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Posted to issues@tajo.apache.org by "Hyunsik Choi (JIRA)" <ji...@apache.org> on 2015/10/15 06:49:05 UTC

[jira] [Updated] (TAJO-386) Implement logarithm

     [ https://issues.apache.org/jira/browse/TAJO-386?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Hyunsik Choi updated TAJO-386:
------------------------------
    Issue Type: New Feature  (was: Sub-task)
        Parent:     (was: TAJO-362)

> Implement logarithm 
> --------------------
>
>                 Key: TAJO-386
>                 URL: https://issues.apache.org/jira/browse/TAJO-386
>             Project: Tajo
>          Issue Type: New Feature
>          Components: Function/UDF
>            Reporter: Jae Young Lee
>            Priority: Minor
>              Labels: newbie
>         Attachments: TAJO-386.patch
>
>
> - 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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