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  1. Calcite
  2. CALCITE-760

Aggregate recommender blows up if row count estimate is too high

        Details

        • Type: Bug
        • Status: Open
        • Priority: Major
        • Resolution: Unresolved
        • Affects Version/s: None
        • Fix Version/s: None
        • Component/s: None
        • Labels:
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          Description

          If you run the aggregate recommendation algorithm with a value of rowCountEstimate that is wrong and large, the algorithm runs for a long time and eventually fails with "OutOfMemoryError: GC overhead limit exceeded".

          I have added LatticeTest.testLatticeWithBadRowCountEstimate as a test case.

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            julianhyde Julian Hyde added a comment - - edited

            Test case and workaround added in http://git-wip-us.apache.org/repos/asf/calcite/commit/e7d15add but issue is not fixed yet.

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            julianhyde Julian Hyde added a comment - - edited Test case and workaround added in http://git-wip-us.apache.org/repos/asf/calcite/commit/e7d15add but issue is not fixed yet.

              People

              • Assignee:
                julianhyde Julian Hyde
                Reporter:
                julianhyde Julian Hyde
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                • Created:
                  Updated:

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