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From "Namit Jain (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HIVE-1792) track the joins which are being converted to map-join automatically
Date Wed, 24 Nov 2010 07:07:13 GMT

    [ https://issues.apache.org/jira/browse/HIVE-1792?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12935232#action_12935232
] 

Namit Jain commented on HIVE-1792:
----------------------------------

      //set task tag
199	      if(this.taskTag == Task.CONVERTED_LOCAL_MAPJOIN) {
200	        backupTask.setTaskTag(Task.BACKUP_COMMON_JOIN);
201	      }


This should not be added to a task - task does not interpret these tags - it is a black box
for the tasks.

This logic should be present in MapJoinResolver - it can be inferred at compile time

> track the joins which are being converted to map-join automatically
> -------------------------------------------------------------------
>
>                 Key: HIVE-1792
>                 URL: https://issues.apache.org/jira/browse/HIVE-1792
>             Project: Hive
>          Issue Type: New Feature
>          Components: Query Processor
>    Affects Versions: 0.7.0
>            Reporter: Liyin Tang
>            Assignee: Liyin Tang
>             Fix For: 0.7.0
>
>         Attachments: hive-1792-1.patch, hive-1792-2.patch, hive-1792-3.patch
>
>
> We should be able to track how many queries (join) got converted to
> map-join

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