Create marker table if it doesn't exist.
        Use a separate connection since the transaction might have to be reset.

def create_marker_table(self):
        """
        Create marker table if it doesn't exist.
        Use a separate connection since the transaction might have to be reset.
        """
        connection = self.connect()
        try:
            connection.execute_non_query(
                """ CREATE TABLE {marker_table} (
                        id            BIGINT    NOT NULL IDENTITY(1,1),
                        update_id     VARCHAR(128)  NOT NULL,
                        target_table  VARCHAR(128),
                        inserted      DATETIME DEFAULT(GETDATE()),
                        PRIMARY KEY (update_id)
                    )
                """
                .format(marker_table=self.marker_table)
            )
        except _mssql.MSSQLDatabaseException as e:
            # Table already exists code
            if e.number == 2714:
                pass
            else:
                raise
        connection.close()