2e541a1dcfed_task_duration.py 文件源码

def upgrade():
    # use batch_alter_table to support SQLite workaround
    with op.batch_alter_table("task_instance") as batch_op:
        batch_op.alter_column('duration',
                              existing_type=mysql.INTEGER(display_width=11),
                              type_=sa.Float(),
                              existing_nullable=True)