notice / notification logging from PostgreSQL is not working

Issue Description

Im trying to use afterConnect hook to intercept notice and notiification events from a PostgreSQL database

What are you doing?

const config = {
  username: 'username',
  password: 'password',
  database: 'database',
  host: 'host',
  dialect: 'postgres',
  logging: true,
  pool: {
    max: 1,
    min: 1,
    acquire: 30000,
    idle: 10000
  }
}

const sequelize = new Sequelize(config);

sequelize.addHook('afterConnect', (client) => {
  //never fired
  client.on('notice', msg => {
    console.log('notice:', msg)
  })
  //never fired
  client.on('notification', msg => {
    console.log(msg.channel)
    console.log(msg.payload)
  })
});

await sequelize.query('any query that triggers a notice or notification');

What do you expect to happen?

I wanted to the notice or notification event called at least once

What is actually happening?

The events are never fired

No output

Additional context

Add any other context or screenshots about the feature request here.

Environment

• Sequelize version: sequelize@5.19.4
• Node.js version: v9.11.1
• Operating System: Ubuntu 16.04

Issue Template Checklist

How does this problem relate to dialects?

• I think this problem happens regardless of the dialect.
• I think this problem happens only for the following dialect(s): pg@7.12.1
• I don’t know, I was using PUT-YOUR-DIALECT-HERE, with connector library version XXX and database version XXX

Would you be willing to resolve this issue by submitting a Pull Request?

• Yes, I have the time and I know how to start.
• Yes, I have the time but I don’t know how to start, I would need guidance.
• No, I don’t have the time, although I believe I could do it if I had the time…
• No, I don’t have the time and I wouldn’t even know how to start.

[gv-beemining]

@gv-beemining Looking at it’s log output, looks like indeed your console.logs didn’t run. Are you sure they would work with the connector library directly (i.e. without sequelize)?

yes, i tried without sequelize, the library in this case is pg (example code):

 const client = new `Client()
    client.on('notice', msg => console.warn('notice:', msg))
    client.on('notification', msg => {
      console.log(msg.channel) 
      console.log(msg.payload)  
    })
    await client.connect();
    await client.query("DO language plpgsql $$ BEGIN RAISE NOTICE 'hello, world!'; END $$;");

in this snippet the console.log actually run

[gv-beemining]

repo query updated, tests passed, Thanks!