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From "Edward Capriolo (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HIVE-1511) Hive plan serialization is slow
Date Wed, 04 Aug 2010 18:25:17 GMT

    [ https://issues.apache.org/jira/browse/HIVE-1511?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12895352#action_12895352
] 

Edward Capriolo commented on HIVE-1511:
---------------------------------------

Also possibly a clever way to remove duplicate expressions that evaluate to the same result
such as multiple key=0

> Hive plan serialization is slow
> -------------------------------
>
>                 Key: HIVE-1511
>                 URL: https://issues.apache.org/jira/browse/HIVE-1511
>             Project: Hadoop Hive
>          Issue Type: Improvement
>    Affects Versions: 0.7.0
>            Reporter: Ning Zhang
>
> As reported by Edward Capriolo:
> For reference I did this as a test case....
> SELECT * FROM src where
> key=0 OR key=0 OR key=0 OR  key=0 OR key=0 OR key=0 OR key=0 OR key=0
> OR key=0 OR key=0 OR key=0 OR
> key=0 OR key=0 OR key=0 OR  key=0 OR key=0 OR key=0 OR key=0 OR key=0
> OR key=0 OR key=0 OR key=0 OR
> ...(100 more of these)
> No OOM but I gave up after the test case did not go anywhere for about
> 2 minutes.

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