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  1. Calcite
  2. CALCITE-360

Introduce a Rule to infer predicates from equi join conditions.

        Details

        • Type: New Feature
        • Status: Closed
        • Priority: Major
        • Resolution: Fixed
        • Affects Version/s: None
        • Fix Version/s: 0.9.0-incubating
        • Component/s: None
        • Labels:
          None

          Description

          This is along the lines of the TransitivePredicate inference Rule in Hive.
          For e.g. for

          select 1 from sales.emp d inner join sales.emp e 
on d.deptno = e.deptno where e.deptno > 7

          we can infer

          ProjectRel(EXPR$0=[1])
  JoinRel(condition=[=($7, $16)], joinType=[inner])
    FilterRel(condition=[>($7, 7)])
      TableAccessRel(table=[[CATALOG, SALES, EMP]])
    FilterRel(condition=[>($7, 7)])
      TableAccessRel(table=[[CATALOG, SALES, EMP]])

          More egs in the patch. We can do better than Hive: by pulling up Predicates that are effective above every RelNode and inferring new Predicates for the other side of a Join.

          1. Text File
            OPTIQ-360.1.patch
            61 kB
            Harish Butani

            Issue Links

            is duplicated by

            Bug - A problem which impairs or prevents the functions of the product. CALCITE-41 Add rule to propagate constraints onto aliased columns

            • Major - Major loss of function.
            • Closed

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              julianhyde Julian Hyde added a comment -

              Fixed in http://git-wip-us.apache.org/repos/asf/incubator-optiq/commit/c33e602f.

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              julianhyde Julian Hyde added a comment - Fixed in http://git-wip-us.apache.org/repos/asf/incubator-optiq/commit/c33e602f .
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              julianhyde Julian Hyde added a comment -

              Close issues resolved in release 0.9.0-incubating (2014-08-25).

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              julianhyde Julian Hyde added a comment - Close issues resolved in release 0.9.0-incubating (2014-08-25).

                People

                • Assignee:
                  julianhyde Julian Hyde
                  Reporter:
                  rhbutani Harish Butani
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                  Dates

                  • Created:
                    Updated:
                    Resolved:

                    Development