Working with connection in pgsql, when should PQreset be called?

Question

SQL

I create a connection using the PQconnectdb function.
Let's assume that our Internet fell for a while, and I could not complete the request, do I need to call PQreset?
Or there, in general, the server fell off and rebooted, and again I saw this while trying to make some kind of request.
Is it necessary to call PQreset here?
So far, I've come up with - sometimes do PQping and if it falls off, then do PQreset.