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From "Reynold Xin (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (SPARK-8300) DataFrame hint for broadcast join
Date Wed, 10 Jun 2015 22:59:00 GMT

     [ https://issues.apache.org/jira/browse/SPARK-8300?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Reynold Xin updated SPARK-8300:
-------------------------------
    Summary: DataFrame hint for broadcast join  (was: Hint for broadcast join)

> DataFrame hint for broadcast join
> ---------------------------------
>
>                 Key: SPARK-8300
>                 URL: https://issues.apache.org/jira/browse/SPARK-8300
>             Project: Spark
>          Issue Type: Sub-task
>          Components: SQL
>            Reporter: Reynold Xin
>
> It is not always possible to have perfect cardinality estimation. We should allow users
to give hint to the optimizer to do broadcast join.



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