/**
 * Aggregation Builder
 *
 * Builds database aggregation queries from the uniform ORM interface.
 * Translates aggregation options to database-specific SQL or aggregation pipelines.
 */
import { DatabaseType } from '../types/enums';
import { IAggregateOptions, IGroupByOptions, IBuiltAggregation } from '../types/aggregation.interface';
/**
 * Aggregation builder for translating ORM aggregations to database-specific formats
 */
export declare class AggregationBuilder {
    private databaseType;
    constructor(databaseType: DatabaseType);
    /**
     * Build an aggregation query
     * @param options Aggregation options
     * @returns Built aggregation ready for execution
     */
    buildAggregation(options: IAggregateOptions): IBuiltAggregation;
    /**
     * Build a group by aggregation query
     * @param options Group by options
     * @returns Built aggregation ready for execution
     */
    buildGroupBy(options: IGroupByOptions): IBuiltAggregation;
    private buildPostgresAggregation;
    private buildPostgresGroupBy;
    private buildMySQLAggregation;
    private buildMySQLGroupBy;
    private buildMongoAggregation;
    private buildMongoGroupBy;
    private buildMongoAggregationField;
    private buildMongoMatch;
    private translateMongoOperators;
    private buildMongoHaving;
    private buildDynamoAggregation;
    private buildDynamoGroupBy;
    private buildCassandraAggregation;
    private buildCassandraGroupBy;
    private buildAggregationSelectClauses;
    private buildSingleAggregation;
    private buildStringAggregation;
    private buildWhereClause;
    private buildComparisonClause;
    private buildHavingClause;
    private buildHavingCondition;
    private escapeIdentifier;
    private getPlaceholder;
}
/**
 * Export aggregation operators for external use
 * Uses lowercase naming convention to match Mongoose/MongoDB style
 */
export declare const AggregationOperators: {
    readonly $count: "$count";
    readonly $sum: "$sum";
    readonly $avg: "$avg";
    readonly $min: "$min";
    readonly $max: "$max";
    readonly $stringAgg: "$stringAgg";
    readonly $groupConcat: "$groupConcat";
    readonly $arrayAgg: "$arrayAgg";
    readonly $first: "$first";
    readonly $last: "$last";
};
export type AggregationOperatorType = keyof typeof AggregationOperators;