import { EventEmitter } from "events";
import { IDbConn, IDefaultDbConnConf, IQueryColumnDef, ISOLATION_LEVEL } from "@simplysm/sd-orm-common";
export declare class MssqlDbConn extends EventEmitter implements IDbConn {
    private readonly _tedious;
    readonly config: IDefaultDbConnConf;
    private readonly _logger;
    private readonly _timeout;
    private _conn?;
    private _connTimeout?;
    private _requests;
    isConnected: boolean;
    isOnTransaction: boolean;
    constructor(_tedious: typeof import("tedious"), config: IDefaultDbConnConf);
    connectAsync(): Promise<void>;
    closeAsync(): Promise<void>;
    beginTransactionAsync(isolationLevel?: ISOLATION_LEVEL): Promise<void>;
    commitTransactionAsync(): Promise<void>;
    rollbackTransactionAsync(): Promise<void>;
    executeAsync(queries: string[]): Promise<any[][]>;
    executeParametrizedAsync(query: string, params?: any[]): Promise<any[][]>;
    bulkInsertAsync(tableName: string, columnDefs: IQueryColumnDef[], records: Record<string, any>[]): Promise<void>;
    bulkUpsertAsync(_tableName: string, _columnDefs: IQueryColumnDef[], _records: Record<string, any>[]): Promise<void>;
    private _stopTimeout;
    private _startTimeout;
    private _convertColumnDefToTediousBulkColumnDef;
    private _convertColumnDataTypeToTediousBulkColumnType;
    private _guessTediousType;
}