GoでSELECT *列を[]文字列に解析する方法は?

package main

import (
    "database/sql"
    "fmt"
    "strings"

    "github.com/go-sql-driver/mysql"
)

func main() {
    // Connect to the database.
    db, err := sql.Open("mysql", "user:password@tcp(localhost:3306)/test_database")
    if err != nil {
        panic(err)
    }
    defer db.Close()

    // Query the database.
    query := "SELECT * FROM my_table"
    rows, err := db.Query(query)
    if err != nil {
        panic(err)
    }
    defer rows.Close()

    // Get the columns.
    columns, err := rows.Columns()
    if err != nil {
        panic(err)
    }

    // Create an initial slice of strings.
    result := make([]string, len(columns))

    // Scan the rows.
    for rows.Next() {
        // Create a slice of interface values.
        values := make([]interface{}, len(columns))

        // Store pointers to the string slice in the interface slice.
        for i, _ := range values {
            values[i] = &result[i]
        }

        if scanErr := rows.Scan(values...); scanErr != nil {
            panic(scanErr)
        }

        // Handle null values.
        for i, col := range values {
            if col == nil {
                result[i] = "\N"
            }
        }
        // Print the result.
        fmt.Println(strings.Join(result, "\t"))
    }
}