import { Decorator } from './types';
/**
 * Marks a field as being sourced from a related table instead of collection table
 *
 * @param parentId The column name on the current table to join from
 * @param to The name of the related table
 * @param childId The column name on the related table to join to
 */
export declare function Relation(parentId: string, to: string, childId: string): Decorator;
/**
 * Marks a field as being sourced from a related table instead of collection table with a mapping table in between the two
 *
 * @param parentId The column name on the current table to join from
 * @param mapping The name of the mapping table to relate to
 * @param mappingParentId The column name of current table to join to on the mapping table
 * @param mappingChildId The column name of related table to join to from the mapping table
 * @param to The name of the related table
 * @param childId The column name on the related table to join to
 */
export declare function Relation(parentId: string, mapping: string, mappingParentId: string, mappingChildId: string, to: string, childId: string): Decorator;