Re: Psql meta-command conninfo+

The existing \conninfo command gets its values from libpq APIs.  You are 
changing all of this to make a server query, which is a totally 
different thing.  If we wanted to take a change like this, I don't think 
it should be reusing the \conninfo command.

But I don't really see the point of this.  The information you are 
querying is already available in various system views.  This proposal is 
just a shorthand for a collection of various random things some people 
like to see.  Like, by what reason is application name included as 
connection info?  Why not any other session settings?  What about 
long-term maintenance: By what logic should things be added to this?