import type { FieldKey } from './fieldKey';
import type { CompiledExpression } from './query/compiler';
import type { WindowFunctionType } from './query/dataQuery';
export interface WindowFunctionOptions {
    orderBy?: Array<{
        field: string;
        direction: string;
    }>;
    partitionBy?: string[];
    topN?: number;
    bottomN?: number;
}
export interface EngineFieldComputedExpression {
    type: 'computed';
    columns: FieldKey[];
    compiledExpression: CompiledExpression;
}
export interface EngineFieldWindowExpression<TNodeOptions = any> {
    type: 'window';
    functionType: WindowFunctionType;
    field: FieldKey;
    options: TNodeOptions;
}
export type EngineFieldExpression = EngineFieldComputedExpression | EngineFieldWindowExpression;