def upgrade(migrate_engine):
    meta = MetaData()
    meta.bind = migrate_engine
    (define_images_table,) = from_migration_import(
        '001_add_images_table', ['define_images_table'])
    (define_image_properties_table,) = from_migration_import(
        '002_add_image_properties_table', ['define_image_properties_table'])

    conn = migrate_engine.connect()
    images = define_images_table(meta)
    image_properties = define_image_properties_table(meta)

    # Steps to take, in this order:
    # 1) Move the existing type column from Image into
    #    ImageProperty for all image records that have a non-NULL
    #    type column
    # 2) Drop the type column in images
    # 3) Add the new columns to images

    # The below wackiness correlates to the following ANSI SQL:
    #   SELECT images.* FROM images
    #   LEFT JOIN image_properties
    #   ON images.id = image_properties.image_id
    #   AND image_properties.key = 'type'
    #   WHERE image_properties.image_id IS NULL
    #   AND images.type IS NOT NULL
    #
    # which returns all the images that have a type set
    # but that DO NOT yet have an image_property record
    # with key of type.
    sel = select([images], from_obj=[
        images.outerjoin(image_properties,
                         and_(images.c.id == image_properties.c.image_id,
                              image_properties.c.key == 'type'))]).where(
            and_(image_properties.c.image_id == None,
                 images.c.type is None))
    image_records = conn.execute(sel).fetchall()
    property_insert = image_properties.insert()
    for record in image_records:
        conn.execute(property_insert,
                     image_id=record.id,
                     key='type',
                     created_at=record.created_at,
                     deleted=False,
                     value=record.type)

    disk_format = Column('disk_format', String(20))
    disk_format.create(images)
    container_format = Column('container_format', String(20))
    container_format.create(images)

    images.columns['type'].drop()
    conn.close()
dataset/ETHPy150Open rcbops/glance-buildpackage/glance/registry/db/migrate_repo/versions/003_add_disk_format.py/upgrade/operator `!=` -> `is`