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From "Hyunsik Choi (JIRA)" <j...@apache.org>
Subject [jira] [Work started] (TAJO-236) Implement LogicalPlanVerifier to check if a logical plan is valid
Date Mon, 14 Oct 2013 13:33:42 GMT

     [ https://issues.apache.org/jira/browse/TAJO-236?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Work on TAJO-236 started by Hyunsik Choi.

> Implement LogicalPlanVerifier to check if a logical plan is valid
> -----------------------------------------------------------------
>
>                 Key: TAJO-236
>                 URL: https://issues.apache.org/jira/browse/TAJO-236
>             Project: Tajo
>          Issue Type: Improvement
>          Components: planner/optimizer
>            Reporter: Hyunsik Choi
>            Assignee: Hyunsik Choi
>             Fix For: 0.2-incubating
>
>
> The current Tajo does not have any verification system to check whether a logical plan
is valid, or not. LogicalPlanVerifier will verify the followings of a logical plan:
>  * operand types checking
>  ** some operators have type restrictions. For example, plus(\+)'s operands must be numerical
values.
>  * Table and column existence check. 
>  ** Examples are as follows:
>  *** a create table statement must check if the table already exists
>  *** columns included in select list must exist in corresponding tables.



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