import * as mssql from 'mssql';
import { ITableDefinition } from '@datahu/core';
export interface ISqlServerConfig {
    title: string;
    server: string;
    port: number;
    user: string;
    password: string;
    database: string;
    options: object;
}
export declare class SqlServerHelper {
    config: ISqlServerConfig;
    pool?: mssql.ConnectionPool;
    constructor(config: ISqlServerConfig);
    createPool(): void;
    query(sql: string): any;
    private getColumnType;
    getTables(): Promise<Array<ITableDefinition>>;
    private getSql;
    getData(tables: Array<ITableDefinition>): Promise<Array<object>>;
    end(): void;
}