List<Long> getTTLTimeBuckets(Model model) {
        final var ttl = model.isRecord() ?
            getConfigService().getRecordDataTTL() :
            getConfigService().getMetricsDataTTL();
        return LongStream
            .range(0, ttl)
            .mapToObj(it -> TimeBucket.getTimeBucket(System.currentTimeMillis() - TimeUnit.DAYS.toMillis(it), DownSampling.Day))
            .distinct()
            .collect(toList());
    }
Similar to {@link #getTablesForRead(String, long, long)}, but don't check the table existence.
oap-server/server-storage-plugin/storage-jdbc-hikaricp-plugin/src/main/java/org/apache/skywalking/oap/server/storage/plugin/jdbc/common/TableHelper.java