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https://issues.apache.org/jira/browse/TINKERPOP-1332?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15324999#comment-15324999
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Marko A. Rodriguez commented on TINKERPOP-1332:
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[~rspitzer] — the reason it just looks like a “long list of strategies but no
application” is because there are no optimizations being done on
{{g.V().count()}} .. each applied strategy in the list does “nothing” and thus,
doesn’t alter the traversal for the next strategy in the list. However,
{{GraphFilterStrategy}} DOES do something, but its “meta” (not part of the
traversal), but I will expose it by having the `VertexProgramStep.toString()`
showing applied {{GraphFilters}}.
> Improve .explain() Dialogue
> ----------------------------
>
> Key: TINKERPOP-1332
> URL: https://issues.apache.org/jira/browse/TINKERPOP-1332
> Project: TinkerPop
> Issue Type: Improvement
> Reporter: Russell Alexander Spitzer
> Priority: Minor
>
> Currently the output of explain gives you a long list of strategies but no
> details about their application
> {code}
> ==>Traversal Explanation
> ============================================================================================================================
> Original Traversal [GraphStep(vertex,[]), CountGlobalStep]
> HaltedTraverserStrategy [D] [GraphStep(vertex,[]), CountGlobalStep]
> ConnectiveStrategy [D] [GraphStep(vertex,[]), CountGlobalStep]
> VertexProgramStrategy [D]
> [TraversalVertexProgramStep([GraphStep(vertex,[]), CountGlobalStep]),
> ComputerResultStep]
> OrderLimitStrategy [O]
> [TraversalVertexProgramStep([GraphStep(vertex,[]), CountGlobalStep]),
> ComputerResultStep]
> IdentityRemovalStrategy [O]
> [TraversalVertexProgramStep([GraphStep(vertex,[]), CountGlobalStep]),
> ComputerResultStep]
> FilterRankingStrategy [O]
> [TraversalVertexProgramStep([GraphStep(vertex,[]), CountGlobalStep]),
> ComputerResultStep]
> IncidentToAdjacentStrategy [O]
> [TraversalVertexProgramStep([GraphStep(vertex,[]), CountGlobalStep]),
> ComputerResultStep]
> RangeByIsCountStrategy [O]
> [TraversalVertexProgramStep([GraphStep(vertex,[]), CountGlobalStep]),
> ComputerResultStep]
> AdjacentToIncidentStrategy [O]
> [TraversalVertexProgramStep([GraphStep(vertex,[]), CountGlobalStep]),
> ComputerResultStep]
> MatchPredicateStrategy [O]
> [TraversalVertexProgramStep([GraphStep(vertex,[]), CountGlobalStep]),
> ComputerResultStep]
> GraphFilterStrategy [O]
> [TraversalVertexProgramStep([GraphStep(vertex,[]), CountGlobalStep]),
> ComputerResultStep]
> PathProcessorStrategy [O]
> [TraversalVertexProgramStep([GraphStep(vertex,[]), CountGlobalStep]),
> ComputerResultStep]
> SparkInterceptorStrategy [P]
> [TraversalVertexProgramStep([GraphStep(vertex,[]), CountGlobalStep]),
> ComputerResultStep]
> SparkSingleIterationStrategy [P]
> [TraversalVertexProgramStep([GraphStep(vertex,[]), CountGlobalStep]),
> ComputerResultStep]
> ProfileStrategy [F]
> [TraversalVertexProgramStep([GraphStep(vertex,[]), CountGlobalStep]),
> ComputerResultStep]
> LambdaRestrictionStrategy [V]
> [TraversalVertexProgramStep([GraphStep(vertex,[]), CountGlobalStep]),
> ComputerResultStep]
> ComputerVerificationStrategy [V]
> [TraversalVertexProgramStep([GraphStep(vertex,[]), CountGlobalStep]),
> ComputerResultStep]
> StandardVerificationStrategy [V]
> [TraversalVertexProgramStep([GraphStep(vertex,[]), CountGlobalStep]),
> ComputerResultStep]
> Final Traversal
> [TraversalVertexProgramStep([GraphStep(vertex,[]), CountGlobalStep]),
> ComputerResultStep]
> {code}
> It would be helpful if filter strategies for example would list the filters
> used.
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