[jira] [Assigned] (METRON-1135) Make Stellar field transformations handle nulls properly

["Casey Stella (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/METRON-1135?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Casey Stella reassigned METRON-1135:
------------------------------------

    Assignee: Casey Stella

> Make Stellar field transformations handle nulls properly
> --------------------------------------------------------
>
>                 Key: METRON-1135
>                 URL: https://issues.apache.org/jira/browse/METRON-1135
>             Project: Metron
>          Issue Type: Bug
>            Reporter: Casey Stella
>            Assignee: Casey Stella
>
> As it stands, stellar field transformations disallow users to set variables to null (and thus remove the field).  This should be corrected.  For instance, 
> {code}
> "fieldTransformations" : [
>         { "transformation" : "STELLAR"
>         ,"output" : [ "new_field", "new_field2"]
>         ,"config" : {
>           "new_field" : "old_field"
>          ,"new_field2" : "old_field2"
>          ,"old_field" : "null"
>          ,"old_field2" : "null"
>                     }
>         }
> ]
> {code}
> should rename "old_field" to "new_field and "old_field2" to "old_field2"  The current behavior is to keep all 4 fields and to not change old_field or old_field2 at all.



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