'Check that migrations don\'t cause downtime.
Schema migrations can be done online, allowing for rolling upgrades.'

def migrate_up(self, version, with_data=False):

    exceptions = [64]
    LIBERTY_START = 63
    if ((version >= LIBERTY_START) and (version not in exceptions)):
        banned = ['Table', 'Column']
    else:
        banned = None
    with BannedDBSchemaOperations(banned):
        super(HeatMigrationsCheckers, self).migrate_up(version, with_data)
