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https://issues.apache.org/jira/browse/PHOENIX-1715?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14359308#comment-14359308
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ASF GitHub Bot commented on PHOENIX-1715:
-----------------------------------------

Github user JamesRTaylor commented on a diff in the pull request:

    https://github.com/apache/phoenix/pull/45#discussion_r26340175
  
    --- Diff: 
phoenix-core/src/main/java/org/apache/phoenix/schema/types/PInteger.java ---
    @@ -272,4 +273,10 @@ public PhoenixArray newArray(PDataType type, Object[] 
elements) {
           };
         }
       }
    +
    --- End diff --
    
    remove


> Implement Build-in math function Sign
> -------------------------------------
>
>                 Key: PHOENIX-1715
>                 URL: https://issues.apache.org/jira/browse/PHOENIX-1715
>             Project: Phoenix
>          Issue Type: Sub-task
>            Reporter: Shuxiong Ye
>            Assignee: Shuxiong Ye
>
> Take a look at the typical math functions that are implemented in relational 
> database systems 
> (http://www.postgresql.org/docs/current/static/functions-math.html) and 
> implement the same for Phoenix in Java following this guide: 
> http://phoenix-hbase.blogspot.com/2013/04/how-to-add-your-own-built-in-function.html



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