Properly catching invalid connection init level errors

createConnection connect with database as soon its called. So you can query directly like

let connection = mysql2.createConnection({});

connection.query('SELECT 1+1');

But this pose an issue, say when you pass invalid credentials. It will throw an async error which cannot be caught unless we use process.uncaughtException or domains.

Is there any way we can handle this error properly without using hacks. This is also a deviation from node-mysql API, which allow creating connections without actually connecting.

May be we should add a version of createConnection which does not connect with server unless we explicitly call connect. So if connect fails we can handle any errors properly.

[sushantdhiman]

I found connect event, Let me try this

[sushantdhiman]

Please check this test case https://github.com/sidorares/node-mysql2/pull/356