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https://issues.apache.org/jira/browse/TINKERPOP-2235?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16968635#comment-16968635
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ASF GitHub Bot commented on TINKERPOP-2235:
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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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