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refactor: centralize distributed metric names - #680

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codex/centralize-distributed-metric-names
Open

refactor: centralize distributed metric names#680
gabotechs wants to merge 1 commit into
mainfrom
codex/centralize-distributed-metric-names

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@gabotechs

@gabotechs gabotechs commented Aug 26, 2026

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Metric names are part of the public contract of datafusion-distributed. Users inspecting metrics of their plans need to expect these specific metric names to be present. This PR adds them as part of the public API, with a brief documentation of what each metric name does.

  • centralize public DataFusion Distributed metric names and their emitter/value documentation
  • replace distributed runtime metric literals with the shared constants
  • re-export each public metric constant explicitly from the crate root

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