/**
 * ctx.stats() — spec: "Runtime Context API / Data access". Path-resolved
 * (via getField, no per-feature copying) aggregation: count/min/max/mean/
 * stddev/p50/p95/histogram, matching the documented return shape exactly.
 */
import type { Shape } from "./ir";
export interface HistogramBin {
    x0: number;
    x1: number;
    count: number;
}
export interface Stats {
    count: number;
    min: number;
    max: number;
    mean: number;
    stddev: number;
    p50: number;
    p95: number;
    histogram: HistogramBin[];
}
export declare function computeStats(rows: readonly unknown[], field: string, shape: Shape): Stats;
/**
 * The columnar fast path (spec: "Columnar / GeoArrow Ingestion"): stats
 * straight off a column's typed array — no row objects, no field lookups,
 * no materialization. `values` is consumed (sorted in place after copying
 * non-finite entries out).
 */
export declare function statsFromColumn(column: ArrayLike<unknown>): Stats;