[jira] [Commented] (TAJO-458) Visit methods of LogicalPlanVisitor should take a query block as parameter

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

    [ https://issues.apache.org/jira/browse/TAJO-458?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13858073#comment-13858073 ] 

Hyunsik Choi commented on TAJO-458:
-----------------------------------

I just submitted the patch to the reviewboard.
https://reviews.apache.org/r/16495

> Visit methods of LogicalPlanVisitor should take a query block as parameter
> --------------------------------------------------------------------------
>
>                 Key: TAJO-458
>                 URL: https://issues.apache.org/jira/browse/TAJO-458
>             Project: Tajo
>          Issue Type: Improvement
>          Components: planner/optimizer
>            Reporter: Hyunsik Choi
>            Assignee: Hyunsik Choi
>             Fix For: 0.8-incubating
>
>
> A logical plan is composed of multiple query blocks. Each logical node must belong to one query block. A query block instance  provides lots of information. So, it is essential information in many rewrite rules and optimizer implementations. 
> However, so far, individual rewrite rule or optimizer implementation have dealt with query block directly. It may be error-prone and cause duplicated codes. This patch refactors each visitor method of LogicalPlanVisitor to take a query block as a parameter.  
> I'm expecting that this change will provide more convenience for rewrite rules and optimization development.



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