Function appendMetadataInt32

bolt/vector/arrow/tests/ArrowBridgeSchemaTest.cpp:47–49

constexpr std::string_view kSparkVariantExtensionName = "spark.variant";

void appendMetadataInt32(std::string& metadata, int32_t value) {
  metadata.append(reinterpret_cast<const char*>(&value), sizeof(value));
}

std::string makeArrowMetadata(std::string_view key, std::string_view value) {
  std::string metadata;