import type { ConnectionConfig, Dialect, Driver, ExecuteResult, QueryResult, Unlisten } from './Driver';
import type { DatabaseSchema } from '../schema/types';
export declare const PostgresDialect: Dialect;
export declare class PostgresDriver implements Driver {
    readonly dialect: Dialect;
    private pool;
    private txClient;
    private listenClient?;
    private readonly listenHandlers;
    connect(config: ConnectionConfig): Promise<void>;
    private get runner();
    query(sql: string, params?: unknown[]): Promise<QueryResult>;
    execute(sql: string, params?: unknown[]): Promise<ExecuteResult>;
    introspect(schema?: string): Promise<DatabaseSchema>;
    transaction<T>(fn: () => Promise<T>): Promise<T>;
    close(): Promise<void>;
    listen(channel: string, handler: (payload: string) => void): Promise<Unlisten>;
}