import type * as Stream from 'stream';
import type { Connection, ConnPingParams, ConnPingResult, ConnBaseQueryParams, ConnQueryResult, ConnInsertParams, ConnInsertResult, ConnCommandResult, ConnExecParams, ConnExecResult } from '@clickhouse/client-common';
import type { TcpConnectionPool } from './pool';
/**
 * A Connection wrapper that acquires a connection from the pool for each
 * operation and releases it when done.
 */
export declare class PooledConnection implements Connection<Stream.Readable> {
    private pool;
    constructor(pool: TcpConnectionPool);
    ping(params?: ConnPingParams): Promise<ConnPingResult>;
    query(params: ConnBaseQueryParams): Promise<ConnQueryResult<Stream.Readable>>;
    insert(params: ConnInsertParams<Stream.Readable>): Promise<ConnInsertResult>;
    command(params: ConnBaseQueryParams & {
        ignore_error_response?: boolean;
    }): Promise<ConnCommandResult>;
    exec(params: ConnExecParams<Stream.Readable>): Promise<ConnExecResult<Stream.Readable>>;
    close(): Promise<void>;
}