MYSQL C API : mysql_real_escape_string 二进制数据存储

#include <iostream>
#include <string>

#include <string.h>

#include <mysql.h>

int main()
{
    // 初始化MYSQL 实例
    MYSQL *ms_conn = mysql_init(NULL);
    if (ms_conn == NULL)
    {
        std::cout << "mysql init failed." << std::endl;
        return 0;
    }
    std::cout << "mysql init successful." << std::endl;

    // 连接到MYSQL 服务器
    MYSQL *ms_ret = mysql_real_connect(ms_conn, "localhost", "root", 
            "123456sx", "temp", 0, NULL, 0);
    if (ms_ret == NULL)
    {
        std::cout << "mysql connect failed." << std::endl;
        std::cout << mysql_error(ms_conn) << std::endl;
        mysql_close(ms_conn), ms_conn = NULL;
        return 0;
    }
    std::cout << "mysql connect successful." << std::endl;

    // 待存到MYSQL 的二进制数据
    char bin_data[] = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9};

    // 转义二进制数为一条字符串数据，
    // 同时mysql_real_escape_string() 生成的字符串会自动添加尾零
    char *escape_bin = new char[sizeof(bin_data) * 2 + 1];
    mysql_real_escape_string(ms_conn, 
            escape_bin, bin_data, sizeof(bin_data));

    // 生成SQL 语句
    std::string str_sql = "";
    str_sql += "INSERT INTO tb_bin_data(bin_data) VALUES('";
    str_sql += escape_bin;
    str_sql += "')";

    delete [] escape_bin, escape_bin = NULL;

    int res = 0;
    res = mysql_real_query(ms_conn, str_sql.c_str(), 
            str_sql.size());
    if (res != 0)
    {
        std::cout << "Error: query failed. " 
            << mysql_error(ms_conn) << std::endl;
    }
    else
    {
        std::cout << "Info: query successful." << std::endl;
    }

    // 释放资源
    mysql_close(ms_conn), ms_conn = NULL;
    return 0;
}