Method getStripeStatistics

c++/src/Reader.cc:837–867

  }

  std::unique_ptr<StripeStatistics> ReaderImpl::getStripeStatistics(uint64_t stripeIndex,
                                                                    bool includeRowIndex) const {
    if (!isMetadataLoaded_) {
      readMetadata();
    }
    if (contents_->metadata == nullptr) {
      throw std::logic_error("No stripe statistics in file");
    }

    proto::StripeInformation currentStripeInfo = footer_->stripes(static_cast<int>(stripeIndex));
    proto::StripeFooter currentStripeFooter = getStripeFooter(currentStripeInfo, *contents_.get());

    const Timezone& writerTZ = currentStripeFooter.has_writer_timezone()
                                   ? getTimezoneByName(currentStripeFooter.writer_timezone())
                                   : getLocalTimezone();
    StatContext statContext(hasCorrectStatistics(), &writerTZ);

    if (!includeRowIndex) {
      return std::make_unique<StripeStatisticsImpl>(
          contents_->metadata->stripe_stats(static_cast<int>(stripeIndex)), statContext);
    }

    size_t num_cols = static_cast<size_t>(
        contents_->metadata->stripe_stats(static_cast<int>(stripeIndex)).col_stats_size());
    std::vector<std::vector<proto::ColumnStatistics>> indexStats(num_cols);

    getRowIndexStatistics(currentStripeInfo, stripeIndex, currentStripeFooter, &indexStats);

    return std::make_unique<StripeStatisticsWithRowGroupIndexImpl>(
        contents_->metadata->stripe_stats(static_cast<int>(stripeIndex)), indexStats, statContext);
  }

  std::unique_ptr<Statistics> ReaderImpl::getStatistics() const {
    StatContext statContext(hasCorrectStatistics());