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Posted to issues@flink.apache.org by "Chengxiang Li (JIRA)" <ji...@apache.org> on 2015/12/17 03:05:46 UTC

[jira] [Assigned] (FLINK-2871) Add OuterJoin strategy with HashTable on outer side

     [ https://issues.apache.org/jira/browse/FLINK-2871?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Chengxiang Li reassigned FLINK-2871:
------------------------------------

    Assignee: Chengxiang Li

> Add OuterJoin strategy with HashTable on outer side
> ---------------------------------------------------
>
>                 Key: FLINK-2871
>                 URL: https://issues.apache.org/jira/browse/FLINK-2871
>             Project: Flink
>          Issue Type: New Feature
>          Components: Local Runtime, Optimizer
>    Affects Versions: 0.10.0
>            Reporter: Fabian Hueske
>            Assignee: Chengxiang Li
>            Priority: Minor
>
> Outer joins are currently supported with two local execution strategies:
> - sort-merge join
> - hash join where the hash table is built on the inner side. Hence, this strategy is only supported for left and right outer joins.
> In order to support hash-tables on the outer side, we need a special hash table implementation that gives access to all records which have not been accessed during the probe phase.



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