Sorry, I must not have made it clear.

I mean, each time the main script is run, I only want one instance of the database connection. This is created in TArtLib ($TArtLib::dbh).

I want TArt::Editor to be able to use $TArtLib::dbh, so that TArt::Editor doesn't need to make a new DB connection. Both TArtLib and TArt::Editor will/should always be used in package main.