writeResponse(w, serr.HTTPStatusCode(), encodedErrorResponse, mimeXML)
		} else {
			writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
		}
		return
	}
	defer s3Select.Close()

	if err = s3Select.Open(objectRSC); err != nil {
		if serr, ok := err.(s3select.SelectError); ok {
			encodedErrorResponse := encodeResponse(APIErrorResponse{
				Code:       serr.ErrorCode(),
				Message:    serr.ErrorMessage(),

    * It's now possible to use [Starlette's `StreamingResponse`](https://www.starlette.io/responses/#streamingresponse) with iterators, like [file-like](https://docs.python.org/3/glossary.html#term-file-like-object) objects (as those returned by `open()`).
    * It's now possible to use the low level utility `iterate_in_threadpool` from `starlette.concurrency` (for advanced scenarios).
    * PR [#243](https://github.com/tiangolo/fastapi/pull/243).