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https://issues.apache.org/jira/browse/TAJO-1114?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14171749#comment-14171749
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Jihun Kang commented on TAJO-1114:
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It looks very interesting feature. I will start to work on this issue.
> 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: Task
> Reporter: Hyunsik Choi
>
> 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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