presto-tpch/src/main/java/io/prestosql/plugin/tpch/statistics/TableStatisticsDataRepository.java/TableStatisticsDataRepository/load
class TableStatisticsDataRepository:    public Optional<TableStatisticsData> load(String schemaName, TpchTable<?> table, Optional<TpchColumn<?>> partitionColumn, Optional<String> partitionValue)
    {
        String filename = tableStatisticsDataFilename(table, partitionColumn, partitionValue);
        String resourcePath = "/tpch/statistics/" + schemaName + "/" + filename + ".json";
        URL resource = getClass().getResource(resourcePath);
        if (resource == null) {
            return Optional.empty();
        }
        try {
            return Optional.of(objectMapper.readValue(resource, TableStatisticsData.class));
        }
        catch (Exception e) {
            throw new RuntimeException(format("Failed to parse stats from resource [%s]", resourcePath), e);
        }
    }