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Posted to issues@spark.apache.org by "Ron Hu (JIRA)" <ji...@apache.org> on 2016/11/01 22:14:58 UTC
[jira] [Issue Comment Deleted] (SPARK-16026) Cost-based Optimizer
framework
[ https://issues.apache.org/jira/browse/SPARK-16026?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Ron Hu updated SPARK-16026:
---------------------------
Comment: was deleted
(was: Design Specification of Spark Cost-Based Optimization is now posted.)
> 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.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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