**** CubicPower OpenStack Study ****
def upgrade(migrate_engine):
actions_events = utils.get_table(migrate_engine, 'instance_actions_events')
host = Column('host', String(255))
details = Column('details', Text)
actions_events.create_column(host)
actions_events.create_column(details)
shadow_actions_events = utils.get_table(migrate_engine,
api._SHADOW_TABLE_PREFIX + 'instance_actions_events')
shadow_actions_events.create_column(host.copy())
shadow_actions_events.create_column(details.copy())
**** CubicPower OpenStack Study ****
def downgrade(migrate_engine):
actions_events = utils.get_table(migrate_engine, 'instance_actions_events')
actions_events.drop_column('host')
actions_events.drop_column('details')
shadow_actions_events = utils.get_table(migrate_engine,
api._SHADOW_TABLE_PREFIX + 'instance_actions_events')
shadow_actions_events.drop_column('host')
shadow_actions_events.drop_column('details')