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https://issues.apache.org/jira/browse/FLINK-2106?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14622248#comment-14622248
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Fabian Hueske commented on FLINK-2106:
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Having a working outer join algorithm (FLINK-2105 or FLINK-2107) is a
prerequisite for this issue.
I would strongly recommend to first solve FLINK-2105 before tackling this issue.
> Add outer joins to API, Optimizer, and Runtime
> ----------------------------------------------
>
> Key: FLINK-2106
> URL: https://issues.apache.org/jira/browse/FLINK-2106
> Project: Flink
> Issue Type: Sub-task
> Components: Java API, Local Runtime, Optimizer, Scala API
> Reporter: Fabian Hueske
> Priority: Minor
> Fix For: pre-apache
>
>
> Add left/right/full outer join methods to the DataSet APIs (Java, Scala), to
> the optimizer, and the runtime of Flink.
> Initially, the execution strategy should be a sort-merge outer join
> (FLINK-2105) but can later be extended to hash joins for left/right outer
> joins.
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