如何在Go中通过Cloud Function连接Cloud-SQL？

import (
    "database/sql"
    _ "github.com/go-sql-driver/mysql"
)

func ConnectToCloudSQL() (*sql.DB, error) {
    db, err := sql.Open("mysql", "username:password@tcp(IP地址:端口号)/数据库名称")
    if err != nil {
        return nil, err
    }
    return db, nil
}

func QueryDataFromCloudSQL(db *sql.DB) ([]string, error) {
    rows, err := db.Query("SELECT column FROM table")
    if err != nil {
        return nil, err
    }
    defer rows.Close()

    var results []string
    for rows.Next() {
        var result string
        err := rows.Scan(&result)
        if err != nil {
            return nil, err
        }
        results = append(results, result)
    }

    return results, nil
}

func MyCloudFunction(w http.ResponseWriter, r *http.Request) {
    db, err := ConnectToCloudSQL()
    if err != nil {
        // 处理连接错误
        return
    }
    defer db.Close()

    results, err := QueryDataFromCloudSQL(db)
    if err != nil {
        // 处理查询错误
        return
    }

    // 处理查询结果
    fmt.Fprint(w, results)
}