[jira] Updated: (HIVE-69) genMapRedTasks does not use the tree walker and uses implicit state which makes it difficult to enhance

["Carl Steinbach (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HIVE-69?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Carl Steinbach updated HIVE-69:
-------------------------------

    Fix Version/s: 0.3.0

> genMapRedTasks does not use the tree walker and uses implicit state which makes it difficult to enhance
> -------------------------------------------------------------------------------------------------------
>
>                 Key: HIVE-69
>                 URL: https://issues.apache.org/jira/browse/HIVE-69
>             Project: Hadoop Hive
>          Issue Type: Bug
>          Components: Query Processor
>            Reporter: Namit Jain
>            Assignee: Namit Jain
>             Fix For: 0.3.0
>
>         Attachments: patch.txt
>
>
> In SemanticAnalyzer, genmapredtasks() does not use a tree walker. For map-side joins, the taskplan needs to be enhanced to be possibly
> broken at MapSink also. Basically, the code is very difficult to enhance since there are implicit assumptions that reduce sink is the only
> operator where the plan breaks.
> This should be enhanced so that the user can implement their own task generation logic which is independent of the tree walking.

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