/// <reference types="node" />
import { Column, HDBReadableStream } from "./types";
export interface ResultSet<T = any> {
    readonly id: Buffer;
    readonly metadata: Array<Column>;
    readonly closed: boolean;
    readonly finished: boolean;
    readonly fetchSize: number;
    readonly averageRowLength: number;
    readonly readSize: number;
    readonly rowsWithMetadata: any;
    readonly useCesu8: boolean;
    readonly ignoreDefaultLobType: boolean;
    /**
     * set fetch size
     *
     * @default 1024
     * @param size
     */
    setFetchSize(size: number): void;
    /**
     * setAverageRowLength
     *
     * @default 64
     * @param length
     */
    setAverageRowLength(length: number): void;
    /**
     * set lob read size
     *
     * @default 204800
     * @param size
     */
    setReadSize(size: number): void;
    /**
     * return a readable stream, each chunk will be an object
     *
     * @param options
     */
    createObjectStream(options?: StreamOptions): HDBReadableStream<T>;
    /**
     * return a readable stream, each chunk will be an array of objects
     *
     * @param options
     */
    createArrayStream(options?: StreamOptions): HDBReadableStream<Array<T>>;
    /**
     * close result set
     */
    close(): void;
}
export interface StreamOptions {
    arrayMode?: boolean | number;
    objectMode?: boolean;
    threshold?: number;
}