code: public void free() throws SQLException
      {
          if (freed)
          {
              return;
          }
  
          string = null;
          if (reader != null)
          {
              reader.close();
          }
          if (inputStream != null)
          {
              try
              {
                  inputStream.close();
              }
              catch (IOException ioe)
              {
                  // Do nothing
              }
          }
          freed = true;
      }
docs: Free the Blob object and releases the resources that it holds.
  The object is invalid once the free method is called.
  @throws SQLException if an error occurs