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Posted to dev@tinkerpop.apache.org by "Stephen Mallette (Jira)" <ji...@apache.org> on 2023/02/10 14:04:00 UTC
[jira] [Closed] (TINKERPOP-2854) Generated Traversal differs from v3.4.13 to v3.6.1
[ https://issues.apache.org/jira/browse/TINKERPOP-2854?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Stephen Mallette closed TINKERPOP-2854.
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Resolution: Not A Problem
> Generated Traversal differs from v3.4.13 to v3.6.1
> --------------------------------------------------
>
> Key: TINKERPOP-2854
> URL: https://issues.apache.org/jira/browse/TINKERPOP-2854
> Project: TinkerPop
> Issue Type: Bug
> Affects Versions: 3.6.1
> Reporter: Andrea Santurbano
> Priority: Major
>
> Hi everybody,
> I'm playing with Gremlin and OpenCypher query transpiler by using the following bytecode query:
> {code:java}
> [[], [inject( cypher.start), map([[], [project( GENERATED1, GENERATED2, GENERATED3), by([[], [constant(1)]]), by([[], [constant(2)]]), by([[], [constant(3)]]), select(values)]]), project(r), by([[], [project( GENERATED5, GENERATED6, GENERATED7), by([[], [identity()]]), by([[], [choose([[], [constant(binding[from=3])]], [[], [constant(binding[from=3])]], [[], [constant( cypher.null)]])]]), by([[], [choose([[], [constant(binding[to=1])]], [[], [constant(binding[to=1])]], [[], [constant( cypher.null)]])]]), select(values), map(lambda[cypherListSlice().apply(it)])]])]]{code}
> Using Gremlin 3.4.13 produces the following traversal:
>
>
> {code:java}
> [InjectStep([ cypher.start]), TraversalMapStep([ProjectStep([ GENERATED1, GENERATED2, GENERATED3],[[ConstantStep(1)], [ConstantStep(2)], [ConstantStep(3)]]), TraversalMapStep(values)]), ProjectStep([r],[[ProjectStep([ GENERATED5, GENERATED6, GENERATED7],[[IdentityStep], [ChooseStep([ConstantStep(3), HasNextStep],[[(eq(true)), [ConstantStep(3), EndStep]], [(eq(false)), [ConstantStep( cypher.null), EndStep]]])], [ChooseStep([ConstantStep(1), HasNextStep],[[(eq(true)), [ConstantStep(1), EndStep]], [(eq(false)), [ConstantStep( cypher.null), EndStep]]])]]), TraversalMapStep(values), LambdaMapStep(lambda)]])]{code}
> while 3.6.1 creates this one (we only upgraded the library and changed some package name references):
>
>
> {code:java}
> [InjectStep([ cypher.start]), TraversalMapStep([ProjectStep([ GENERATED1, GENERATED2, GENERATED3],[[ConstantStep(1)], [ConstantStep(2)], [ConstantStep(3)]]), TraversalMapStep(values)]), ProjectStep([r],[[ProjectStep([ GENERATED5, GENERATED6, GENERATED7],[[IdentityStep], [ChooseStep([ConstantStep(OUT), HasNextStep],[[(eq(true)), [ConstantStep(OUT), EndStep]], [(eq(false)), [ConstantStep( cypher.null), EndStep]]])], [ChooseStep([ConstantStep(IN), HasNextStep],[[(eq(true)), [ConstantStep(IN), EndStep]], [(eq(false)), [ConstantStep( cypher.null), EndStep]]])]]), TraversalMapStep(values), LambdaMapStep(lambda)]])]{code}
> Indeed the one in 3.6.1 is the wrong one because it adds some extra steps like {*}ConstantStep(IN){*}.
>
>
>
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