mapleFU commented on issue #39227:
URL: https://github.com/apache/arrow/issues/39227#issuecomment-2024597509
```c++
class BooleanDecoder : virtual public TypedDecoder<BooleanType> {
public:
using TypedDecoder<BooleanType>::Decode;
/// \brief Decode and bit-pack values into a buffer
///
/// \param[in] buffer destination for decoded values
/// This buffer will contain bit-packed values.
/// \param[in] max_values max values to decode.
/// \return The number of values decoded. Should be identical to
max_values except
/// at the end of the current data page.
virtual int Decode(uint8_t* buffer, int max_values) = 0;
};
```
RecordReader might read un-aligned batch here 🤔, maybe we need re-copying
the bitmap in record reader
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