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From "Lefty Leverenz (JIRA)" <j...@apache.org>
Subject [jira] [Comment Edited] (HIVE-10403) Add n-way join support for Hybrid Grace Hash Join
Date Sat, 02 May 2015 04:38:08 GMT

    [ https://issues.apache.org/jira/browse/HIVE-10403?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14524556#comment-14524556
] 

Lefty Leverenz edited comment on HIVE-10403 at 5/2/15 4:37 AM:
---------------------------------------------------------------

Doc note:  This adds two configuration parameters (*hive.mapjoin.hybridgrace.minwbsize* and
*hive.mapjoin.hybridgrace.minnumpartitions*) to HiveConf.java, so they need to be documented
in the wiki.

* [Configuration Properties -- Query and DDL Execution | https://cwiki.apache.org/confluence/display/Hive/Configuration+Properties#ConfigurationProperties-QueryandDDLExecution]
* [Hybrid Hybrid Grace Hash Join, v1.0 | https://cwiki.apache.org/confluence/display/Hive/Hybrid+Hybrid+Grace+Hash+Join%2C+v1.0]

Also add the parameters to the cross-reference list in the Tez configs section (same as for
HIVE-9277 parameters):

* [Configuration Properties -- Tez | https://cwiki.apache.org/confluence/display/Hive/Configuration+Properties#ConfigurationProperties-Tez]


was (Author: lefty@hortonworks.com):
Doc note:  This adds two configuration parameters (*hive.mapjoin.hybridgrace.minwbsize* and
*hive.mapjoin.hybridgrace.minnumpartitions*) to HiveConf.java, so they need to be documented
in the wiki.

* [Configuration Properties -- Query and DDL Execution | https://cwiki.apache.org/confluence/display/Hive/Configuration+Properties#ConfigurationProperties-QueryandDDLExecution]

> Add n-way join support for Hybrid Grace Hash Join
> -------------------------------------------------
>
>                 Key: HIVE-10403
>                 URL: https://issues.apache.org/jira/browse/HIVE-10403
>             Project: Hive
>          Issue Type: Improvement
>    Affects Versions: 1.2.0
>            Reporter: Wei Zheng
>            Assignee: Wei Zheng
>              Labels: TODOC1.2
>             Fix For: 1.2.0, 1.3.0
>
>         Attachments: HIVE-10403.01.patch, HIVE-10403.02.patch, HIVE-10403.03.patch, HIVE-10403.04.patch,
HIVE-10403.06.patch, HIVE-10403.07.patch, HIVE-10403.08.patch
>
>
> Currently Hybrid Grace Hash Join only supports 2-way join (one big table and one small
table). This task will enable n-way join (one big table and multiple small tables).



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