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From "Carl Steinbach (JIRA)" <>
Subject [jira] [Commented] (HIVE-3072) Hive List Bucketing - DDL support
Date Thu, 23 Aug 2012 20:51:42 GMT


Carl Steinbach commented on HIVE-3072:

@Namit: I'll make another pass through the patch later today. One thing I'd like to request
is that we add an internal configuration property that disables the new DDL by default. We
can remove this once the rest of the DML changes get committed, but in the meantime I don't
think it makes sense to make the DDL visible to users. So to recap, I'm proposing the following:

* Add a configuration property named "hive.internal.ddl.list.bucketing.enable" and set the
default value to false.
* Add a comment in HiveConf explaining that this will be removed once the rest of the DML
changes are committed.
* Do *not* add this property to hive-default.xml.template since we don't want users messing
with it.
* Throw an error if the user tries to use the DDL with hive.internal.ddl.list.bucketing.enable
set to false.

> Hive List Bucketing - DDL support
> ---------------------------------
>                 Key: HIVE-3072
>                 URL:
>             Project: Hive
>          Issue Type: New Feature
>          Components: SQL
>            Reporter: Gang Tim Liu
>            Assignee: Gang Tim Liu
>         Attachments: HIVE-3072.patch, HIVE-3072.patch.1, HIVE-3072.patch.2, HIVE-3072.patch.3,
HIVE-3072.patch.4, HIVE-3072.patch.5
> If a hive table column has skewed keys, query performance on non-skewed key is always
impacted. Hive List Bucketing feature will address it:
> This jira issue will track DDL change for the feature. It's for both single skewed column
and multiple columns.

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