Method VerifyParquetStats

cpp/src/parquet/statistics_test.cc:989–1009

  }

  void VerifyParquetStats() {
    ASSERT_OK_AND_ASSIGN(auto pbuffer, parquet_sink_->Finish());

    // Create a ParquetReader instance
    std::unique_ptr<parquet::ParquetFileReader> parquet_reader =
        parquet::ParquetFileReader::Open(
            std::make_shared<::arrow::io::BufferReader>(pbuffer));

    // Get the File MetaData
    std::shared_ptr<parquet::FileMetaData> file_metadata = parquet_reader->metadata();
    std::shared_ptr<parquet::RowGroupMetaData> rg_metadata = file_metadata->RowGroup(0);
    for (int i = 0; i < static_cast<int>(fields_.size()); i++) {
      ARROW_SCOPED_TRACE("Statistics for field #", i);
      std::shared_ptr<parquet::ColumnChunkMetaData> cc_metadata =
          rg_metadata->ColumnChunk(i);
      EXPECT_EQ(stats_[i].min(), cc_metadata->statistics()->EncodeMin());
      EXPECT_EQ(stats_[i].max(), cc_metadata->statistics()->EncodeMax());
      EXPECT_EQ(stats_[i].is_max_value_exact, std::make_optional(true));
      EXPECT_EQ(stats_[i].is_min_value_exact, std::make_optional(true));
    }
  }

 protected:
  std::vector<c_type> values_;