[jira] [Resolved] (TAJO-1114) Improve ConfVars (SessionVar) to take a validator interface to check its input.

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

     [ https://issues.apache.org/jira/browse/TAJO-1114?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Hyunsik Choi resolved TAJO-1114.
--------------------------------
    Resolution: Fixed

committed it to master branch. Thanks for the quick fix!

> Improve ConfVars (SessionVar) to take a validator interface to check its input.
> -------------------------------------------------------------------------------
>
>                 Key: TAJO-1114
>                 URL: https://issues.apache.org/jira/browse/TAJO-1114
>             Project: Tajo
>          Issue Type: Improvement
>            Reporter: Hyunsik Choi
>            Assignee: Jihun Kang
>             Fix For: 0.9.1
>
>
> Each task uses session variables from client or configs from tajo-site.xml. The session variables and configs are used in task during query processing.
> If invalid configs or invalid session variables are used for a query, the error will be caused in a runtime instead of query init phase. It's bad situation. Invalid values must be detected at the initialization phase.
>  Because each session variable or config varies in its value type and value range, It would be great if each ConfigKey takes a validator for its value and Tajo uses validators for it.



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