code: public void write(byte[] buf, int off, int len) throws SQLException {
      FastpathArg[] args = new FastpathArg[2];
      args[0] = new FastpathArg(fd);
      args[1] = new FastpathArg(buf, off, len);
      fp.fastpath("lowrite", args);
    }
docs: Writes some data from an array to the object.
  
  @param buf destination array
  @param off offset within array
  @param len number of bytes to write
  @throws SQLException if a database-access error occurs.