/**
 * Relationship helpers for dataset definitions.
 *
 * These helpers currently define semantic model metadata only. The shipped
 * semantic client does not yet resolve relationship paths into joined dataset queries
 * or cross-dataset metrics.
 *
 * @example
 * ```ts
 * const Orders = dataset("orders", {
 *   source: "orders",
 *   fields: { ... },
 *   relationships: {
 *     customer: belongsTo(() => Customers, { from: "customerId", to: "id" }),
 *   },
 * });
 * ```
 */
import type { RelationshipDefinition } from './types.js';
/** Many-to-one relationship (FK on this table). */
export declare function belongsTo<TTarget extends {
    __type: 'dataset';
    name: string;
}>(target: () => TTarget, join: {
    from: string;
    to: string;
}): RelationshipDefinition<TTarget, 'belongsTo'>;
/** One-to-many relationship (FK on target table). */
export declare function hasMany<TTarget extends {
    __type: 'dataset';
    name: string;
}>(target: () => TTarget, join: {
    from: string;
    to: string;
}): RelationshipDefinition<TTarget, 'hasMany'>;
/** One-to-one relationship (FK on target table). */
export declare function hasOne<TTarget extends {
    __type: 'dataset';
    name: string;
}>(target: () => TTarget, join: {
    from: string;
    to: string;
}): RelationshipDefinition<TTarget, 'hasOne'>;
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