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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 Tue, 17 Jan 2017 08:05:27 GMT

    [ https://issues.apache.org/jira/browse/FLINK-5256?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15825615#comment-15825615
] 

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

Github user ex00 commented on the issue:

    https://github.com/apache/flink/pull/3033
  
    Hi @fhueske. I updated PR. Please look my changes. Thanks!


> 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: Anton Mushin
>
> 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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