wojustme opened a new pull request #2740:
URL: https://github.com/apache/calcite/pull/2740


   Define a rule to pull up constants project under Sort
   Related JIRA: https://issues.apache.org/jira/browse/CALCITE-5035
   
   Just like:
   ```
   ===origin rel tree===
   LogicalSort(sort0=[$2], sort1=[$0], dir0=[ASC], dir1=[ASC])
     LogicalProject(EMPNO=[$0], ENAME=[$1], DEPTNO=[$7])
       LogicalFilter(condition=[=($7, 123)])
         LogicalTableScan(table=[[CATALOG, SALES, EMP]])
   ===optimized rel tree===
   LogicalProject(EMPNO=[$0], ENAME=[$1], DEPTNO=[123])
   |-LogicalSort(sort0=[$0], dir0=[ASC])
     |-LogicalProject(EMPNO=[$0], ENAME=[$1], DEPTNO=[$7])
       |-LogicalFilter(condition=[=($7, 123)])
         |-LogicalTableScan(table=[[CATALOG, SALES, EMP]])
   ```


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