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From "Zoltan Haindrich (Jira)" <j...@apache.org>
Subject [jira] [Updated] (HIVE-24357) Exchange SWO table/algorithm strategy
Date Wed, 04 Nov 2020 23:00:00 GMT

     [ https://issues.apache.org/jira/browse/HIVE-24357?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Zoltan Haindrich updated HIVE-24357:
------------------------------------
    Attachment: swo.before.jointree.dot.png

> Exchange SWO table/algorithm strategy
> -------------------------------------
>
>                 Key: HIVE-24357
>                 URL: https://issues.apache.org/jira/browse/HIVE-24357
>             Project: Hive
>          Issue Type: Improvement
>            Reporter: Zoltan Haindrich
>            Assignee: Zoltan Haindrich
>            Priority: Major
>         Attachments: swo.before.jointree.dot.png
>
>
> SWO right now runs like: 
> {code}
> for every strategy s: for every table t: try s for t
> {code}
> this results in that an earlier startegy may create a more entangled operator tree behind
- in case its able to merge for a less prioritized table
> it would probably make more sense to do:
> {code}
> for every table t: for every strategy s: try s for t
> {code}



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