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https://issues.apache.org/jira/browse/PHOENIX-1687?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14373096#comment-14373096
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Naveen Madhire commented on PHOENIX-1687:
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[~simararneja] I also had the same issue but I used getValue() function to get
the value from the expression. I am working on strings so after fetching the
value from getValue(), I did string cast to covert to strings. Your's may be a
different scenario but you can give it a try.
> Implement missing math built-in POWER function
> ----------------------------------------------
>
> Key: PHOENIX-1687
> URL: https://issues.apache.org/jira/browse/PHOENIX-1687
> Project: Phoenix
> Issue Type: Sub-task
> Reporter: Aakarsh Agarwal
> Assignee: Aakarsh Agarwal
> Labels: gsoc2015, java
>
> 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
> For this specific task, it is meant to implement missing funstion POWER for
> Phoenix in Java.
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