[go-nuts] What am I missing here? FYI, I'm completely new to golang xD

['sebastian andersen' via golang-nuts]

This code want's me to believe that I have not declared any of the 
variables that I am currently trying to declare:

func deleteRow() {
    db, err := sql.Open("mysql", "root@/testshit")
    checkErr(err)

    // delete
    stmt, err = db.Prepare("delete from userinfo where uid=?")
    checkErr(err)

    res, err = stmt.Exec(id)
    checkErr(err)

    affect, err = res.RowsAffected()
    checkErr(err)

    fmt.Println(affect)

    db.Close()
}


Why is that? I don't understand that, it works fine in this context:

func main() {
    db, err := sql.Open("mysql", "root@/testshit")
    checkErr(err)

    // insert
    stmt, err := db.Prepare("INSERT userinfo SET 
username=?,departname=?,created=?")
    checkErr(err)

    res, err := stmt.Exec("astaxie", "dong", "2012-12-09")
    checkErr(err)

    id, err := res.LastInsertId()
    checkErr(err)

    fmt.Println(id)
    // update
    stmt, err = db.Prepare("update userinfo set username=? where uid=?")
    checkErr(err)

    res, err = stmt.Exec("astaxieupdate", id)
    checkErr(err)

    affect, err := res.RowsAffected()
    checkErr(err)

    fmt.Println(affect)

    // query
    rows, err := db.Query("SELECT * FROM userinfo")
    checkErr(err)

    for rows.Next() {
        var uid int
        var username string
        var department string
        var created string
        err = rows.Scan(&uid, &username, &department, &created)
        checkErr(err)
        fmt.Println(uid)
        fmt.Println(username)
        fmt.Println(department)
        fmt.Println(created)
    }

    // delete
    stmt, err = db.Prepare("delete from userinfo where uid=?")
    checkErr(err)

    res, err = stmt.Exec(id)
    checkErr(err)

    affect, err = res.RowsAffected()
    checkErr(err)

    fmt.Println(affect)

    db.Close()

}

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