Hyunsik Choi created TAJO-1241:
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             Summary: Change default client and table time zone behavior
                 Key: TAJO-1241
                 URL: https://issues.apache.org/jira/browse/TAJO-1241
             Project: Tajo
          Issue Type: Improvement
          Components: storage
            Reporter: Hyunsik Choi
            Assignee: Hyunsik Choi
             Fix For: 0.9.1


By default, TajoClient uses GMT as client time zone unless session variable 
{{TIMEZONE}} is specified. Also, by default Table uses GMT as table time zone 
unless table property {{timezone}} is specified.

This patch changes these default behavior as follows:
 * TajoClient will use {{TimeZone.getDefault()}} by default.
 * Table implicitly uses tajo.timezone by default.
    * In other words, this default time zone does not affect the table property 
in catalog.

I also added the documentation about time zone.
http://people.apache.org/~hyunsik/timezone/time_zone.html



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