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From "Ning Zhang (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-2084) Upgrade datanucleus from 2.0.3 to 2.2.3
Date Fri, 01 Apr 2011 16:04:09 GMT

    [ https://issues.apache.org/jira/browse/HIVE-2084?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13014711#comment-13014711
] 

Ning Zhang commented on HIVE-2084:
----------------------------------

Thank Mac for the update. 

@Carl, I'll change the field size if they do not match with the relational schema. BTW, we
don't need to upgrade the relational schema. I'm trying to update the object-to-relational
mapping in package.jdo to match with the relational schema. 

Also there are some tests failing. I'm working on that and will upload a new patch all together.


> Upgrade datanucleus from 2.0.3 to 2.2.3
> ---------------------------------------
>
>                 Key: HIVE-2084
>                 URL: https://issues.apache.org/jira/browse/HIVE-2084
>             Project: Hive
>          Issue Type: Improvement
>            Reporter: Ning Zhang
>            Assignee: Ning Zhang
>         Attachments: HIVE-2084.patch
>
>
> It seems the datanucleus 2.2.3 does a better join in caching. The time it takes to get
the same set of partition objects takes about 1/4 of the time it took for the first time.
While with 2.0.3, it took almost the same amount of time in the second execution. We should
retest the test case mentioned in HIVE-1853, HIVE-1862.

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