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Posted to issues@calcite.apache.org by "ASF GitHub Bot (Jira)" <ji...@apache.org> on 2019/12/31 20:24:00 UTC

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

     [ https://issues.apache.org/jira/browse/CALCITE-3656?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

ASF GitHub Bot updated CALCITE-3656:
------------------------------------
    Labels: pull-request-available  (was: )

> 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
>            Priority: Major
>              Labels: pull-request-available
>             Fix For: 1.22.0
>
>
> 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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