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Posted to dev@hive.apache.org by "Siying Dong (JIRA)" <ji...@apache.org> on 2011/08/17 21:45:27 UTC

[jira] [Commented] (HIVE-2385) Local Mode can be more aggressive if LIMIT optimization is on

    [ https://issues.apache.org/jira/browse/HIVE-2385?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13086539#comment-13086539 ] 

Siying Dong commented on HIVE-2385:
-----------------------------------

I don't know why but I can't create review board using this patch.

> Local Mode can be more aggressive if LIMIT optimization is on
> -------------------------------------------------------------
>
>                 Key: HIVE-2385
>                 URL: https://issues.apache.org/jira/browse/HIVE-2385
>             Project: Hive
>          Issue Type: Improvement
>            Reporter: Siying Dong
>            Assignee: Siying Dong
>            Priority: Minor
>         Attachments: HIVE-2385.1.patch
>
>
> Local mode now depends on total input data, but for LIMIT queries with no filtering, the data actually scanned can be much less and it's relatively predictable. We can place local mode more aggressively.

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