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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLINK-5256) Extend DataSetSingleRowJoin to support Left and Right joins
Date Fri, 12 May 2017 12:18:04 GMT

    [ https://issues.apache.org/jira/browse/FLINK-5256?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16008035#comment-16008035
] 

ASF GitHub Bot commented on FLINK-5256:
---------------------------------------

Github user DmytroShkvyra commented on the issue:

    https://github.com/apache/flink/pull/3673
  
    Thanks a lot Fabian! 


> Extend DataSetSingleRowJoin to support Left and Right joins
> -----------------------------------------------------------
>
>                 Key: FLINK-5256
>                 URL: https://issues.apache.org/jira/browse/FLINK-5256
>             Project: Flink
>          Issue Type: Improvement
>          Components: Table API & SQL
>    Affects Versions: 1.2.0
>            Reporter: Fabian Hueske
>            Assignee: Dmytro Shkvyra
>
> The {{DataSetSingleRowJoin}} is a broadcast-map join that supports arbitrary inner joins
where one input is a single row.
> I found that Calcite translates certain subqueries into non-equi left and right joins
with single input. These cases can be handled if the  {{DataSetSingleRowJoin}} is extended
to support outer joins on the non-single-row input, i.e., left joins if the right side is
single input and vice versa.



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