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Posted to issues@flink.apache.org by "Jark Wu (Jira)" <ji...@apache.org> on 2022/07/22 02:53:00 UTC

[jira] [Assigned] (FLINK-26929) Introduce adaptive hash join for batch sql optimization

     [ https://issues.apache.org/jira/browse/FLINK-26929?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jark Wu reassigned FLINK-26929:
-------------------------------

    Assignee: dalongliu

> Introduce adaptive hash join for batch sql optimization
> -------------------------------------------------------
>
>                 Key: FLINK-26929
>                 URL: https://issues.apache.org/jira/browse/FLINK-26929
>             Project: Flink
>          Issue Type: New Feature
>          Components: Table SQL / Runtime
>            Reporter: dalongliu
>            Assignee: dalongliu
>            Priority: Major
>             Fix For: 1.16.0
>
>
> We propose an optimization method adaptive hash join for the batch join scenario, hoping to integrate the advantages of sorted-merge join and hash join according to the characteristics of runtime data. The adaptive hash join will try to use hash join strategy firstly, if it failed, will fall back to sort merge join.



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