C++向MySQL插入数据返回错误

Question

我从 MySQL 页面修改了一组代码来测试输入数据到 MySQL 表“列表”中。程序退出并出现以下错误

terminate called after throwing an instance of 'sql::SQLException'
  what():  
Aborted

我查了一下表，不知怎么的，数据插入成功了。我修改了这个程序以使用 for 循环重复插入数据，但最终循环在第一次迭代后退出(程序在第一次插入期间被迫退出)。

我也尝试过硬编码查询，它在 MySQL 中手动输入，但仍然有同样的问题。

#include <stdlib.h>
#include <iostream>
#include <string>
#include "mysql_connection.h"
#include <cppconn/driver.h>
#include <cppconn/exception.h>
#include <cppconn/resultset.h>
#include <cppconn/statement.h>
#include <mysql_driver.h>

using namespace std;

int main(void){
        cout << endl;
        cout << "Running test insert"  << endl;

        sql::Driver *driver;
        sql::Connection *con;
        sql::Statement *stmt;
        sql::ResultSet *res;

        /* Create a connection */
        driver = get_driver_instance();
        con = driver->connect("localhost", "dev", "1234");

        /* Connect to the MySQL test database */
        con->setSchema("million");

        string data("abc1234567890");

        stmt = con->createStatement();
        res = stmt->executeQuery("INSERT INTO list VALUES('0','" +
            data + "','" + data +"','" + data + "','" + data + "','" +     data + "');");
        }
        // replace with your statement
        delete res;
        delete stmt;
        delete con;

        cout << endl;

        return EXIT_SUCCESS;

}

用这个 try{} catch

try{....}
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;}

输出这个错误信息

# ERR: SQLException in test.cpp(main) on line 54
# ERR:  (MySQL error code: 0, SQLState: 00000 )

Answer 1

sql::SQLException 被抛出是因为 executeQuery() 函数应该在 SQL 查询之后返回一个 sql::ResultSet执行(例如 SELECT 语句)。对于不返回任何数据库选择(例如 CREATE、UPDATE)的 SQL 查询，还有另一个函数 execute()。

原始答案可以在这里找到:MySQL Query executes but throws exception