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Posted to dev@hive.apache.org by "Rui Li (JIRA)" <ji...@apache.org> on 2014/12/10 09:18:12 UTC

[jira] [Updated] (HIVE-8913) Make SparkMapJoinResolver handle runtime skew join [Spark Branch]

     [ https://issues.apache.org/jira/browse/HIVE-8913?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Rui Li updated HIVE-8913:
-------------------------
    Attachment: HIVE-8913.1-spark.patch

The patch only supports runtime skew join for simple queries where join is the leave work.

> Make SparkMapJoinResolver handle runtime skew join [Spark Branch]
> -----------------------------------------------------------------
>
>                 Key: HIVE-8913
>                 URL: https://issues.apache.org/jira/browse/HIVE-8913
>             Project: Hive
>          Issue Type: Improvement
>          Components: Spark
>            Reporter: Rui Li
>            Assignee: Rui Li
>         Attachments: HIVE-8913.1-spark.patch
>
>
> Sub-task of HIVE-8406.
> Now we have {{SparkMapJoinResolver}} in place. But at the moment, it doesn't handle the map join task created by upstream SkewJoinResolver, i.e. those wrapped in a ConditionalTask. We have to implement this part for runtime skew join to work on spark. To do so, we can borrow logic from {{MapJoinResolver}}.



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