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Posted to dev@hive.apache.org by "Chao (JIRA)" <ji...@apache.org> on 2014/12/20 01:15:14 UTC

[jira] [Commented] (HIVE-8640) Support hints of SMBJoin [Spark Branch]

    [ https://issues.apache.org/jira/browse/HIVE-8640?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14254333#comment-14254333 ] 

Chao commented on HIVE-8640:
----------------------------

For {{window.q.q}} I filed HIVE-9104. The test is failing, but don't know since when.

> Support hints of SMBJoin [Spark Branch]
> ---------------------------------------
>
>                 Key: HIVE-8640
>                 URL: https://issues.apache.org/jira/browse/HIVE-8640
>             Project: Hive
>          Issue Type: Sub-task
>          Components: Spark
>    Affects Versions: spark-branch
>            Reporter: Szehon Ho
>            Assignee: Szehon Ho
>         Attachments: HIVE-8640.1-spark.patch
>
>
> HIVE-8202 supports conversion of join to SMB Join automatically, which relies on the configuration property: "hive.auto.convert.sortmerge.join.bigtable.selection.policy".  
> This task is to support conversion based on map-hints, instead of this policy.  As hints are deprecated, this would not be the primary policy in line with MapReduce, but can be available as a backup to achieve feature parity.



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