如何关闭我的异步数据库连接？

Question

您好，我正在尝试执行一个 node.js 函数来打开数据库连接，执行查询，然后关闭。

一切正常，直到我需要关闭连接为止。我假设我的语法有问题，但我无法弄清楚。

代码如下：

async function databaseConnection() {
    const mysql = require('mysql2/promise');

    var connection = await mysql.createConnection({
            host:'*******' 
        ,   user:'*******' 
        ,   password:'*******' 
        ,   database:'*******' 
    });

    var q = 'SELECT ******* AS sha1 FROM ******* limit 10';

    await connection.execute(q, function(err, rows, fields) {
        if(err){
            console.log("An error ocurred performing the query." + err);
            return;
        }else{
            console.log("Query succesfully executed: ");
            rows.forEach( (row) => {
                console.log('sha1 from db row: ' + row.sha1);
            });
        }
    });
    await connection.end(); 
}

databaseConnection();

Answer 1

Nik Kyriakides 提出了一个关于混合 async/await 与回调的很好的观点，这解决了我的问题。我将其粘贴在这里以回答问题：

I don't know about your connection end issues but this line looks wrong: await connection.execute(q, function(err, rows, fields). You're mixing async/await and error-first callbacks. Use one or the other. You probably want to do something like: const rows = await connection.execute(q). – Nik Kyriakides 57 mins ago

如何关闭我的异步数据库连接？

How to do get my async database connection to close?

node.js

async-await

es6-promise

mysql2