OpenStack Study: 5a875d0e5c_ryu.py

**** CubicPower OpenStack Study ****

def upgrade(active_plugins=None, options=None):

    if not migration.should_run(active_plugins, migration_for_plugins):

        return

    op.create_table(

        'tunnelkeys',

        sa.Column('network_id', sa.String(length=36), nullable=False),

        sa.Column('tunnel_key', sa.Integer(), autoincrement=False,

                  nullable=False),

        sa.ForeignKeyConstraint(['network_id'], ['networks.id'],

                                ondelete='CASCADE'),

        sa.PrimaryKeyConstraint('tunnel_key')

    )

    op.create_table(

        'tunnelkeylasts',

        sa.Column('last_key', sa.Integer(), autoincrement=False,

                  nullable=False),

        sa.PrimaryKeyConstraint('last_key')

    )

**** CubicPower OpenStack Study ****

def downgrade(active_plugins=None, options=None):

    if not migration.should_run(active_plugins, migration_for_plugins):

        return

    op.drop_table('tunnelkeylasts')

    op.drop_table('tunnelkeys')