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Posted to dev@drill.apache.org by "Timothy Chen (JIRA)" <ji...@apache.org> on 2014/05/13 00:30:18 UTC

[jira] [Resolved] (DRILL-305) Implement hash join

     [ https://issues.apache.org/jira/browse/DRILL-305?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Timothy Chen resolved DRILL-305.
--------------------------------

    Resolution: Duplicate

> Implement hash join 
> --------------------
>
>                 Key: DRILL-305
>                 URL: https://issues.apache.org/jira/browse/DRILL-305
>             Project: Apache Drill
>          Issue Type: New Feature
>            Reporter: Timothy Chen
>            Assignee: Timothy Chen
>
> To perform better joins against small fact tables (I believe tpch has a case like this) we want to add hash join as another join impl.
> There are a variety of hash join strategies but I plan to start with a basic one where assuming one side fits entirely in memory.
> Part of this is to look for a good off heap hash map impl or potentially write one if none seems fit.



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