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https://issues.apache.org/jira/browse/TAJO-1114?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14186255#comment-14186255
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Jihun Kang commented on TAJO-1114:
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I also found some compilation errors when using hamcrest-core library. It may
comes with JDK6 compiler limitation, and I added some workarounds on my test
case. Can I re-open the pull request on this jira issue? I have tested on JDK
1.6.0_45 and 1.7.0_67.
* https://code.google.com/p/hamcrest/issues/detail?id=100#c16
> 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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