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https://issues.apache.org/jira/browse/TINKERPOP-3261?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18094653#comment-18094653
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ASF GitHub Bot commented on TINKERPOP-3261:
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spmallette commented on code in PR #3483:
URL: https://github.com/apache/tinkerpop/pull/3483#discussion_r3546266200
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tinkergraph-gremlin/src/main/java/org/apache/tinkerpop/gremlin/tinkergraph/structure/TinkerTransactionGraph.java:
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Review Comment:
Bad statistics to GQL planner if we don't account for multi-label.
> Enable multiple label support on vertex with configurable label cardinality
> ---------------------------------------------------------------------------
>
> Key: TINKERPOP-3261
> URL: https://issues.apache.org/jira/browse/TINKERPOP-3261
> Project: TinkerPop
> Issue Type: Task
> Affects Versions: 4.0.0
> Reporter: Yang Xia
> Priority: Major
>
> Vertices are currently limited to a single immutable label assigned at
> creation. This prevents modeling common real-world scenarios where entities
> naturally belong to multiple categories (e.g., a person who is both an
> employee and a manager).
>
> Introduce a configurable LabelCardinality that controls how many labels a
> vertex may have and whether they can be mutated after creation. Three
> proposed modes: ONE (current behavior, default), ONE_OR_MORE (mutable,
> minimum one), ZERO_OR_MORE (fully flexible).
>
> New steps:
>
> - labels() — flatMap step emitting each label as a traverser
> - addLabel(String, String...) — add labels to a vertex
> - dropLabel(String, String...) — remove specific labels
> - dropLabels() — remove all labels
> Edge labels remain at cardinality ONE. The infrastructure would support
> future edge multi-label enablement without wire format changes.
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