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From "Navis (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-4209) Cache evaluation result of deterministic expression and reuse it
Date Thu, 02 May 2013 01:19:13 GMT

    [ https://issues.apache.org/jira/browse/HIVE-4209?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13647155#comment-13647155
] 

Navis commented on HIVE-4209:
-----------------------------

[~namit] Running test, my notebook has shutdown twice by overheat. Recent cool patches seemed
added some hot tests. Might take some more time.
                
> Cache evaluation result of deterministic expression and reuse it
> ----------------------------------------------------------------
>
>                 Key: HIVE-4209
>                 URL: https://issues.apache.org/jira/browse/HIVE-4209
>             Project: Hive
>          Issue Type: Improvement
>          Components: Query Processor
>            Reporter: Navis
>            Assignee: Navis
>            Priority: Minor
>         Attachments: HIVE-4209.6.patch.txt, HIVE-4209.D9585.1.patch, HIVE-4209.D9585.2.patch,
HIVE-4209.D9585.3.patch, HIVE-4209.D9585.4.patch, HIVE-4209.D9585.5.patch
>
>
> For example, 
> {noformat}
> select key from src where key + 1 > 100 AND key + 1 < 200 limit 3;
> {noformat}
> key + 1 need not to be evaluated twice.

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