export declare const loadOptionsEnvironment: () => {
    readonly host: string | undefined;
    readonly port: string | 3306;
    readonly username: string | undefined;
    readonly password: string;
    readonly database: string | undefined;
};
declare const _default: Readonly<{
    readonly HOST: string;
    readonly PORT: string | 3306;
    readonly USERNAME: string | undefined;
    readonly PASSWORD: string;
    readonly DATABASE: string | undefined;
    readonly CONNECTION_LIMIT: string | 151;
    readonly QUEUE_LIMIT: string | 0;
    readonly TIMEOUT: string | number;
    readonly CHARSET: string;
    readonly CONNECTION_ERROR: string | false;
    readonly CONNECTION_SUCCESS: string | false;
    readonly WAIT_FOR_CONNECTIONS: string | true;
    readonly DATE_STRINGS: string | false;
    readonly KEEP_ALIVE_DELAY: string | 0;
    readonly ENABLE_KEEP_ALIVE: string | true;
    readonly MULTIPLE_STATEMENTS: string | false;
    readonly CACHE: string;
}>;
export default _default;