MYSQL C API : struct MYSQL_STMT 结构的组合使用

 #include <iostream>
 #include <string>

 #include <string.h>
 #include <assert.h>

 #include <mysql.h>

 static void do_stmt_sql(MYSQL *ms_conn);

 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 ;
     }
     std::cout << "mysql init successful." << std::endl;

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

     do_stmt_sql(ms_conn);

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

 static void do_stmt_sql(MYSQL *ms_conn)
 {
     assert(ms_conn != NULL);
     if (ms_conn == NULL)
         return ;

     MYSQL_STMT *stmt = NULL;
     stmt = mysql_stmt_init(ms_conn);
     if (stmt == NULL)
     {
         std::cout << "stmt is NULL. mysql_stmt_init failed. "
             << mysql_error(ms_conn) << std::endl;
         return ;
     }
     std::cout << "MYSQL_STMT init successful." << std::endl;

     const char str_sql[] = "INSERT INTO tb_bin_data(bin_data) VALUES(?)";

     int res = ;
     res = mysql_stmt_prepare(stmt, str_sql, sizeof(str_sql) - );
     if (res != )
     {
         std::cout << "mysql_stmt_prepare INSERT failed."
             << mysql_stmt_error(stmt) << std::endl;
         return ;
     }

     // 待存到MYSQL 的二进制数据
     char bin_data[] = {, , , , , , , , , };

     MYSQL_BIND bind[];
     memset(bind, , sizeof(bind));
     bind[].buffer_type = MYSQL_TYPE_BLOB;
     bind[].is_null = NULL;
     bind[].buffer = bin_data;
     bind[].buffer_length = sizeof(bin_data);

     res = mysql_stmt_bind_param(stmt, bind);
     if (res != )
     {
         std::cout << "mysql_stmt_bind_param failed. "
             << mysql_stmt_error(stmt) << std::endl;
         mysql_stmt_close(stmt), stmt = NULL;
         return ;
     }
     std::cout << "mysql_stmt_bind_param successful." << std::endl;

     // res = mysql_stmt_send_long_data(stmt, 0, escape_bin, strlen(escape_bin));
     // std::cout << "mysql_stmt_send_long_data result is " << res << std::endl;

     res = mysql_stmt_execute(stmt);
     std::cout << "mysql_stmt_execute() func result is " << res << std::endl;

     mysql_stmt_close(stmt), stmt = NULL;
 }