class DuckDB::Database

def connect

end
con.query('CREATE TABLE users (id INTEGER, name VARCHAR(30))')
db.connect do |con|

con = db.connect # => DuckDB::Connection

db = DuckDB::Database.open

The method yields block and disconnects the database if block given

connects database. 
def connect
  conn = _connect
  return conn unless block_given?
  begin
    yield conn
  ensure
    conn.disconnect
  end
end