def METHOD_NAME(self):
    """
    Establishes a connection to the Ingres server.
    Returns:
        HandlerStatusResponse
    """
    if self.is_connected:
        return self.connection
    conn_str = f"Driver={{Ingres}};Server={self.server};Database={self.database};UID={self.user};" \
               f"PWD={self.password};ServerType={self.servertype}"
    self.connection = pyodbc.METHOD_NAME(conn_str)
    self.is_connected = True
    return self.connection