我按照本教程(一次插入多行教程(将多行数据插入MySQL表("一次插入多行"一章(。
我对我的代码做了同样的事情,但是如果数据库足够好,我得到了一个 ECONNRESET 错误而不是我的连接。
错误详细信息如下:
{ Error: read ECONNRESET
at _errnoException (util.js:1022:11)
at TCP.onread (net.js:628:25)
--------------------
at Protocol._enqueue (C:Usersfrederic.fayetDesktopDEVNodeJSTER_V1 - Reprise après pausenode_modulesmysqllibprotocolProtocol.js:144:48)
at Connection.query (C:Usersfrederic.fayetDesktopDEVNodeJSTER_V1 - Reprise après pausenode_modulesmysqllibConnection.js:200:25)
at C:Usersfrederic.fayetDesktopDEVNodeJSTER_V1 - Reprise après pauseapp.js:340:24
at handlePromises (C:Usersfrederic.fayetDesktopDEVNodeJSTER_V1 - Reprise après pauseapp.js:242:9)
at promise.then (C:Usersfrederic.fayetDesktopDEVNodeJSTER_V1 - Reprise après pauseapp.js:251:20)
at <anonymous>
at process._tickCallback (internal/process/next_tick.js:188:7)
code: 'ECONNRESET',
errno: 'ECONNRESET',
syscall: 'read',
fatal: true }
我的代码如下,用于查询数据库:
db.query(sqlSchedules, [sqlDataSchedules], function (err, result) {
if (err) {
console.log(err);
return; //throw err;
}
//Get the number of inserted lines:
nbLinesSchedulesInserted = result.affectedRows;
console.log("Nombre d'éléments insérés : " + result.affectedRows);
});
数据库连接是:
db.connect(function(err) {
if (err) console.error('Error occured during the DB connection.');
console.log("DB connection: OK");
});
sqlDataSchedules 是一个数组,如下所示:
[ [ '848633',
'Amiens',
'162700',
'162700',
'20190509',
'20190702',
2019-05-31T07:27:09.710Z ],
[ '848633',
'Villers-Bretonneux',
'163800',
'163900',
'20190509',
'20190702',
2019-05-31T07:27:09.710Z ],
[ '849401',
'St Quentin',
'074500',
'074500',
'20190527',
'20190528',
2019-05-31T07:27:09.711Z ],
... 141377 more items ]
SQL 请求是:
INSERT INTO schedules (trainNumber, stopName, baseArrivalTime, baseDepartureTime, beginDate, endDate, updatedOn) VALUES ?
只需更改MySQL max_allowed_packet即可。例如:
max_allowed_packet=100M
在 my.ini 或 my.cnf 中。(不要忘记重启 MySQL 实例服务(它解决了我的问题。
我终于找到了使用 for 循环和异步函数的解决方案:
async function loopOverRequests(data, sqlRequest, tableName) {
let nbRequests = 0;
for (var i = 0; i<data.length; i++) {
nbRequests = nbRequests + await makeTheRequest(data[i], sqlRequest);
}
console.log(nbRequests + ' imported in the table `'+ tableName + '`.');
return new Promise((resolve, reject) => {
resolve(nbRequests);
});
}
function makeTheRequest(el, sqlRequest) {
return new Promise((resolve, reject) => {
db.query(sqlRequest, el, function (err, result) {
if (err) {
console.log(err);
reject(err); //throw err;
} else {
resolve(result.affectedRows);
}
});
});
}