import type { DbIntrospector, ColumnInfo, ForeignKeyInfo, EnumInfo } from '../db-introspector.js';
export interface QueryClient {
    query<T = unknown>(sql: string, params?: unknown[]): Promise<{
        rows: T[];
    }>;
    end(): Promise<void>;
}
export declare class PostgresIntrospector implements DbIntrospector {
    private client;
    private ownsClient;
    constructor(clientOrConnectionString: QueryClient | string);
    connect(): Promise<void>;
    listTables(): Promise<string[]>;
    getColumns(table: string): Promise<ColumnInfo[]>;
    getForeignKeys(table: string): Promise<ForeignKeyInfo[]>;
    getAllColumns(): Promise<Map<string, ColumnInfo[]>>;
    getAllForeignKeys(): Promise<Map<string, ForeignKeyInfo[]>>;
    listEnums(): Promise<EnumInfo[]>;
    close(): Promise<void>;
}