func (s3Select *S3Select) Open(rsc io.ReadSeekCloser) error {
	offset, length, err := s3Select.ScanRange.StartLen()
	if err != nil {
		return err
	}
	seekDirection := io.SeekStart
	if offset < 0 {
		seekDirection = io.SeekEnd
	}
	switch s3Select.Input.format {
	case csvFormat:
		_, err = rsc.Seek(offset, seekDirection)
		if err != nil {
			return err
		}