[GitHub] [calcite] Aitozi opened a new pull request, #3035: [CALCITE-5466] Fix the constant condition can't be reduced after corr…

Wed, 18 Jan 2023 23:08:57 -0800 


Aitozi opened a new pull request, #3035:
URL: https://github.com/apache/calcite/pull/3035

   …elate
   
   Before fix the sql in test will be optimize to:
   
   ```
   LogicalProject(ENAME=[$0], EMPNO=[$1], EMPNO_R=[$3], TYPE=[CASE(=($2, 
'bounded'), 1, 2)])
     LogicalCorrelate(correlation=[$cor0], joinType=[inner], 
requiredColumns=[{1}])
       LogicalProject(ENAME=[$1], EMPNO=[$0], __SOURCE__TYPE__=['bounded'])
         LogicalTableScan(table=[[CATALOG, SALES, EMP]])
       LogicalTableFunctionScan(invocation=[RAMP($cor0.EMPNO)], 
rowType=[RecordType(INTEGER I)])
   ```
   
   Now, the constant condition can be reduced:
   
   ```
   LogicalProject(ENAME=[$0], EMPNO=[$1], EMPNO_R=[$3], TYPE=[1])
     LogicalCorrelate(correlation=[$cor0], joinType=[inner], 
requiredColumns=[{1}])
       LogicalProject(ENAME=[$1], EMPNO=[$0], __SOURCE__TYPE__=['bounded'])
         LogicalTableScan(table=[[CATALOG, SALES, EMP]])
       LogicalTableFunctionScan(invocation=[RAMP($cor0.EMPNO)], 
rowType=[RecordType(INTEGER I)])
   ```


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