mapleFU opened a new issue, #38320:
URL: https://github.com/apache/arrow/issues/38320
### Describe the enhancement requested
```C++
class PARQUET_EXPORT FileReader {
public:
/// Factory function to create a FileReader from a ParquetFileReader and
properties
static ::arrow::Status Make(::arrow::MemoryPool* pool,
std::unique_ptr<ParquetFileReader> reader,
const ArrowReaderProperties& properties,
std::unique_ptr<FileReader>* out);
/// Factory function to create a FileReader from a ParquetFileReader
static ::arrow::Status Make(::arrow::MemoryPool* pool,
std::unique_ptr<ParquetFileReader> reader,
std::unique_ptr<FileReader>* out);
```
Here:
1. `ParquetFileReader` uses it's memory using pool in `ReaderProperties`
2. `FileReader` has a `MemoryPool` for building arrow.
So this distinct the parquet arrow reader to possible two memory pool. Is
this expected?
### Component(s)
C++, Parquet
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