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  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' ;

            Issue Links

            is related to

            Bug - A problem which impairs or prevents the functions of the product. HIVE-9645 Constant folding case NULL equality

            • Major - Major loss of function.
            • Closed
            relates to

            Bug - A problem which impairs or prevents the functions of the product. HIVE-9644 Fold case & when udfs

            • Major - Major loss of function.
            • Closed

              Activity

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              julianhyde Julian Hyde added a comment -

              Fixed in http://git-wip-us.apache.org/repos/asf/incubator-calcite/commit/21cf1259.

              Ashutosh Chauhan, FYI.

              Show
              julianhyde Julian Hyde added a comment - Fixed in http://git-wip-us.apache.org/repos/asf/incubator-calcite/commit/21cf1259 . Ashutosh Chauhan , FYI.
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              jnadeau Jacques Nadeau added a comment -

              Resolved in release 1.4.0-incubating (2015-08-23)

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              jnadeau Jacques Nadeau added a comment - Resolved in release 1.4.0-incubating (2015-08-23)

                People

                • Assignee:
                  julianhyde Julian Hyde
                  Reporter:
                  julianhyde Julian Hyde
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                  Dates

                  • Created:
                    Updated:
                    Resolved:

                    Development