public InputStream getBinaryStream(int columnIndex) throws  SQLException { Blob blob = getBlob(columnIndex); return (blob == null) ? null : blob.getBinaryStream();
public InputStream getBinaryStream(int columnIndex) throws SQLException { return getField(columnIndex).getBinaryStream();
    public InputStream getBinaryStream(int columnIndex) throws  SQLException {        Blob blob = getBlob(columnIndex);        return (blob == null) ? null : blob.getBinaryStream();    }