mapleFU commented on issue #15058:
URL: https://github.com/apache/arrow/issues/15058#issuecomment-1687558148
I found a `UUID` in `src/arrow/testing/extension_type.h`
```c++
class ARROW_TESTING_EXPORT UuidArray : public ExtensionArray {
public:
using ExtensionArray::ExtensionArray;
};
class ARROW_TESTING_EXPORT UuidType : public ExtensionType {
public:
UuidType() : ExtensionType(fixed_size_binary(16)) {}
std::string extension_name() const override { return "uuid"; }
bool ExtensionEquals(const ExtensionType& other) const override;
std::shared_ptr<Array> MakeArray(std::shared_ptr<ArrayData> data) const
override;
Result<std::shared_ptr<DataType>> Deserialize(
std::shared_ptr<DataType> storage_type,
const std::string& serialized) const override;
std::string Serialize() const override { return "uuid-serialized"; }
};
```
Maybe we just need to draft and make it available?
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