MySql Connector/C++8事務處理Demo

#include <iostream>
#include <exception>
#include <vector>
#include <unistd.h>


#include <mysqlx/xdevapi.h>


#define D_USER  "root"
#define D_PWD   "mysql"
#define D_HOST  "localhost"
#define D_PORT  33060
#define D_DB    "D_COMPANY"


using std::cout;
using std::endl;


int main(void)
try 
{
        //建立會話
    mysqlx::Session sess(
                mysqlx::SessionOption::USER, D_USER,
                mysqlx::SessionOption::PWD, D_PWD,
                mysqlx::SessionOption::HOST, D_HOST,
                mysqlx::SessionOption::PORT, D_PORT,
                mysqlx::SessionOption::DB, D_DB,
                mysqlx::SessionOption::SSL_MODE, mysqlx::SSLMode::DISABLED
            );

        //打開事務，以後的DDL或DML操做都要手動提交或回滾
    cout << ">> turn on transaction." << endl;
    sess.startTransaction();

        //存儲保存點
    std::vector<std::string> savepoints;


    cout << ">> insert into t_dept." << endl;
    savepoints.emplace_back(sess.setSavepoint()); //設置保存點
    mysqlx::SqlStatement stmt = sess.sql("INSERT INTO T_DEPT VALUES(?, ?, ?)");
    stmt.bind(40, "OPERATIONS", "BOSTON");
    stmt.execute();

    cout << ">> insert into t_dept." << endl;
    savepoints.emplace_back(sess.setSavepoint());
    stmt = sess.sql("INSERT INTO T_DEPT VALUES(?, ?, ?)");
    stmt.bind(50, "ENGINEER", "BeiJing");
    stmt.execute();

    cout << ">> delete from t_dept." << endl;
    savepoints.emplace_back(sess.setSavepoint());
    mysqlx::SqlResult rset = sess.sql("DELETE FROM T_DEPT WHERE DEPTNO=40").execute();


    for(std::string str : savepoints) {
        cout << str << endl;
    }

    sess.rollbackTo(savepoints.at(2)); //回滾到指定保存點
    sess.commit(); //提到事務
    sess.close(); //關閉會話

    cout << "Done!" << endl;
}
catch (mysqlx::Error &err) 
{
    cout << "ERROR : " << err << endl;
    return -1;
}