spark-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Reynold Xin (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SPARK-546) Support full outer join and multiple join in a single shuffle
Date Thu, 04 Dec 2014 17:52:12 GMT

    [ https://issues.apache.org/jira/browse/SPARK-546?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14234404#comment-14234404
] 

Reynold Xin commented on SPARK-546:
-----------------------------------

Actually my experience implementing full join in a single shuffle is that it is fairly complicated
and very hard to maintain. Since it is doable entirely in user code and given SparkSQL's SchemaRDD
already supports it, I suggest not pulling this in Spark core. 

> Support full outer join and multiple join in a single shuffle
> -------------------------------------------------------------
>
>                 Key: SPARK-546
>                 URL: https://issues.apache.org/jira/browse/SPARK-546
>             Project: Spark
>          Issue Type: Improvement
>          Components: Spark Core, Streaming
>            Reporter: Reynold Xin
>            Assignee: Aaron Staple
>             Fix For: 1.2.0
>
>
> RDD[(K,V)] now supports left/right outer join but not full outer join.
> Also it'd be nice to provide a way for users to join multiple RDDs on the same key in
a single shuffle.



--
This message was sent by Atlassian JIRA
(v6.3.4#6332)

---------------------------------------------------------------------
To unsubscribe, e-mail: issues-unsubscribe@spark.apache.org
For additional commands, e-mail: issues-help@spark.apache.org


Mime
View raw message