How to set application name in golang lib/pq postgresql driver?

I'm writing a golang application and using the golang postgres driver - https://github.com/lib/pq/

I use a connection string like this

'name:pass@host:port/dbname'

I try to add aplication_name param in conn string, but this doesn't work

'name:pass@host:port/dbname?application_name=myapp'

Is it possible to set the application name from golang? (standard way)

Even though it's not mentioned in the documentation, if you look at the lib/pq source code you will find that application_name is supported.

This style connection works as desired:

connstring := fmt.Sprintf("user='%s' password='%s' dbname='%s' host='%s' application_name='%s'", user, password, dbname, host, application_name)
db, err := sql.Open("postgres", connstring)

If you look to the documentation a application_name option is not suuported. Maybe you could use:

> fallback_application_name - An application_name to fall back to if
> one isn't provided.

name:pass@host:port/dbname?fallback_application_name=myapp

You can set the application name one of two ways.

// Application name as space-separated list of options.
sql.Open("postgres", "user=myuser password=mypass host=localhost port=5432 dbname=mydb sslmode=disable application_name=myapp")

or

// Application name as query param.
sql.Open("postgres", "postgres://myuser:mypass@localhost:5432/mydb?sslmode=disable&application_name=myapp")