To use the native API, use the Ruby9i module directly. All classes are in the “Ruby9i” namespace.

require 'Ruby9i'
db = Ruby9i::Database.new('databasename', 'username', 'password')
# ...
   

If you prefer the DBI API, use a driver name of “Ruby9i” in the call to DBI#connect.

require 'dbi'
db = DBI.connect('dbi:Ruby9i:databasename', 'username', 'password')
# ...