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From "Ron Hu (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (SPARK-16026) Cost-based Optimizer framework
Date Tue, 16 Aug 2016 08:28:22 GMT

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

Ron Hu updated SPARK-16026:
---------------------------
    Attachment:     (was: Spark_CBO_Design_Spec_v_1_2.pdf)

> 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
>         Attachments: Spark_CBO_Design_Spec_v_1_2.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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