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https://issues.apache.org/jira/browse/DRILL-5666?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Arina Ielchiieva updated DRILL-5666:
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Fix Version/s: (was: 1.12.0)
Future
> Add information about UDF naming collision to Drill documentation
> -----------------------------------------------------------------
>
> Key: DRILL-5666
> URL: https://issues.apache.org/jira/browse/DRILL-5666
> Project: Apache Drill
> Issue Type: Task
> Affects Versions: 1.10.0
> Reporter: Arina Ielchiieva
> Assignee: Bridget Bevens
> Priority: Minor
> Labels: doc-impacting
> Fix For: Future
>
>
> Add information about UDF naming collision to Drill documentation.
> The below information can be used as model:
> Under duplicated UDF we imply UDF with the same signature (name + input
> parameters, including input mode, ex: LOWER(VARCHAR-OPTIONAL)).
> If duplicated function is found during drillbit start up, drillbit will fail.
> If we speak about Dynamic UDFs upload then if user tries to register
> duplicated function, registration will fail and user will see appropriate
> error message.
> This error message will include duplicated function signature and from where
> it was registered (built-in or jar name if dynamic).
> Functions can be built-in or dynamic. When function is built-in, it can be
> registered from two places, from drill-java-exec jar or from custom jar (if
> it is placed into the classpath, usually into jars folder).
> If function is built-in and was registered from drill-java-exec jar, you
> cannot replace it with your own, unless you change drill-java-exec jar (this
> will mean you'll have your own Drill version).
> If function is built-in and was registered from custom jar in classpath, you
> can remove / replace custom jar and restart drillbit.
> If function is dynamic, you can use DROP FUNCTION command and then register
> new function with the same signature.
> Link to Drill documentation -
> https://drill.apache.org/docs/develop-custom-functions/
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