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https://issues.apache.org/jira/browse/SPARK-3864?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Reynold Xin closed SPARK-3864.
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Resolution: Later
Closing this as later.
> Specialize join for tables with unique integer keys
> ---------------------------------------------------
>
> Key: SPARK-3864
> URL: https://issues.apache.org/jira/browse/SPARK-3864
> Project: Spark
> Issue Type: Sub-task
> Components: SQL
> Reporter: Reynold Xin
>
> We can create a new operator that uses an array as the underlying storage to
> avoid hash lookups entirely for dimension tables that have integer keys.
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