C++ insert into table in bulk

1.Create table in mysql

CREATE TABLE `mt` (
  `BookIndex` int NOT NULL AUTO_INCREMENT,
  `BookId` bigint NOT NULL,
  `BookName` varchar(100) NOT NULL,
  `BookTitle` varchar(100) NOT NULL,
  PRIMARY KEY (`BookIndex`)
) 
//ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci

 

run below command to validate the table created statement.

desc mt;

 

 

 

 

2.Cpp code

#include <cppconn/driver.h>
#include <cppconn/resultset.h>
#include <cppconn/statement.h>
#include <cppconn/exception.h>
#include <cppconn/prepared_statement.h>
#include <iostream>
#include <sstream>
#include <string.h>

using namespace std;

static char *uuidValue = (char *)malloc(40);

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

void batchInsert(int loops);

int main(int args, char **argv)
{
    batchInsert(atoi(argv[1]));
}

void batchInsert(int loops)
{
    try
    {
        sql::Driver *driver;
        sql::Connection *conn;
        sql::PreparedStatement *prepStmt;
        driver=get_driver_instance();
        
        conn=driver->connect("tcp://127.0.0.1:3306","root","Password");
        conn->setSchema("myDB");

        stringstream ss;
        ss<<"insert into mt(BookId,BookName,BookTitle) values ";
        for(int i=0;i<loops;i++)
        {
            ss<<"("<<i<<",'"<<getUuid()<<"','"<<getUuid()<<"'),"<<endl;
        }        

        string str=ss.str();
        int lastIndex=str.find_last_of(",");
        str=str.erase(lastIndex);
        prepStmt=conn->prepareStatement(str);
        prepStmt->execute();
        delete prepStmt;
        delete conn;
    }
    catch (sql::SQLException &e)
    {
        cout << "# ERR: SQLException in " << __FILE__;
        cout << "(" << __FUNCTION__ << ") on line " << __LINE__ << endl;
        cout << "# ERR: " << e.what();
        cout << " (MySQL error code: " << e.getErrorCode();
        cout << ", SQLState: " << e.getSQLState() << " )" << endl;
    }
    cout<<"Finished in void batchInsert(int loops)!"<<endl;
}

 

3.Compile via g++ as below

g++ -g -std=c++2a -I. -Wall -I/usr/include/cppconn *.cpp ./Model/*.cpp -o h1 -luuid -lpthread -L/usr/lib -lmysqlcppconn

 

 

4.Execute the compiled result via

time ./h1 100000;

 

 

 

The fact has illustrated that insert into table once in bulk will be much faster than insert looply one by one.

5.Validate in mysql via sql  

select * from mt;

 

标签：insert,char,NULL,int,into,bulk,sql,table,include
来源： https://www.cnblogs.com/Fred1987/p/16271985.html