[jira] [Created] (TINKERPOP-2312) Empty keys to group() should group to null

[Stephen Mallette (Jira)]

Stephen Mallette created TINKERPOP-2312:
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             Summary: Empty keys to group() should group to null
                 Key: TINKERPOP-2312
                 URL: https://issues.apache.org/jira/browse/TINKERPOP-2312
             Project: TinkerPop
          Issue Type: Improvement
          Components: process
    Affects Versions: 3.5.0
            Reporter: Stephen Mallette


With TINKERPOP-2235 in place, {{null}} becomes valid to the language which 
means that we could fix:

{code}
gremlin> g.V().group().by('age')
The property does not exist as the key has no associated value for the provided 
element: v[3]:age
Type ':help' or ':h' for help.
Display stack trace? [yN]n
{code}

so that users dont' need to do added filtering magic to deal with those kinds 
of exceptions. 



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