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https://issues.apache.org/jira/browse/PHOENIX-4639?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Clive Stellings updated PHOENIX-4639:
-------------------------------------
    Description: When attempting to use a UDF the code for evaluate never runs 
if the parameter for the UDF is null.  I wrote a function called isnull that 
and am attempting to emulate the same function as in Mysql but when I enter 
null e.g. isnull(null) it returns with an empty value and when I check if the 
eva;iate method actually runs, it never enters the method.  (was: When 
attempting to use a UDF the code for execute never runs if the parameter for 
the UDF is null.  I wrote a function called isnull that and am attempting to 
emulate the same function as in Mysql but when I enter null e.g. isnull(null) 
it returns with an empty value and when I check if the execute method actually 
runs, it never enters the method.)

> Udf's don't run execute method when using null as a parameter.
> --------------------------------------------------------------
>
>                 Key: PHOENIX-4639
>                 URL: https://issues.apache.org/jira/browse/PHOENIX-4639
>             Project: Phoenix
>          Issue Type: Bug
>    Affects Versions: 4.13.2-cdh5.11.2
>         Environment: Centos 7  using Cloudera
>            Reporter: Clive Stellings
>            Priority: Major
>         Attachments: IsNull.java
>
>
> When attempting to use a UDF the code for evaluate never runs if the 
> parameter for the UDF is null.  I wrote a function called isnull that and am 
> attempting to emulate the same function as in Mysql but when I enter null 
> e.g. isnull(null) it returns with an empty value and when I check if the 
> eva;iate method actually runs, it never enters the method.



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