/**
 * Aggregate operations for computing scalar values from entity collections.
 *
 * Implements count, sum, avg, min, max aggregations in a single pass.
 * All aggregates are computed simultaneously for efficiency.
 */
import type { AggregateResult, GroupedAggregateConfig, GroupedAggregateResult, ScalarAggregateConfig } from "../../types/aggregate-types.js";
/**
 * Compute scalar aggregates over an array of entities.
 *
 * Performs a single-pass reduction computing all requested aggregates simultaneously.
 * This is O(n * k) where n is entities and k is aggregate operations — effectively O(n).
 *
 * @param entities - Array of entities to aggregate
 * @param config - Aggregate configuration specifying which operations to perform
 * @returns AggregateResult with only the requested aggregations
 */
export declare const computeAggregates: (entities: ReadonlyArray<Record<string, unknown>>, config: ScalarAggregateConfig) => AggregateResult;
/**
 * Compute grouped aggregates over an array of entities.
 *
 * Partitions entities into groups based on groupBy fields, then applies
 * computeAggregates within each group. Groups are ordered by first encounter.
 *
 * @param entities - Array of entities to aggregate
 * @param config - Grouped aggregate configuration specifying groupBy and operations
 * @returns GroupedAggregateResult array with group objects
 */
export declare const computeGroupedAggregates: (entities: ReadonlyArray<Record<string, unknown>>, config: GroupedAggregateConfig) => GroupedAggregateResult;
//# sourceMappingURL=aggregate.d.ts.map