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Posted to dev@calcite.apache.org by "Vladimir Sitnikov (Jira)" <ji...@apache.org> on 2019/12/31 13:43:00 UTC

[jira] [Created] (CALCITE-3656) EnumerableNestedLoopJoin cost should account for cost of inner restarts

Vladimir Sitnikov created CALCITE-3656:
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             Summary: EnumerableNestedLoopJoin cost should account for cost of inner restarts
                 Key: CALCITE-3656
                 URL: https://issues.apache.org/jira/browse/CALCITE-3656
             Project: Calcite
          Issue Type: Bug
          Components: core
    Affects Versions: 1.21.0
            Reporter: Vladimir Sitnikov
            Assignee: Vladimir Sitnikov


EnumerableNestedLoopJoin uses makeCost(rowCount, 0, 0) which does not account the efforts spent in restarting the nested loops.

For instance: select * from emp, dept where false produces 0 rows, however, it still has non-trivial execution efforts.



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