import type { GraphileConfig } from 'graphile-config';
/**
 * Type mapping configuration for custom PostgreSQL types.
 */
export interface TypeMapping {
    /** PostgreSQL type name */
    name: string;
    /** PostgreSQL schema/namespace name */
    namespaceName: string;
    /** GraphQL type to map to */
    type: 'String';
}
/**
 * Plugin that maps custom PostgreSQL types to GraphQL scalar types.
 *
 * This is useful for domain types or composite types that should be
 * represented as simple scalars (String, JSON) in the GraphQL API.
 *
 * For example, if you have:
 *   CREATE DOMAIN email AS text;
 *   CREATE TYPE url AS (value text);
 *
 * This plugin will map them to GraphQL String type instead of creating
 * complex object types.
 *
 * The plugin handles both:
 * 1. Domain types (simple aliases) - maps directly to the target scalar
 * 2. Composite types - extracts the first field's value when converting from PG
 */
export declare const PgTypeMappingsPlugin: GraphileConfig.Plugin;
/**
 * Preset that includes the PG type mappings plugin.
 *
 * This preset maps common custom PostgreSQL types to GraphQL scalars:
 * - email -> String
 * - hostname -> String
 * - url -> String
 * - origin -> String
 */
export declare const PgTypeMappingsPreset: GraphileConfig.Preset;
export default PgTypeMappingsPlugin;