[jira] [Commented] (TINKERPOP-2235) Better handle the concept of null in traversals

["ASF GitHub Bot (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/TINKERPOP-2235?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16968635#comment-16968635 ] 

ASF GitHub Bot commented on TINKERPOP-2235:
-------------------------------------------

spmallette commented on pull request #1214: TINKERPOP-2235 Expand semantics of null 
URL: https://github.com/apache/tinkerpop/pull/1214
 
 
   https://issues.apache.org/jira/browse/TINKERPOP-2235
   
   This change makes `null` in traversals behave more consistently and expands its meaning to be a valid value that is not filtered away automatically by the traversal. Please see the upgrade docs for more information on the change as it provides a fair bit of detail. 
   
   This is a breaking change heading to 3.5.0 as traversal semantics sorta shift around a bit. It does also enable the possibility of other interesting changes as described in [TINKERPOP-2312](https://issues.apache.org/jira/browse/TINKERPOP-2312). 
   
   I've tested this manually in the console a fair bit and I'm actually surprised at how well it works without a heavy body of change (despite the size of the PR which is heavily weighted to tests and getting GLVs compliant).
   
   All tests pass with `docker/build.sh -t -n -i`
   
   VOTE +1
 
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> Better handle the concept of null in traversals
> -----------------------------------------------
>
>                 Key: TINKERPOP-2235
>                 URL: https://issues.apache.org/jira/browse/TINKERPOP-2235
>             Project: TinkerPop
>          Issue Type: Improvement
>          Components: process
>    Affects Versions: 3.4.2
>            Reporter: Stephen Mallette
>            Priority: Major
>              Labels: breaking
>
> Introduce a Gremlin specific {{Null}} object to better allow for conveying the notion of "null" in traversals allowing things like:
> {code}
> gremlin> g.inject(Null.instance())
> ==> null
> gremlin> g.V(1).property("x", 1).property("y", Null.instance()).property("z", 2))  
> ==> v[1]
> {code}
> See the linked DISCUSS thread for more information.



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