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Posted to issues@flink.apache.org by "Jark Wu (Jira)" <ji...@apache.org> on 2020/09/10 04:05:00 UTC

[jira] [Assigned] (FLINK-19175) Tests in JoinITCase do not test BroadcastHashJoin

     [ https://issues.apache.org/jira/browse/FLINK-19175?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jark Wu reassigned FLINK-19175:
-------------------------------

    Assignee: Danny Chen

> Tests in JoinITCase do not test BroadcastHashJoin
> -------------------------------------------------
>
>                 Key: FLINK-19175
>                 URL: https://issues.apache.org/jira/browse/FLINK-19175
>             Project: Flink
>          Issue Type: Bug
>          Components: Table SQL / Planner, Tests
>            Reporter: Dawid Wysakowicz
>            Assignee: Danny Chen
>            Priority: Major
>
> The tests in JoinITCase claim to test the {{BroadcastHashJoin}}, but they actually do not. None of the tables used in the tests have proper statistics therefore, none of the tables meet the threshold for the broadcast join. At the same time the {{ShuffleHashJoin}} is not disabled, therefore they silently fallback to {{ShuffleHashJoin}}.
> In summary none (or at least not all of the tests) are executed for BroadcastHashJoin, but are executed twice for ShuffleHashJoin.



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