import { Descriptor } from '../../state/index.js';
export declare function reducerSetDistinct(state: Descriptor, isDistinct: boolean): Descriptor;
/**
 *
 * This action extracts the execution of a single column from an existing descriptor
 * into a new one which allows to fetch the distinct values of the column.
 * It also adds an order ASC on the specified column for easier use.
 *
 * @param state The descriptor we would like to extract the distinct behavior from
 * @param virtualSourceId The id of the virtualSource concerned by the distinct
 * @param alias The alias of the input concerned by the distinct
 */
export declare function reducerCreateDistinctDescriptor(state: Descriptor, virtualSourceId: string, alias: string): Descriptor;