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https://issues.apache.org/jira/browse/HIVE-3072?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14049667#comment-14049667
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Lefty Leverenz commented on HIVE-3072:
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This is documented in the wiki here:
* [Language Manual -- DDL -- Skewed Tables |
https://cwiki.apache.org/confluence/display/Hive/LanguageManual+DDL#LanguageManualDDL-SkewedTables]
> 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
> Fix For: 0.10.0
>
> Attachments: HIVE-3072.patch, HIVE-3072.patch.1, HIVE-3072.patch.2,
> HIVE-3072.patch.3, HIVE-3072.patch.4, HIVE-3072.patch.5, HIVE-3072.patch.6,
> HIVE-3072.patch.7
>
>
> 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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