if err != nil {
		return n, err
	}

	// Do nothing if record-delimiter is already newline.
	if string(rr.recordDelimiter) == "\n" {
		return n, nil
	}

	// Change record delimiters to newline.
	if len(rr.recordDelimiter) == 1 {
		for idx := 0; idx < len(p); {
			i := bytes.Index(p[idx:], rr.recordDelimiter)
			if i < 0 {
				break
			}
			idx += i
			p[idx] = '\n'
		}
		return n, nil
	}

	asneeded = "asneeded"
)

// ReaderArgs - represents elements inside <InputSerialization><CSV> in request XML.
type ReaderArgs struct {
	FileHeaderInfo             string `xml:"FileHeaderInfo"`
	RecordDelimiter            string `xml:"RecordDelimiter"`
	FieldDelimiter             string `xml:"FieldDelimiter"`
	QuoteCharacter             string `xml:"QuoteCharacter"`
	QuoteEscapeCharacter       string `xml:"QuoteEscapeCharacter"`

	if err := d.DecodeElement(&parsedArgs, &start); err != nil {
		return err
	}

	switch len(parsedArgs.RecordDelimiter) {
	case 0:
		parsedArgs.RecordDelimiter = defaultRecordDelimiter
	case 1, 2:
	default:
		return fmt.Errorf("invalid RecordDelimiter '%v'", parsedArgs.RecordDelimiter)
	}

	*args = WriterArgs(parsedArgs)
	args.unmarshaled = true
	return nil

		var result bytes.Buffer

		r, _ := NewReader(io.NopCloser(strings.NewReader(c.content)), &ReaderArgs{
			FileHeaderInfo:             none,
			RecordDelimiter:            c.recordDelimiter,
			FieldDelimiter:             c.fieldDelimiter,
			QuoteCharacter:             defaultQuoteCharacter,
			QuoteEscapeCharacter:       defaultQuoteEscapeCharacter,
			CommentCharacter:           defaultCommentCharacter,
			AllowQuotedRecordDelimiter: false,

		panic(fmt.Errorf("empty args passed %v", args))
	}
	csvIn := io.Reader(readCloser)
	if args.RecordDelimiter != "\n" {
		csvIn = &recordTransform{
			reader:          readCloser,
			recordDelimiter: []byte(args.RecordDelimiter),
			oneByte:         make([]byte, len(args.RecordDelimiter)-1),
		}
	}

	r := &Reader{
		args:       args,
		buf:        bufio.NewReaderSize(csvIn, csvSplitSize*2),

		}
		buf.WriteString(s3Select.Output.CSVArgs.RecordDelimiter)

		return nil
	case jsonFormat:
		err := record.WriteJSON(buf)
		if err != nil {
			return err
		}
		// Trim trailing newline from non-simd output
		if buf.Bytes()[buf.Len()-1] == '\n' {
			buf.Truncate(buf.Len() - 1)
		}
		buf.WriteString(s3Select.Output.JSONArgs.RecordDelimiter)

		return nil
	}

- AWS S3's [reserved keywords](https://docs.aws.amazon.com/AmazonS3/latest/dev/s3-glacier-select-sql-reference-keyword-list.html) list is not yet respected.

        	<FieldDelimiter>,</FieldDelimiter>
        	<FileHeaderInfo>USE</FileHeaderInfo>
        	<QuoteCharacter>"</QuoteCharacter>
        	<QuoteEscapeCharacter>"</QuoteEscapeCharacter>
        	<RecordDelimiter>\n</RecordDelimiter>
        </CSV>
    </InputSerialization>
    <OutputSerialization>
        <CSV>
        </CSV>
    </OutputSerialization>
    <RequestProgress>
        <Enabled>FALSE</Enabled>