Matt Frantz created TINKERPOP3-792:
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Summary: select at start of match traversal on Map can fail
Key: TINKERPOP3-792
URL: https://issues.apache.org/jira/browse/TINKERPOP3-792
Project: TinkerPop 3
Issue Type: Bug
Components: process
Affects Versions: 3.0.0-incubating
Reporter: Matt Frantz
Assignee: Marko A. Rodriguez
{noformat}
g.V().valueMap()
.match(__.as('a').select('name').as('name'))
.select('name')
The provided match pattern is unsolvable: [[MatchStartStep(a),
SelectOneStep(name), MatchEndStep(name)]]
{noformat}
What I think it happening is that the {{select}} inside the {{match}} is using
{{Scope.GLOBAL}}. The workaround is to insert {{identity}}, but I'm not sure
why this works, as identity steps appear to be removed by strategy.
{noformat}
g.V().valueMap()
.match(__.as('a').identity().select('name').as('name'))
.select('name')
==>[marko]
==>[vadas]
==>[lop]
==>[josh]
==>[ripple]
==>[peter]
{noformat}
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