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Date: Tue, 16 Nov 2010 19:55:14 -0500 (EST)
From: "Namit Jain (JIRA)" <jira@apache.org>
To: hive-dev@hadoop.apache.org
Subject: [jira] Commented: (HIVE-1642) Convert join queries to map-join
 based on size of table/row
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    [ https://issues.apache.org/jira/browse/HIVE-1642?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12932741#action_12932741 ] 

Namit Jain commented on HIVE-1642:
----------------------------------

ConditionalResolverCommonJoin

    // generate file size to alias mapping; but connot set file size as key,
    // using 2 list to keep mapping

spelling (connot)

> Convert join queries to map-join based on size of table/row
> -----------------------------------------------------------
>
>                 Key: HIVE-1642
>                 URL: https://issues.apache.org/jira/browse/HIVE-1642
>             Project: Hive
>          Issue Type: Improvement
>          Components: Query Processor
>            Reporter: Namit Jain
>            Assignee: Liyin Tang
>             Fix For: 0.7.0
>
>         Attachments: hive-1642_5.patch, hive-1642_6.patch, hive_1642_1.patch, hive_1642_2.patch, hive_1642_4.patch
>
>
> Based on the number of rows and size of each table, Hive should automatically be able to convert a join into map-join.

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