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Posted to dev@hive.apache.org by "Navis (JIRA)" <ji...@apache.org> on 2014/08/20 07:29:19 UTC

[jira] [Updated] (HIVE-7796) Provide subquery pushdown facility for storage handlers

     [ https://issues.apache.org/jira/browse/HIVE-7796?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Navis updated HIVE-7796:
------------------------

    Status: Patch Available  (was: Open)

> Provide subquery pushdown facility for storage handlers
> -------------------------------------------------------
>
>                 Key: HIVE-7796
>                 URL: https://issues.apache.org/jira/browse/HIVE-7796
>             Project: Hive
>          Issue Type: Improvement
>          Components: StorageHandler
>            Reporter: Navis
>            Assignee: Navis
>            Priority: Minor
>         Attachments: HIVE-7796.1.patch.txt
>
>
> If underlying storage can handle basic filtering or aggregation, hive can delegate execution of whole subquery to the storage and handle it as a simple scanning operation.
> Experimentally implemented on JDBC / Phoenix handler and seemed working good. Hopefully open the code for those too, but it's not allowed to me yet.



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