Uploaded image for project: 'Calcite'
  1. Calcite
  2. CALCITE-727

Constant folding involving CASE and NULL

    Details

    • Type: Bug
    • Status: Closed
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: 1.4.0-incubating
    • Component/s: None
    • Labels:
      None

      Description

      There are a few Hive issues relating to constant reduction of NULL and CASE. Calcite should do the same.

      HIVE-9645:

      select count(1) from store_sales where null=1;
      # should simplify to
      select count(1) from store_sales where false;
      

      HIVE-9644:

      select count(1) from store_sales where (case ss_sold_date when '1998-01-01' then 1 else null end)=1;
      # should simplify to
      select count(1) from store_sales where ss_sold_date= '1998-01-01' ;
      

        Attachments

          Issue Links

            Activity

              People

              • Assignee:
                julianhyde Julian Hyde
                Reporter:
                julianhyde Julian Hyde
              • Votes:
                0 Vote for this issue
                Watchers:
                2 Start watching this issue

                Dates

                • Created:
                  Updated:
                  Resolved: