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https://issues.apache.org/jira/browse/TAJO-70?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13683719#comment-13683719
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Hyunsik Choi commented on TAJO-70:
----------------------------------

I've posted the patch to reviewboard.
https://reviews.apache.org/r/11876/

That patch does as follows:
 * Add DropTableStmt class
 * Add parseDropTableStmt method to QueryAnalyzer
 * Move some codes that handle DDL statements to GlobalEngine
 * Clean up executeQuery and updateQuery methods
                
> Refactor GlobalEngine to handle DDL statements
> ----------------------------------------------
>
>                 Key: TAJO-70
>                 URL: https://issues.apache.org/jira/browse/TAJO-70
>             Project: Tajo
>          Issue Type: Improvement
>          Components: master
>            Reporter: Hyunsik Choi
>            Assignee: Hyunsik Choi
>            Priority: Minor
>             Fix For: 0.2-incubating
>
>
> In the current implementation, the codes to handle DDL statements like CREATE 
> TABLE and DROP TABLE are distributed across ClientServiceHandler and 
> GlobalEngine. This patch will move the codes to GlobalEngine and clean up 
> them.

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