import type { AggregationType as AggregationTypeEnum } from '../../types';
export interface GroupInfo {
    key: string;
    value: unknown;
    indices: number[];
    count: number;
    aggregations: Record<string, number>;
}
export declare function calculateGroups<TRow>(indices: readonly number[], rows: readonly TRow[], groupBy: string | string[], groupAggregations?: Record<string, AggregationTypeEnum[]>): GroupInfo[];
export declare function calculateAggregation<TRow>(indices: readonly number[], rows: readonly TRow[], field: string, type: AggregationTypeEnum): number;
export declare function calculateGroupAggregations<TRow>(indices: readonly number[], rows: readonly TRow[], aggregations: Record<string, AggregationTypeEnum[]>): Record<string, number>;