[ 
https://issues.apache.org/jira/browse/SPARK-16026?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15712012#comment-15712012
 ] 

Zhenhua Wang commented on SPARK-16026:
--------------------------------------

[~rxin] Yes, I'll spend more time on CBO from this saturday.

> Cost-based Optimizer framework
> ------------------------------
>
>                 Key: SPARK-16026
>                 URL: https://issues.apache.org/jira/browse/SPARK-16026
>             Project: Spark
>          Issue Type: New Feature
>          Components: SQL
>            Reporter: Reynold Xin
>              Labels: releasenotes
>         Attachments: Spark_CBO_Design_Spec.pdf
>
>
> This is an umbrella ticket to implement a cost-based optimizer framework 
> beyond broadcast join selection. This framework can be used to implement some 
> useful optimizations such as join reordering.
> The design should discuss how to break the work down into multiple, smaller 
> logical units. For example, changes to statistics class, system catalog, cost 
> estimation/propagation in expressions, cost estimation/propagation in 
> operators can be done in decoupled pull requests.



--
This message was sent by Atlassian JIRA
(v6.3.4#6332)

---------------------------------------------------------------------
To unsubscribe, e-mail: issues-unsubscr...@spark.apache.org
For additional commands, e-mail: issues-h...@spark.apache.org

Reply via email to