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https://issues.apache.org/jira/browse/FLINK-2106?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14654445#comment-14654445
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Fabian Hueske commented on FLINK-2106:
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Hi [~jkovacs] and [~r-pogalz],
As I said before, this issue will touch quite a few aspects of the system. It
would be good to try to solve it with multiple smaller, self-contained PRs
instead of one big PR which is harder to review. I think a good start would be
to implement an {{OuterJoinDriver}}. Most of the code can be copied from the
{{MatchDriver}} but the strategies need to be adapted. That could be a first PR.
Please don't hesitate to get in touch if you have questions or need any other
help with 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
> Assignee: Ricky Pogalz
> 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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