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https://issues.apache.org/jira/browse/HIVE-9156?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14265670#comment-14265670
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Brock Noland commented on HIVE-9156:
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Linked to HIVE-9259
> Investigate CBO [Spark Branch]
> ------------------------------
>
> Key: HIVE-9156
> URL: https://issues.apache.org/jira/browse/HIVE-9156
> Project: Hive
> Issue Type: Sub-task
> Components: Spark
> Affects Versions: spark-branch
> Reporter: Brock Noland
>
> We need to get a list of the following:
> * What happens when you enable the CBO with HOS
> * What portions of the CBO integration are tez or MR specific
> * Some basic idea of what our cost model will look like
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