[jira] [Commented] (HIVE-3072) Hive List Bucketing - DDL support

["Gang Tim Liu (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HIVE-3072?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13292978#comment-13292978 ] 

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

making progress on DML. The following syntax started to work: 
        create table T (c1 string, c2 string) list bucketed by (c1) with skew ('x1');
        create table T (c1 string, c2 string, c3 string) list bucketed by (c1, c2) with skew (('x1', 'x2'), ('y1', 'y2'));

                
> 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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