for (var ai=0; ai<that.result.rows.length;ai++) {

  if (!(that.instance.attribnames[that.result.rows[ai][0])) {

    var a = {};

    a.attid = null;

    a.attname = that.result.rows[ai][0];

    a.attsval = null;

    a.attnval = null;

    a.attbval = null;

    this.instance.attributes.push(a);

  }

}