How to use the apsw.CorruptError function in apsw

< 60 * 60 * 24 * 31): # last check more than 1 month ago
        if options.force or options.renumber_inodes:
            log.info('File system seems clean, checking anyway.')
        else:
            log.info('File system is marked as clean. Use --force to force checking.')
            return
    
    # If using local metadata, check consistency
    if db:
        log.info('Checking DB integrity...')
        try:
            # get_list may raise CorruptError itself
            res = db.get_list('PRAGMA integrity_check(20)')
            if res[0][0] != u'ok':
                log.error('\n'.join(x[0] for x in res ))
                raise apsw.CorruptError()
        except apsw.CorruptError:
            raise QuietError('Local metadata is corrupted. Remove or repair the following '
                             'files manually and re-run fsck:\n'
                             + cachepath + '.db (corrupted)\n'
                             + cachepath + '.param (intact)')
    else:
        def do_read(fh):
            tmpfh = tempfile.TemporaryFile()
            stream_read_bz2(fh, tmpfh)
            return tmpfh
        log.info('Downloading and decompressing metadata...')
        tmpfh = bucket.perform_read(do_read, "s3ql_metadata") 
        os.close(os.open(cachepath + '.db.tmp', os.O_RDWR | os.O_CREAT | os.O_TRUNC,
                         stat.S_IRUSR | stat.S_IWUSR)) 
        db = Connection(cachepath + '.db.tmp', fast_mode=True)
        log.info("Reading metadata...")

log.warning('You should delete this directory once you are sure that '
                    'everything is in order.')
        os.rename(cachepath + '-cache', bak_name)
    elif outdated_cachedir:
        log.info("Flushing outdated local cache...")
        shutil.rmtree(cachepath + '-cache')

    # If using local metadata, check consistency
    if db:
        log.info('Checking DB integrity...')
        try:
            # get_list may raise CorruptError itself
            res = db.get_list('PRAGMA integrity_check(20)')
            if res[0][0] != 'ok':
                log.error('\n'.join(x[0] for x in res))
                raise apsw.CorruptError()
        except apsw.CorruptError:
            raise QuietError('Local metadata is corrupted. Remove or repair the following '
                             'files manually and re-run fsck:\n'
                             + cachepath + '.db (corrupted)\n'
                             + cachepath + '.param (intact)', exitcode=43)
    else:
        db = download_metadata(backend, cachepath + '.db')

    # We only read cache files if the filesystem was not
    # unmounted cleanly. On a clean unmount, the cache files can
    # not be dirty.
    check_cache = param['needs_fsck']
    if check_cache and options.keep_cache:
        check_cache = 'keep'

    # Increase metadata sequence no