old_contents: # Copyright (c) 2013 Hewlett-Packard Development Company, L.P.
  # 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 Column
  from sqlalchemy import MetaData
  from sqlalchemy import Table
  from sqlalchemy import Text
  
  
  def upgrade(migrate_engine):
      meta = MetaData()
      meta.bind = migrate_engine
  
      # Add a new column metrics to save metrics info for compute nodes
      compute_nodes = Table('compute_nodes', meta, autoload=True)
      shadow_compute_nodes = Table('shadow_compute_nodes', meta, autoload=True)
  
      extra_resources = Column('extra_resources', Text, nullable=True)
      shadow_extra_resources = Column('extra_resources', Text, nullable=True)
      compute_nodes.create_column(extra_resources)
      shadow_compute_nodes.create_column(shadow_extra_resources)
  
new_contents: # Copyright (c) 2013 Hewlett-Packard Development Company, L.P.
  # 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 Column
  from sqlalchemy import MetaData
  from sqlalchemy import Table
  from sqlalchemy import Text
  
  
  def upgrade(migrate_engine):
      meta = MetaData()
      meta.bind = migrate_engine
  
      # Add a new column extra_resources to save extra_resources info for
      # compute nodes
      compute_nodes = Table('compute_nodes', meta, autoload=True)
      shadow_compute_nodes = Table('shadow_compute_nodes', meta, autoload=True)
  
      extra_resources = Column('extra_resources', Text, nullable=True)
      shadow_extra_resources = Column('extra_resources', Text, nullable=True)
      compute_nodes.create_column(extra_resources)
      shadow_compute_nodes.create_column(shadow_extra_resources)
  
subject: Update wrong comment