Function Decode

cpp/src/arrow/compute/row/row_encoder_internal.h:267–270

  void EncodeNull(uint8_t** encoded_bytes) override {}

  Result<std::shared_ptr<ArrayData>> Decode(uint8_t** encoded_bytes, int32_t length,
                                            MemoryPool* pool) override {
    return ArrayData::Make(null(), length, {NULLPTR}, length);
  }
};

/// RowEncoder encodes ExecSpan to a variable length byte sequence