[jira] [Comment Edited] (DRILL-3517) Add a UDF development FAQ

["Ted Dunning (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/DRILL-3517?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14634309#comment-14634309 ] 

Ted Dunning edited comment on DRILL-3517 at 7/21/15 1:44 AM:
-------------------------------------------------------------

8) My UDF is not a pure function so calling it with the same arguments will result in different values each time.  Drill is only using the result of calling my function once.  How can I fix that?

-     Add the isRandom flag to the annotation that defines your class as a function:

     @FunctionTemplate(isRandom = true, ...)



was (Author: tdunning):

8) My UDF is not a pure function so calling it with the same arguments will result in different values each time.  Drill is only using the result of calling my function once.  How can I fix that?



> Add a UDF development FAQ
> -------------------------
>
>                 Key: DRILL-3517
>                 URL: https://issues.apache.org/jira/browse/DRILL-3517
>             Project: Apache Drill
>          Issue Type: Sub-task
>          Components: Documentation
>            Reporter: Jacques Nadeau
>            Assignee: Bridget Bevens
>
> Lets create a UDF FAQ of common issues, log entries, etc so that people know what to do when they hit certain issues.



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