You are viewing a plain text version of this content. The canonical link for it is here.

Posted to dev@hive.apache.org by "Szehon Ho (JIRA)" <ji...@apache.org> on 2014/11/19 08:37:34 UTC

[jira] [Updated] (HIVE-8911) Enable mapjoin hints [Spark Branch]

     [ https://issues.apache.org/jira/browse/HIVE-8911?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Szehon Ho updated HIVE-8911:
----------------------------
    Summary: Enable mapjoin hints [Spark Branch]  (was: Enable mapjoin hints)

> Enable mapjoin hints [Spark Branch]
> -----------------------------------
>
>                 Key: HIVE-8911
>                 URL: https://issues.apache.org/jira/browse/HIVE-8911
>             Project: Hive
>          Issue Type: Sub-task
>          Components: Spark
>    Affects Versions: spark-branch
>            Reporter: Szehon Ho
>
> Currently the big table selection in a mapjoin is based on stats.
> We should also enable the big-table selection based on hints.  See class MapJoinProcessor.  This is a logical-optimizer class, so we should be able to re-use this without too many changes to hook up with SparkMapJoinResolver.



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