public HivePartitionStats getTableStatistics(String dbName, String tblName) {
        return get(tableStatsCache, DatabaseTableName.of(dbName, tblName));
    }
@Test
    public void testGetTableStatistics() {
        CachingHiveMetastore cachingHiveMetastore = new CachingHiveMetastore(
                metastore, executor, expireAfterWriteSec, refreshAfterWriteSec, 1000, false);
        HivePartitionStats statistics = cachingHiveMetastore.getTableStatistics("db1", "table1");
        HiveCommonStats commonStats = statistics.getCommonStats();
        Assert.assertEquals(50, commonStats.getRowNums());
        Assert.assertEquals(100, commonStats.getTotalFileBytes());
        HiveColumnStats columnStatistics = statistics.getColumnStats().get("col1");
        Assert.assertEquals(0, columnStatistics.getTotalSizeBytes());
        Assert.assertEquals(1, columnStatistics.getNumNulls());
        Assert.assertEquals(2, columnStatistics.getNdv());
    }