import type { PgErrorFields } from './types';
/**
 * PostgreSQL SQLSTATE codes for the native constraint violations we surface as
 * public Constructive codes.
 */
export declare const SQLSTATE_TO_CODE: Record<string, string>;
/** SQLSTATE for a user-raised `RAISE EXCEPTION` without an explicit ERRCODE. */
export declare const RAISE_EXCEPTION_SQLSTATE = "P0001";
/**
 * Extract extended PostgreSQL error fields from an error-like object. Returns
 * `null` when the value does not look like a pg error (no `code`/`detail`/
 * `where`).
 */
export declare function extractPgErrorFields(err: unknown): PgErrorFields | null;