export declare type Aggregation = AverageAggregation | SumAggregation | StringMaxAggregation | StringMinAggregation | KeyAggregation | SelectionAggregation;
export declare type ViewAggregation = AverageAggregation | SumAggregation | StringMaxAggregation | StringMinAggregation | ConstrainedAggregation | SelectionAggregation;
export interface AverageAggregation {
    type: 'average';
}
export interface StringMinAggregation {
    type: 'stringMin';
}
export interface StringMaxAggregation {
    type: 'stringMax';
}
export interface SumAggregation {
    type: 'sum';
}
export interface ConstrainedAggregation {
    type: 'constrained';
    defaultAggregation: ViewAggregation;
}
export interface SelectionAggregation {
    type: 'selection';
    relationIds: string[];
}
export interface KeyAggregation {
    type: 'key';
    keys: string[];
    defaultAggregation: Aggregation;
}