/**
 * Database Import — introspection layer
 *
 * Reads the schema of a live Postgres/Supabase database. This layer is
 * deliberately thin and side-effect-light: it only issues read-only SELECTs
 * against information_schema/pg_catalog and returns an `IntrospectedSchema`.
 * All interpretation lives in the conversion layer (pg-to-apsorc.ts).
 *
 * `pg` is loaded lazily so importing this module (e.g. from the command) does
 * not pull the driver until an actual connection is made.
 */
import { IntrospectedSchema, Introspector } from "./types";
/** Supabase- and Postgres-managed schemas we never import from. */
export declare const SYSTEM_SCHEMAS: Set<string>;
/** Strip credentials from a connection string for safe display in errors. */
export declare function redactConnectionString(input: string): string;
/**
 * Reads schema metadata from a Postgres database via a connection string.
 * SSL is enabled by default (Supabase requires it).
 */
export declare class PgIntrospector implements Introspector {
    private readonly connectionString;
    constructor(connectionString: string);
    private connect;
    introspect(schema: string): Promise<IntrospectedSchema>;
}
interface RawRows {
    tableRows: any[];
    columnRows: any[];
    pkRows: any[];
    fkRows: any[];
    uniqueRows: any[];
    indexRows: any[];
    enumRows: any[];
    schemaRows: any[];
}
/**
 * Assemble raw query rows into an IntrospectedSchema. Exported (separate from
 * the DB connection) so it can be unit-tested with fixture rows.
 */
export declare function buildSchema(schema: string, raw: RawRows): IntrospectedSchema;
export {};