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### Describe the bug, including details regarding any error messages, version, and platform. There are two issues with the asof join docs: 1. In the doc for the `on` parameter,...

hadrian-reppas

GH-46683: Add utf8_zfill kernel for sign-aware zero padding

13

### What does this PR do? Adds a new compute kernel `utf8_zero_fill` to Arrow Compute module. This kernel zero-pads UTF-8 strings while preserving leading signs. ### Why is it needed?...

iabhi4

[Python] Automatically support fsspec filesystem URIs

21

### Describe the enhancement requested I want to conveniently read parquet files from fsspec filesystems using schemes available in the [fsspec registry](https://filesystem-spec.readthedocs.io/en/latest/_modules/fsspec/registry.html) using URIs, without explicitly specifying the filesystem object....

kszucs

GH-42971: [C++] Parquet stream writer: Allow writing BYTE_ARRAY with converted type NONE

4

This allows to store binary data of arbitrary length in a parquet file, without having to wrongly declare it as UTF-8. Fixes the writer part of #42971 The reader part...

pulkomandy

GH-46818: [Docs][C++] Add missing method description in type.h

7

### Rationale for this change This is the sub issue #46808 Since EXTRACT_ALL is set YES in Doxygen, I expect that methods without comments will also be included in the...

hiroyuki-sato

GH-31387: [C++] Check nullability when validating fields on batches or struct arrays

3

### Rationale for this change Ensures schema validation catches null values in non-nullable fields, preventing silent errors when writing to formats like Parquet. ### What changes are included in this...

singh1203

[CI][C++][R] R Sanitizer for M1 fails on S3FileSystem

4

### Describe the bug, including details regarding any error messages, version, and platform. There seems to be a consistent sanitizer failure on the [test-r-m1-san](https://github.com/ursacomputing/crossbow/actions/runs/15746620340/job/44384034391) job on `S3FileSystem` with the following...

raulcd

GH-46791: [C++] Add `Status::OrElse`

4

### Rationale for this change In https://github.com/apache/arrow/pull/46711#discussion_r2139246309 it was mentioned that the macro `RETURN_NOT_OK_ELSE` is confusing and can easily be misunderstood. We would like a better way to conditionally chain...

pitrou

[C++] Add tests for HalfFloatScalar

1

### Describe the enhancement requested We have this long-standing TODO in `scalar_test.cc` that we should be able to address now that we have better float16 support in the library: https://github.com/apache/arrow/blob/85b4e6d0af00f795a4530896d5c3779f2e95ccea/cpp/src/arrow/scalar_test.cc#L1174...

pitrou

GH-45290: [Docs][Release] Change show_version_warning_banner substitution

2

### Rationale for this change Stable and dev docs are not correctly updated and need manual intervention due to the [upstream change](https://github.com/pydata/pydata-sphinx-theme/pull/2049) in version warning banner. ### What changes are...

AlenkaF