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Posted to issues@tajo.apache.org by "Hyunsik Choi (JIRA)" <ji...@apache.org> on 2016/04/23 11:40:12 UTC

[jira] [Updated] (TAJO-2136) (Umbrella) Optimizer should transform plans instead of modifying them.

     [ https://issues.apache.org/jira/browse/TAJO-2136?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Hyunsik Choi updated TAJO-2136:
-------------------------------
    Summary: (Umbrella) Optimizer should transform plans instead of modifying them.  (was: (Umbrella) Optimizer transforms plans instead of modifying them.)

> (Umbrella) Optimizer should transform plans instead of modifying them.
> ----------------------------------------------------------------------
>
>                 Key: TAJO-2136
>                 URL: https://issues.apache.org/jira/browse/TAJO-2136
>             Project: Tajo
>          Issue Type: Improvement
>          Components: Planner/Optimizer
>            Reporter: Hyunsik Choi
>
> Many bugs and inconsistent meta data of the Plan and MasterPlan representation are being caused by modification. We need to refactor the optimizer and rules to transform immutable data representation instead of modifying them.



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