[jira] [Created] (CALCITE-777) IS NOT NULL filter is incorrectly dropped for aggregates and window functions

["Aman Sinha (JIRA)" <ji...@apache.org>]

Aman Sinha created CALCITE-777:
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             Summary: IS NOT NULL filter is incorrectly dropped for aggregates and window functions
                 Key: CALCITE-777
                 URL: https://issues.apache.org/jira/browse/CALCITE-777
             Project: Calcite
          Issue Type: Bug
    Affects Versions: 1.3.0-incubating
            Reporter: Aman Sinha
            Assignee: Julian Hyde


The below plans show the IS NOT NULL filter is incorrectly dropped.  

{code}
select wsum from (select sum(sal) over (partition by deptno) as wsum from emp) where wsum is not null;

LogicalProject(WSUM=[$0])
  LogicalProject(WSUM=[SUM($5) OVER (PARTITION BY $7 RANGE BETWEEN UNBOUNDED PRECEDING AND UNBOUNDED FOLLOWING)])
    LogicalTableScan(table=[[CATALOG, SALES, EMP]])
{code}

{code}
select wsum from (select sum(sal) as wsum from emp group by deptno) where wsum is not null;

LogicalProject(WSUM=[$0])
  LogicalProject(WSUM=[$1])
    LogicalAggregate(group=[{0}], WSUM=[SUM($1)])
      LogicalProject(DEPTNO=[$7], SAL=[$5])
        LogicalTableScan(table=[[CATALOG, SALES, EMP]])
{code}



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