https://github.com/apache/airflow/blob/main/airflow/cli/commands/task_command.py#L145
"""
        Schedule downstream tasks of this task instance.
        :meta: private
        """
        from sqlalchemy.exc import OperationalError
        from airflow.models.dagrun import DagRun
        try:
            
            dag_run = with_row_locks(
                session.query(DagRun).filter_by(
                    dag_id=self.dag_id,
                    run_id=self.run_id,
                ),
                session=session,
            ).one()
            task = self.task
            if TYPE_CHECKING:
                assert task.dag
            
            
            
            partial_dag = task.dag.partial_subset(
                task.downstream_task_ids,
                include_downstream=True,
                include_upstream=False,
                include_direct_upstream=True,
            )
            dag_run.dag = partial_dag