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Posted to issues@calcite.apache.org by "Julian Hyde (JIRA)" <ji...@apache.org> on 2015/06/16 22:45:00 UTC

[jira] [Created] (CALCITE-760) Aggregate recommender blows up if row count estimate is too high

Julian Hyde created CALCITE-760:
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             Summary: Aggregate recommender blows up if row count estimate is too high
                 Key: CALCITE-760
                 URL: https://issues.apache.org/jira/browse/CALCITE-760
             Project: Calcite
          Issue Type: Bug
            Reporter: Julian Hyde
            Assignee: Julian Hyde


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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