code: func Open(dsn string) (*Adapter, error) {
  	var err error
  
  	adapter := &Adapter{
  		Adapter: &sql.Adapter{
  			Config: &sql.Config{
  				Placeholder:   "?",
  				EscapeChar:    "`",
  				IncrementFunc: incrementFunc,
  				ErrorFunc:     errorFunc,
  			},
  		},
  	}
  	adapter.DB, err = db.Open("mysql", dsn)
  
  	return adapter, err
  }
docs: // Open mysql connection using dsn.