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https://issues.apache.org/jira/browse/TINKERPOP-2674?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17466962#comment-17466962
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Stephen Mallette commented on TINKERPOP-2674:
---------------------------------------------
As kelvin mentioned, this behavior is expected - to demonstrate I removed
{{simplePath()}} and added {{path()}} to show the output:
{code}
gremlin> g.V().
......1> has('[avm]Design', 'uuid', 'SRC_UUID').as('r0').
......2> select('r0').
......3> repeat(__.in('inside')).
......4> emit().
......5> until(__.in('inside').count().is(0)).path()
==>[v[0],v[0],v[4]]
==>[v[0],v[0],v[4],v[7]]
==>[v[0],v[0],v[4],v[13]]
==>[v[0],v[0],v[4],v[7],v[10]]
==>[v[0],v[0],v[4],v[13],v[16]]
{code}
You immediately hit a "simple path" at the {{select('r0')}}. If you really
wanted that kind of traversal you would need to tell {[simplePath()}} where you
wanted to evaluate the path from:
{code}
gremlin> g.V().
......1> has('[avm]Design', 'uuid', 'SRC_UUID').as('r0').
......2> select('r0').as('a').
......3> repeat(__.in('inside').simplePath().from('a')).
......4> emit().
......5> until(__.in('inside').count().is(0))
==>v[4]
==>v[7]
==>v[13]
==>v[10]
==>v[16]
{code}
> `as('a')` step followed by `select('a')` not behaving as expected
> -----------------------------------------------------------------
>
> Key: TINKERPOP-2674
> URL: https://issues.apache.org/jira/browse/TINKERPOP-2674
> Project: TinkerPop
> Issue Type: Bug
> Components: tinkergraph
> Affects Versions: 3.5.1
> Reporter: Fredrick Eisele
> Priority: Major
>
> The inclusion of the `select()` step changes the result when it should not.
> Steps to replicate.
> Given a graph:
> {code:groovy}
> g.addV('[avm]Design').as('root').
> property('VertexLabel','[avm]Design').
> property('uuid','SRC_UUID').
> property('[]Name', 'Axe').
> addV('[]RootContainer').as('rc').
> property('VertexLabel','[]RootContainer').
> property('[]Name','Axe').
> addV('[]Property').as('p1').
> property('VertexLabel','[]Property').
> property('[]XPosition','56').
> addV('[]Value').as('v1').
> property('VertexLabel','[]Value').
> property('[]stuff','12').
> addV('[]Property').as('p2').
> property('VertexLabel','[]Property').
> property('[]XPosition','80').
> addV('[]Value').as('v2').
> property('VertexLabel','[]Value').
> property('[]stuff','90').
> addE('inside').from('rc').to('root').
> addE('inside').from('p1').to('rc').
> addE('inside').from('v1').to('p1').
> addE('inside').from('p2').to('rc').
> addE('inside').from('v2').to('p2').
> iterate()
> {code}
> The following two queries {color:#FF0000}*incorrectly*{color} produce
> different results.
> This first query produces a list of all the vertices with the exception of
> 'r0'.
> {code:groovy}
> g.V().
> has('[avm]Design', 'uuid', 'SRC_UUID').as('r0').
> repeat(__.in('inside').simplePath()).
> emit().
> until(__.in('inside').count().is(0)).
> toList()
> {code}
> The addition of the `select('r0')` step in this query causes no vertices to
> be returned.
> {code:groovy}
> g.V().
> has('[avm]Design', 'uuid', 'SRC_UUID').as('r0').
> select('r0').
> repeat(__.in('inside').simplePath()).
> emit().
> until(__.in('inside').count().is(0)).
> toList()
> {code}
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