[
https://issues.apache.org/jira/browse/TAJO-256?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14368629#comment-14368629
]
Fengdong Yu commented on TAJO-256:
----------------------------------
+1
cost based query estimate is important, Hive is also working on it.
see here:
http://www.hortonworks.com/blog/hive-0-14-cost-based-optimizer-cbo-technical-overview/
> Support data cube (Umbrella)
> ----------------------------
>
> Key: TAJO-256
> URL: https://issues.apache.org/jira/browse/TAJO-256
> Project: Tajo
> Issue Type: New Feature
> Components: catalog, distributed query plan, parser
> Reporter: Jihoon Son
> Assignee: Jihoon Son
>
> This issue includes follows sub issues
> * SQL support of group by extensions (GROUPING SETS, CUBE, ROLLUP)
> * Query execution of group by extensions
> * GROUPING() function
> * Data cube materialization process
> * Cube schema maintenance
> * Sample-based cost estimation
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
