Periecle opened a new pull request, #49964:
URL: https://github.com/apache/arrow/pull/49964
### Rationale for this change
`pyarrow.compute.equal` fails for `pa.binary_view()` arrays because C++
compute has no registered comparison kernel for `(binary_view, binary_view)`.
This fixes that missing kernel path and also enables the same comparisons
for `utf8_view`.
### What changes are included in this PR?
This adds comparison kernel support for `binary_view` and `utf8_view`.
The following functions now work for same-type inputs:
- `equal`
- `not_equal`
- `greater`
- `greater_equal`
- `less`
- `less_equal`
### Are these changes tested?
Added C++ tests covering:
- inline and out-of-line values
- nulls
- sliced arrays
- array-array comparisons
- array-scalar and scalar-array comparisons
- all six comparison functions
Added Python regression tests for `pa.binary_view()` and
`pa.string_view()`.
Verified the same cases fail before this patch at `ga0d2885b1` with
`ArrowNotImplementedError: no kernel matching input types`.
### Are there any user-facing changes?
`pyarrow.compute` comparison functions now work for `pa.binary_view()` and
`pa.string_view()` arrays where they previously failed with a missing kernel
error.
Addresses: GH-46856
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