code: func (pdb *BrokerCassa) ListValues(query sql.Expression) sql.ValIterator {
  	queryStr, binding, err := SelectExpToString(query)
  	if err != nil {
  		return &ErrIterator{err}
  	}
  
  	it := pdb.session.ScanIterator(queryStr, binding...)
  	return &ValIterator{it}
  }
docs: // ListValues retrieves an iterator for elements stored under the provided key.
  // ListValues runs query (AS-IS) using gocql Scan Iterator.