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Posted to issues@spark.apache.org by "Apache Spark (JIRA)" <ji...@apache.org> on 2015/06/11 01:01:01 UTC
[jira] [Assigned] (SPARK-8300) DataFrame hint for broadcast join
[ https://issues.apache.org/jira/browse/SPARK-8300?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Apache Spark reassigned SPARK-8300:
-----------------------------------
Assignee: Apache Spark
> 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
> Assignee: Apache Spark
>
> 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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