Function CountModifiedComments

cpp/src/arrow/acero/tpch_node_test.cc:326–344

For the S_COMMENT column, some of the columns must be modified to contain "Customer...Complaints" or "Customer...Recommends". This function counts the number of good and bad comments.

// "Customer...Complaints" or "Customer...Recommends". This function counts the number of
// good and bad comments.
void CountModifiedComments(const Datum& d, int* good_count, int* bad_count) {
  int64_t length = d.length();
  const int32_t* offsets =
      reinterpret_cast<const int32_t*>(d.array()->buffers[1]->data());
  const char* str = reinterpret_cast<const char*>(d.array()->buffers[2]->data());
  for (int64_t i = 0; i < length; i++) {
    const char* row = str + offsets[i];
    int32_t row_length = offsets[i + 1] - offsets[i];
    std::string_view view(row, row_length);
    bool customer = view.find("Customer") != std::string_view::npos;
    bool recommends = view.find("Recommends") != std::string_view::npos;
    bool complaints = view.find("Complaints") != std::string_view::npos;
    if (customer) {
      ASSERT_TRUE(recommends ^ complaints);
      if (recommends) *good_count += 1;
      if (complaints) *bad_count += 1;
    }
  }
}

void VerifySupplier(const std::vector<ExecBatch>& batches,
                    double scale_factor = kDefaultScaleFactor) {