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  # Copyright 2011 OpenStack LLC.
  #
  #    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 MetaData
  
  
  def upgrade(migrate_engine):
      # Upgrade operations go here. Don't create your own engine;
      # bind migrate_engine to your metadata
      meta = MetaData()
      meta.bind = migrate_engine
      if migrate_engine.name == "mysql":
          migrate_engine.execute("ALTER TABLE agent_builds Engine=InnoDB")
          migrate_engine.execute("ALTER TABLE aggregate_hosts Engine=InnoDB")
          migrate_engine.execute("ALTER TABLE aggregate_metadata Engine=InnoDB")
          migrate_engine.execute("ALTER TABLE aggregates Engine=InnoDB")
          migrate_engine.execute(
              "ALTER TABLE block_device_mapping Engine=InnoDB")
          migrate_engine.execute("ALTER TABLE bw_usage_cache Engine=InnoDB")
          migrate_engine.execute("ALTER TABLE dns_domains Engine=InnoDB")
          migrate_engine.execute("ALTER TABLE instance_faults Engine=InnoDB")
          migrate_engine.execute(
              "ALTER TABLE instance_type_extra_specs Engine=InnoDB")
          migrate_engine.execute("ALTER TABLE provider_fw_rules Engine=InnoDB")
          migrate_engine.execute("ALTER TABLE quota_classes Engine=InnoDB")
          migrate_engine.execute("ALTER TABLE s3_images Engine=InnoDB")
          migrate_engine.execute("ALTER TABLE sm_backend_config Engine=InnoDB")
          migrate_engine.execute("ALTER TABLE sm_flavors Engine=InnoDB")
          migrate_engine.execute("ALTER TABLE sm_volume Engine=InnoDB")
          migrate_engine.execute(
              "ALTER TABLE virtual_storage_arrays Engine=InnoDB")
          migrate_engine.execute("ALTER TABLE volume_metadata Engine=InnoDB")
          migrate_engine.execute(
              "ALTER TABLE volume_type_extra_specs Engine=InnoDB")
          migrate_engine.execute("ALTER TABLE volume_types Engine=InnoDB")
  
  
  def downgrade(migrate_engine):
      pass
  
subject: make all mysql tables explicitly innodb