Function VerifyStringAndNumber_FixedWidth

cpp/src/arrow/acero/tpch_node_test.cc:127–144

Verifies that each row is the string "prefix" followed by a number. If numbers is not EMPTY, it also checks that the number following the prefix is equal to the corresponding row in numbers. Some TPC-H data is padded to 9 zeros, which this function can optionally verify as well. This string function verifies fixed width columns.

// corresponding row in numbers. Some TPC-H data is padded to 9 zeros, which this function
// can optionally verify as well. This string function verifies fixed width columns.
void VerifyStringAndNumber_FixedWidth(const Datum& strings, const Datum& numbers,
                                      int byte_width, std::string_view prefix,
                                      bool verify_padding = true) {
  int64_t length = strings.length();
  const char* str = reinterpret_cast<const char*>(strings.array()->buffers[1]->data());

  const int32_t* nums = nullptr;
  if (numbers.kind() != Datum::NONE) {
    ASSERT_EQ(length, numbers.length());
    nums = reinterpret_cast<const int32_t*>(numbers.array()->buffers[1]->data());
  }

  for (int64_t i = 0; i < length; i++) {
    const char* row = str + i * byte_width;
    std::string_view view(row, byte_width);
    VerifyStringAndNumber_Single(view, prefix, i, nums, verify_padding);
  }
}

// Same as above but for variable length columns
void VerifyStringAndNumber_Varlen(const Datum& strings, const Datum& numbers,