[jira] [Resolved] (TAJO-24) Cost-based Optimizer for Tajo

["Hyunsik Choi (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/TAJO-24?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Hyunsik Choi resolved TAJO-24.
------------------------------

       Resolution: Fixed
    Fix Version/s: 0.2-incubating

I'm fixing this issue because we resolved all sub tasks.

> Cost-based Optimizer for Tajo
> -----------------------------
>
>                 Key: TAJO-24
>                 URL: https://issues.apache.org/jira/browse/TAJO-24
>             Project: Tajo
>          Issue Type: New Feature
>          Components: planner/optimizer
>            Reporter: Hyunsik Choi
>            Assignee: Hyunsik Choi
>             Fix For: 0.2-incubating
>
>         Attachments: Cost-based_Optimizer_130401.pdf, Cost-based_Optimizer_130402.pdf
>
>
> The current query optimizer is too simple and is not extensible. In addition, it does not support scalar and table subqueries. 
> So, I would like to propose the implementation of new optimizer which is extensible and is based on some cost model. 
> In my opinion, this work is not trivial and will take a very long time. Also, we will have many discussions on this issue. This is the first draft, and I would like to continue to improve the requirements and details.



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