text: # vim: tabstop=4 shiftwidth=4 softtabstop=4
  
  # Copyright 2011 OpenStack LLC.
  # All Rights Reserved.
  #
  #    Licensed under the Apache License, Version 2.0 (the "License"); you may
  #    not use this file except in compliance with the License. You may obtain
  #    a copy of the License at
  #
  #         http://www.apache.org/licenses/LICENSE-2.0
  #
  #    Unless required by applicable law or agreed to in writing, software
  #    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
  #    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
  #    License for the specific language governing permissions and limitations
  #    under the License.
  
  from sqlalchemy import Boolean, Column, DateTime, Integer
  from sqlalchemy import MetaData, String, Table
  from nova import log as logging
  
  LOG = logging.getLogger(__name__)
  
  
  def upgrade(migrate_engine):
      meta = MetaData()
      meta.bind = migrate_engine
  
      #
      # New Tables
      #
      s3_images = Table('s3_images', meta,
                      Column('created_at',
                                        DateTime(timezone=False)),
                      Column('updated_at',
                                        DateTime(timezone=False)),
                      Column('deleted_at',
                                        DateTime(timezone=False)),
                      Column('deleted',
                             Boolean(create_constraint=True, name=None)),
                      Column('id', Integer(),
                                        primary_key=True,
                                        nullable=False,
                                        autoincrement=True),
                      Column('uuid', String(36),
                                        nullable=False))
      try:
          s3_images.create()
      except Exception:
          LOG.exception("Exception while creating table 's3_images'")
          meta.drop_all(tables=[s3_images])
          raise
  
  
  def downgrade(migrate_engine):
      meta = MetaData()
      meta.bind = migrate_engine
  
      s3_images = Table('s3_images', meta, autoload=True)
      s3_images.drop()
  