columna API reference - v0.5.0
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    Interface ExecutionEvent

    One executed plan node (or kernel) as reported by the backend that ran it.

    interface ExecutionEvent {
        backend: EngineKind;
        computeMs?: number;
        kernel?: string;
        ms?: number;
        node: string;
        reason?: string;
        rows?: number;
        transferMs?: number;
    }
    Index
    backend computeMs? kernel? ms? node reason? rows? transferMs?
    backend: EngineKind

    Backend that actually did the work for this node.

    computeMs?: number
    kernel?: string

    Named kernel when one applied (e.g. "rust:filterAnd2I32F64", "gpu:filter", "native:parallelGather").

    ms?: number

    Wall time of the node, ms (best effort; nested nodes overlap).

    node: string

    Plan node type, e.g. "filter", "groupBy".

    reason?: string

    Why the requested backend did not handle this node (set when backend differs from the requested engine).

    rows?: number
    transferMs?: number

    For GPU nodes: host↔device transfer vs. shader time, ms.

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