[C++][IPC][Tensor] Incorrect SparseTensorIndexCSF IPC format
- Dominant language
- C++
- Stars
- 17.1k
- Forks
- 4.3k
- Avg merge
- 3d 13h
- Merged PRs (30d)
- 88
Description
### Describe the bug, including details regarding any error messages, version, and platform.
In the following schema file, it is assumed that there is a single type for all `indptr` buffers and another single type for all `indices` buffers. However, in the C++ implementation, each `indptr` and `indices` buffer can have its own type.
**Schema files**
[https://github.com/apache/arrow/blob/d803afcc43f5d132506318fd9e162d33b2c3d4cd/format/SparseTensor.fbs#L160](https://github.com/apache/arrow/blob/d803afcc43f5d132506318fd9e162d33b2c3d4cd/format/SparseTensor.fbs#L160)
[https://github.com/apache/arrow/blob/d803afcc43f5d132506318fd9e162d33b2c3d4cd/format/SparseTensor.fbs#L179](https://github.com/apache/arrow/blob/d803afcc43f5d132506318fd9e162d33b2c3d4cd/format/SparseTensor.fbs#L179)
**C++ implementation**
Note that each tensor is associated with its own type:
[https://github.com/apache/arrow/blob/d803afcc43f5d132506318fd9e162d33b2c3d4cd/cpp/src/arrow/sparse\_tensor.h#L445-L447](https://github.com/apache/arrow/blob/d803afcc43f5d132506318fd9e162d33b2c3d4cd/cpp/src/arrow/sparse_tensor.h#L445-L447)
In the C++ IPC implementation, however, the type of the first `indices` and `indptr` buffer is generalized to all:
[https://github.com/apache/arrow/blob/d803afcc43f5d132506318fd9e162d33b2c3d4cd/cpp/src/arrow/ipc/metadata\_internal.cc#L1152-L1153](https://github.com/apache/arrow/blob/d803afcc43f5d132506318fd9e162d33b2c3d4cd/cpp/src/arrow/ipc/metadata_internal.cc#L1152-L1153)
[https://github.com/apache/arrow/blob/d803afcc43f5d132506318fd9e162d33b2c3d4cd/cpp/src/arrow/ipc/metadata\_internal.cc#L1158-L1159](https://github.com/apache/arrow/blob/d803afcc43f5d132506318fd9e162d33b2c3d4cd/cpp/src/arrow/ipc/metadata_internal.cc#L1158-L1159)
### Component(s)
C++, Documentation, Other
Contributor guide
Assessment
This issue has not been assessed yet.