CWorker::Execute + 197
   20   gpos::CAutoTaskProxy::Execute + 227
   21   gpos_exec + 933
   
   LOG:  GPORCA failed to produce plan (unexpected)
   ```
   On release builds the assertion is compiled out and the same over-declared 
column list crashes later with SIGSEGV in MakeDXLTableDescr during DXL 
translation.
   
   
   Fixes #ISSUE_Number
   
   ### What does this PR do?
   <!-- Brief overview of the changes, including any major features or fixes -->
   
   ### Type of Change
   - [ ] Bug fix (non-breaking change)
   - [ ] New feature (non-breaking change)
   - [ ] Breaking change (fix or feature with breaking changes)
   - [ ] Documentation update
   
   ### Breaking Changes
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   ### Test Plan
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   - [ ] Unit tests added/updated
   - [ ] Integration tests added/updated
   - [ ] Passed `make installcheck`
   - [ ] Passed `make -C src/test installcheck-cbdb-parallel`
   
   ### Impact
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   **Performance:**
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   **User-facing changes:**
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   **Dependencies:**
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   ### Checklist
   - [ ] Followed [contribution 
guide](https://cloudberry.apache.org/contribute/code)
   - [ ] Added/updated documentation
   - [ ] Reviewed code for security implications
   - [ ] This PR contains AI-assisted code generation
   - [ ] Requested review from [cloudberry 
committers](https://github.com/orgs/apache/teams/cloudberry-committers)
   
   ### Additional Context
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