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Posted to dev@hive.apache.org by "Laljo John Pullokkaran (JIRA)" <ji...@apache.org> on 2014/04/16 02:16:20 UTC

[jira] [Commented] (HIVE-5775) Introduce Cost Based Optimizer to Hive

    [ https://issues.apache.org/jira/browse/HIVE-5775?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13970241#comment-13970241 ] 

Laljo John Pullokkaran commented on HIVE-5775:
----------------------------------------------

First rev of CBO.

This is a limited version that does not support:
1. Outer Joins
2. Union
3. All of the UDFs
4. Doesn't play all permutations of joins



> Introduce Cost Based Optimizer to Hive
> --------------------------------------
>
>                 Key: HIVE-5775
>                 URL: https://issues.apache.org/jira/browse/HIVE-5775
>             Project: Hive
>          Issue Type: New Feature
>            Reporter: Laljo John Pullokkaran
>            Assignee: Laljo John Pullokkaran
>         Attachments: CBO-2.pdf, HIVE-5775.1.patch
>
>




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