code: func (q *TxLogger) Queryx(query string, args ...interface{}) (*sqlx.Rows, error) {
  	start := time.Now()
  	rows, err := q.Tx.Queryx(query, args...)
  	logQuery(query, time.Since(start), args...)
  	return rows, err
  }
docs: // Queryx logs the queries executed by the Queryx method.