promise friendly implementation for connection.queryStream()

[mariadb-corporation]

promise friendly implementation for connection.queryStream()

[jimmyolo]

if your node >= 10.x I prefer use this for-await-of loop

	for await (const row of connection.queryStream(cmd)) {
		console.log(row);
	}
	connection.end();

[rusher]

I tend to agree with @victor0801x using standard es2018 asynchronous iteration seem more appropriate, even if requiring node.js 10+.

Implementation is for the moment not as performant compared to event

I mean :

	for await (const row of connection.queryStream(cmd)) {
		console.log(row);
	}
	connection.end();

is less performant compared to

	connection.queryStream(cmd)
		.on('data', row => {
			console.log(row);
		 })
		.on('end', () => {
			connection.end();
		});

but is more readable

[goshoo]

Thank you, @rusher