[jira] [Created] (TINKERPOP3-649) no-arg select dynamic keys

["Matt Frantz (JIRA)" <ji...@apache.org>]

Matt Frantz created TINKERPOP3-649:
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             Summary: no-arg select dynamic keys
                 Key: TINKERPOP3-649
                 URL: https://issues.apache.org/jira/browse/TINKERPOP3-649
             Project: TinkerPop 3
          Issue Type: Improvement
            Reporter: Matt Frantz


The currently implementation of the no-arg {{select}} form determines the set of labels via static analysis with {{TraversalHelper.getLabelsUpTo}}.  Instead, it should examine the {{Path}} and create a {{Map}} with keys for all labeled steps.

Compare the current behavior of a 3-arg select on the modern graph:
{noformat}
gremlin> g.V().choose{it -> it.id()%3}
  .option(0, __.as('x'))
  .option(1, __.as('y'))
  .option(2, __.as('z'))
  .select('x', 'y', 'z')
==>[y:v[1]]
==>[z:v[2]]
==>[x:v[3]]
==>[y:v[4]]
==>[z:v[5]]
==>[x:v[6]]
{noformat}

The expected behavior of {{select()}} in place of {{select('x', 'y', 'z')}} would be the same.



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