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From "Shuxiong Ye (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (PHOENIX-2019) Implement Build-in math function ln and log
Date Mon, 01 Jun 2015 15:29:19 GMT

     [ https://issues.apache.org/jira/browse/PHOENIX-2019?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Shuxiong Ye updated PHOENIX-2019:
---------------------------------
    Attachment: 0001-PHOENIX-2019-Implement-Build-in-math-function-ln-and.patch

> Implement Build-in math function ln and log
> -------------------------------------------
>
>                 Key: PHOENIX-2019
>                 URL: https://issues.apache.org/jira/browse/PHOENIX-2019
>             Project: Phoenix
>          Issue Type: Sub-task
>            Reporter: Shuxiong Ye
>            Assignee: Shuxiong Ye
>         Attachments: 0001-PHOENIX-2019-Implement-Build-in-math-function-ln-and.patch
>
>
> Implement math build-in function, ln and log. Example show as below:
> ln(dp)	natural logarithm	ln(2.0)	0.693147180559945
> log(dp)	base 10 logarithm	log(100.0)	2
> log(b, x)	numeric logarithm to base b	log(2.0, 64.0)	6.0000000000



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