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From "Jae Young Lee (JIRA)" <j...@apache.org>
Subject [jira] [Created] (TAJO-386) Implement logarithm
Date Thu, 05 Dec 2013 14:52:37 GMT
Jae Young Lee created TAJO-386:
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             Summary: Implement logarithm 
                 Key: TAJO-386
                 URL: https://issues.apache.org/jira/browse/TAJO-386
             Project: Tajo
          Issue Type: Sub-task
            Reporter: Jae Young Lee
            Assignee: Jae Young Lee
            Priority: Minor


- Implement 4 logarithm functions below: 

ln(x) - Returns the natural logarithm of x
log([b], x) - Returns the logarithm of x with base b
log10(x) - Returns the logarithm of x with base 10
log2(x) - Returns the logarithm of x with base 2



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