[jira] [Reopened] (SPARK-16026) Cost-based Optimizer Framework

["Xiao Li (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SPARK-16026?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Xiao Li reopened SPARK-16026:
-----------------------------

> 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
>            Assignee: Zhenhua Wang
>            Priority: Major
>              Labels: releasenotes
>             Fix For: 2.3.0
>
>         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.



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