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https://issues.apache.org/jira/browse/TINKERPOP-1215?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15220650#comment-15220650
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Marko A. Rodriguez commented on TINKERPOP-1215:
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You have to {{cap}}. {{group}} has is a {{Generating}} step and needs to be
{{Generating.generateFinalResult()}}.
> Labeled a SideEffectCapStep cause problems.
> --------------------------------------------
>
> Key: TINKERPOP-1215
> URL: https://issues.apache.org/jira/browse/TINKERPOP-1215
> Project: TinkerPop
> Issue Type: Bug
> Components: process
> Affects Versions: 3.1.1-incubating
> Reporter: Marko A. Rodriguez
>
> {code}
> gremlin>
> g.V().hasLabel("person").aggregate("x").by("age").cap("x").as("y","z").select("x","y","z")
> ==>[x:[29, 27, 32, 35], y:[[29, 27, 32, 35], [29, 27, 32, 35]], z:[[29, 27,
> 32, 35], [29, 27, 32, 35]]] // BAD
> gremlin>
> g.V().hasLabel("person").aggregate("x").by("age").cap("x").filter{true}.as("y","z").select("x","y","z")
> ==>[x:[29, 27, 32, 35], y:[29, 27, 32, 35], z:[29, 27, 32, 35]] // GOOD
> {code}
> This only seems to be an issue with {{AggregateStep}}
> {code}
> gremlin>
> g.V().hasLabel("person").groupCount("a").cap("a").as("b","c").select("a","b","c")
> ==>[a:[v[1]:1, v[2]:1, v[4]:1, v[6]:1], b:[v[1]:1, v[2]:1, v[4]:1, v[6]:1],
> c:[v[1]:1, v[2]:1, v[4]:1, v[6]:1]]
> gremlin>
> g.V().hasLabel("person").aggregate("a").cap("a").as("b","c").select("a","b","c")
> ==>[a:[v[1], v[2], v[4], v[6]], b:[[v[1], v[2], v[4], v[6]], [v[1], v[2],
> v[4], v[6]]], c:[[v[1], v[2], v[4], v[6]], [v[1], v[2], v[4], v[6]]]]
> {code}
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