Linux C++ mysql create table and insert data into table,mysqlconnector set global net_read_timeout=3600

sudo apt-get install libmysqlcppconn-dev;

sudo mysql -u root -p;

//3600 seconds
SET @@global.net_read_timeout=3600;

//Util.h

#ifndef Util_H
#define Util_H

#include <chrono>
#include <ctime>
#include <fstream> 
#include <iostream>
#include "mysql_connection.h"
#include <cppconn/driver.h>
#include <cppconn/exception.h>
#include <cppconn/resultset.h>
#include <cppconn/statement.h>
#include <cppconn/prepared_statement.h>
#include <sstream>
#include <stdlib.h>
#include <thread>
#include <unistd.h>
#include <uuid/uuid.h>

using namespace std;

class Util
{
public:
    static char *uuidValue;
    static char *dtValue;
    char *getTime();
    char *getUuid(); void mysql2(int len);
};

#endif

#include "Model/Util.h"

char *Util::dtValue = (char *)malloc(20);
char *Util::uuidValue = (char *)malloc(40);

void Util::mysql2(int len)
{
    try
    {
        sql::Driver *dvr;
        sql::Connection *conn;
        sql::Statement *stmt;
        sql::PreparedStatement *pstmt;

        dvr = get_driver_instance();
        conn = dvr->connect("tcp://127.0.0.1:3306", "root", "Password");
        conn->setSchema("db");

        stringstream ss;
        uint64_t num = 0;

        for (int i = 0; i < len; i++)
        {
            ss = stringstream();
            if (conn->isClosed())
            {
                dvr = get_driver_instance();
                conn = dvr->connect("tcp://127.0.0.1:3306", "root", "Password");
                conn->setSchema("db");
            }
            stmt = conn->createStatement();
            ss << "drop table if exists mt" << i << ";";
            stmt->execute(ss.str());
            ss = stringstream();
            ss << "create table if not exists mt" << i << "(BookIndex int not null auto_increment,BookId bigint not null,BookName varchar(40) not null,BookTitle varchar(40) not null,primary key (BookIndex));" << endl;

            bool isCreated = stmt->execute(ss.str());
            if (!isCreated)
            {
                cout << "Create table mt" << i << " successfully!" << endl;
            }

            ss = stringstream();
            ss << "insert into mt" << i << "(BookId,BookName,BookTitle) values ";
            for (int j = 1; j <= 1000000; j++)
            {
                ss << "(" << ++num << ",'" << getUuid() << "','" << getUuid() << "'),";
            }
            cout<<__LINE__<<endl;
            string str = ss.str().substr(0, ss.str().length() - 1);
            if (conn->isClosed())
            {
                dvr = get_driver_instance();
                conn = dvr->connect("tcp://127.0.0.1:3306", "root", "Password");
                conn->setSchema("db");
            }
            cout<<__LINE__<<endl;
            isCreated = stmt->execute(str);  
            cout<<__LINE__<<endl;
            if (!isCreated)
            {
                cout << getTime() << ",num=" << num << ",Insert into mt" << i << " successfully!" << endl;
            }
            ss = stringstream(); 
            cout<<"IsClosed="<<conn->isClosed()<<endl;
        }
        delete stmt;
        delete pstmt;
        delete conn;
    }
    catch (sql::SQLException &ex)
    {
        cout << "#ERR: SQLException in " << __FILE__ << "," << __FUNCTION__ << "," << __LINE__ << endl;
        cout << ex.what() << endl;
        cout << "Error code:" << ex.getErrorCode() << ",state:" << ex.getSQLState() << endl;
        return;
    }

    cout << getTime() << ",finished in " << __FUNCTION__ << endl;
} 

char *Util::getTime()
{
    time_t rawTime = time(NULL);
    struct tm tmInfo = *localtime(&rawTime);
    strftime(dtValue, 20, "%Y%m%d%H%M%S", &tmInfo);
    return dtValue;
}

char *Util::getUuid()
{
    uuid_t newUUID;
    uuid_generate(newUUID);
    uuid_unparse(newUUID, uuidValue);
    return uuidValue;
}

#include "Model/Util.h"

void mysql2(int len);

int main(int args,char **argv)
{
    try
    {
        mysql2(atoi(argv[1]));
    }
    catch(const std::exception& e)
    {
        std::cerr << e.what() << 'n';
    }

}

void mysql2(int len)
{
    Util ul;
    ul.mysql2(len);
}

g++ -g -std=c++2a -I. *.cpp ./Model/*.cpp -o h1 -luuid -lpthread -lmysqlcppconn

time ./h1 10000;