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From "Gang Tim Liu (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-3072) Hive List Bucketing - DDL support
Date Mon, 13 Aug 2012 17:24:38 GMT

    [ https://issues.apache.org/jira/browse/HIVE-3072?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13433328#comment-13433328
] 

Gang Tim Liu commented on HIVE-3072:
------------------------------------

There are a few reasons to release a DDL as a patch:
1. the content is getting bigger. might be better to get it review so that we can capture
issues earlier.
2. the skewed grammar will not only benefit list bucketing feature but also other feature
like skewed join. releasing grammar patch will unblock others' development.
                
> Hive List Bucketing - DDL support
> ---------------------------------
>
>                 Key: HIVE-3072
>                 URL: https://issues.apache.org/jira/browse/HIVE-3072
>             Project: Hive
>          Issue Type: New Feature
>          Components: SQL
>            Reporter: Gang Tim Liu
>            Assignee: Gang Tim Liu
>
> If a hive table column has skewed keys, query performance on non-skewed key is always
impacted. Hive List Bucketing feature will address it:
> https://cwiki.apache.org/Hive/listbucketing.html
> This jira issue will track DDL change for the feature. It's for both single skewed column
and multiple columns.

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