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  1. Calcite
  2. CALCITE-368

Add SemiJoinRule, planner rule to convert project-join-aggregate into semi-join

        Details

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

          Description

          Semi-join is an important logical relational expression but many query sources (e.g. SqlToRelTranslator) do not generate them. This rule would create SemiJoinRel if it sees a join that aggregates its right input on the join key; a project on top is necessary to be sure that columns from the right side of the join are not being used.

          Also, add class JoinInfo and a method on JoinRelBase 'public JoinInfo analyzeCondition()', to make it easier to analyze whether join conditions are equi-joins.

            Issue Links

            relates to

            Bug - A problem which impairs or prevents the functions of the product. CALCITE-328 Introduce semi-join-like flag in JoinRelBase

            • Major - Major loss of function.
            • Open

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              julianhyde Julian Hyde added a comment -

              Fixed in http://git-wip-us.apache.org/repos/asf/incubator-optiq/commit/5d209a50.

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              julianhyde Julian Hyde added a comment - Fixed in http://git-wip-us.apache.org/repos/asf/incubator-optiq/commit/5d209a50 .
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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:
                  julianhyde Julian Hyde
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                  • Created:
                    Updated:
                    Resolved:

                    Development