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From "Namit Jain (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HIVE-933) Infer bucketing/sorting properties
Date Fri, 18 Dec 2009 00:06:18 GMT

     [ https://issues.apache.org/jira/browse/HIVE-933?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Namit Jain updated HIVE-933:

    Fix Version/s:     (was: 0.5.0)

> Infer bucketing/sorting properties
> ----------------------------------
>                 Key: HIVE-933
>                 URL: https://issues.apache.org/jira/browse/HIVE-933
>             Project: Hadoop Hive
>          Issue Type: New Feature
>          Components: Query Processor
>            Reporter: Namit Jain
> This is a long-term plan, and may require major changes.
> From the query, we can figure out the sorting/bucketing properties, and change the metadata
of the destination at that time.
> However, this means that different partitions may have different metadata. Currently,
the query plan is same for all the 
> partitions of the table - we can do the following:
> 1. In the first cut, have a simple approach where you take the union all metadata, and
create the most defensive plan.
> 2. Enhance mapredWork() to include partition specific operator trees.

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