Website: Add blog post for 24.0.0

_posts/2026-04-21-24.0.0-release.md

@@ -0,0 +1,213 @@
+---
+layout: post
+title: "Apache Arrow 24.0.0 Release"
+date: "2026-04-21 00:00:00"
+author: pmc
+categories: [release]
+---
+<!--
+{% comment %}
+Licensed to the Apache Software Foundation (ASF) under one or more
+contributor license agreements.  See the NOTICE file distributed with
+this work for additional information regarding copyright ownership.
+The ASF licenses this file to you under the Apache License, Version 2.0
+(the "License"); you may not use this file except in compliance with
+the License.  You may obtain a copy of the License at
+
+http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+{% endcomment %}
+-->
+
+The Apache Arrow team is pleased to announce the 24.0.0 release. This release
+covers over 3 months of development work and includes [**259 resolved
+issues**][1] on [**325 distinct commits**][2] from [**57 distinct
+contributors**][2]. See the [Install Page](https://arrow.apache.org/install/) to
+learn how to get the libraries for your platform.
+
+The release notes below are not exhaustive and only expose selected highlights
+of the release. Many other bugfixes and improvements have been made: we refer
+you to the [complete changelog][3].
+
+## Community
+
+We recently published our [Community Highlights for 2025](https://arrow.apache.org/blog/2026/03/19/arrow-2025-highlights/), check those out.
+
+Thanks everyone for your contributions and participation in the project!
+
+## Format Notes
+
+We have written a project-wide [Security Model](https://arrow.apache.org/docs/dev/format/Security.html)
+outlining what users should expect when dealing with Arrow data, especially coming
+from untrusted sources [GH-48868](https://github.com/apache/arrow/issues/48868).
+
+## Arrow Flight RPC Notes
+
+The ODBC driver is still a work-in-progress. The driver now builds on Linux, but currently no builds are distributed (for any platform) ([GH-49463](https://github.com/apache/arrow/issues/49463)).
+
+In C++, we have refactored serialization/deserialization to make low-level functionality accessible for advanced usage ([GH-49548](https://github.com/apache/arrow/issues/49548)).
+
+## C++ Notes
+
+In addition to the aforementioned project-wide Security Model, we have written
+a specific [Security Model for Arrow C++](https://arrow.apache.org/docs/dev/cpp/security.html)
+covering more concrete topics such as API usage and parameter validity [GH-49274](https://github.com/apache/arrow/issues/49274).
+
+### Compute
+
+### Extension Types
+
+The canonical type [VariableShapeTensor](https://arrow.apache.org/docs/format/CanonicalExtensions.html#variable-shape-tensor)
+was finally implemented [GH-38007](https://github.com/apache/arrow/issues/38007).
+
+### Parquet
+
+**Breaking change:** The Arrow extension type name for Parquet Variant columns
+used to be `parquet.variant` but has been changed to `arrow.parquet.variant` [GH-49081](https://github.com/apache/arrow/issues/49081).
+
+While Parquet C++ could only read unencrypted bloom filters, it now supports
+reading encrypted bloom filters as well [GH-48334](https://github.com/apache/arrow/issues/48334). In addition, it can also
+write bloom filters, though only unencrypted [GH-34785](https://github.com/apache/arrow/issues/34785).
+
+An ambitious rewrite of the bit-unpacking utilities and optimizations has led to
+significant performance improvements on reading some Parquet columns, up to 50%
+faster in some cases [GH-48277](https://github.com/apache/arrow/issues/48277). This rewrite is described in more detail
+in an [accompanying blog post](https://medium.com/@AntoineProuvost/faster-reads-for-apache-parquet-improving-integer-unpacking-f6e21ce49a85).
+
+The performance of reading DELTA_BINARY_PACKED-encoded integers has been improved
+in some favorable cases [GH-49266](https://github.com/apache/arrow/issues/49266).
+
+### Miscellaneous C++ changes
+
+We have migrated to C++20 `std::span`, removing our home-grown implementation
+in `arrow::util::span` [GH-48588](https://github.com/apache/arrow/issues/48588).
+
+A bunch of previously deprecated APIs have been removed [GH-49356](https://github.com/apache/arrow/issues/49356).
+
+## Linux Packaging Notes
+
+Added support for Ubuntu 26.04, the next LTS [GH-49341](https://github.com/apache/arrow/issues/49341)
+
+## MATLAB Notes
+
+No major notes for this release on MATLAB.
+
+
+## Python Notes
+
+## Compatibility notes
+
+* `pyarrow.gandiva` is deprecated and will be removed in a future version [GH-49227](https://github.com/apache/arrow/issues/49227)
+
+## New features
+
+* Type annotations work is starting to be included ([GH-49102](https://github.com/apache/arrow/issues/49102) and
+  [GH-49452](https://github.com/apache/arrow/issues/49452))
+* Basic arithmetic on arrays and scalars is now supported [GH-32007](https://github.com/apache/arrow/issues/32007)
+* Options to control writing of Parquet Bloom filters are added to `parquet.write_table` [GH-49376](https://github.com/apache/arrow/issues/49376)
+* OpenTelemetry is enabled in PyArrow wheels [GH-49382](https://github.com/apache/arrow/issues/49382)
+* AzureFileSystem is now included in the Windows wheels [GH-44655](https://github.com/apache/arrow/issues/44655)
+
+## Other improvements
+
+* Scikit-build-core is now used as the PyArrow build system [GH-36411](https://github.com/apache/arrow/issues/36411)
+* `UUID` objects are now inferred automatically in `pa.scalar()` and `pa.array()` without the need to
+  specify the type explicitly [GH-48241](https://github.com/apache/arrow/issues/48241)
+* Constructing an extension array via `pa.array()` from a list of extension-type scalars is now supported
+  [GH-48470](https://github.com/apache/arrow/issues/48470)
+* There have been some improvements in the documentation ([GH-49278](https://github.com/apache/arrow/issues/49278),
+  [GH-49269](https://github.com/apache/arrow/issues/49269) and [GH-28859](https://github.com/apache/arrow/issues/28859))
+* CSV and JSON options have improved repr/str methods [GH-47389](https://github.com/apache/arrow/issues/47389)
+
+## Relevant bug fixes
+
+* `SparseCOOTensor.__repr__` missing f-string prefix is now fixed [GH-49108](https://github.com/apache/arrow/issues/49108)
+* Pickling `SubTreeFileSystem(base_path, AzureFileSystem(...))` is fixed [GH-49078](https://github.com/apache/arrow/issues/49078)
+* Casting from `StringArray` to pandas 3.* when element is `None` is fixed [GH-49002](https://github.com/apache/arrow/issues/49002)
+* Dictionary key order is now preserved when inferring struct type [GH-40053](https://github.com/apache/arrow/issues/40053)
+* Duplicate csv header when table batches start with empty is now fixed [GH-36889](https://github.com/apache/arrow/issues/36889)
+
+## R Notes
+
+### New Features
+
+* A number of new `dplyr` bindings [GH-49533](https://github.com/apache/arrow/issues/49533), [GH-49256](https://github.com/apache/arrow/issues/49256), [GH-49535](https://github.com/apache/arrow/issues/49535) and [GH-49534](https://github.com/apache/arrow/issues/49534)
+
+
+### Compatibility notes
+
+* Arrow no longer builds with GCS enabled on CRAN to avoid failures in their build systems. If you would like a full-featured build of Arrow, we recommend installing from R-universe; see [the Using cloud storage article in the docs](https://arrow.apache.org/docs/r/articles/fs.html) for more information. [GH-49067](https://github.com/apache/arrow/issues/49067) 
+
+
+### Relevant bug fixes
+
+* `to_arrow()` now retains grouping [GH-40640](https://github.com/apache/arrow/issues/40640)
+
+## Ruby and C GLib Notes
+
+* Fixed GC related problems.
+* `GArrowListArray`: Added support for returning offset buffer.
+* `GArrowLargeListArray`: Added support for returning offset buffer.
+* `GArrowUnionArray`: Added support for returning fields.
+* Deprecated Feather features.
+
+### Ruby
+
+We've added pure Ruby Apache Arrow writer implementation to the
+`red-arrow-format` gem.
+
+We've marked pure Ruby Apache Arrow reader implementation in the
+`red-arrow-format`gem as stable because it passes integration tests
+with other implementations. But it still has some missing features.
+
+The `red-arrow` gem:
+* Add support for converting to raw Ruby objects of the following arrays:
+  * `Arrow::LargeBinaryArray`
+  * `Arrow::LargeUTF8Array`
+  * `Arrow::LargeListArray`
+  * `Arrow::FixedSizeListArray`
+  * `Arrow::DurationArray`
+  * `Arrow::DictionaryArray` with `Arrow::LargeBinaryArray` or
+    `Arrow::LargeUTF8Array`
+
+### C GLib
+
+No C GLib only notes.
+
+
+## Java, JavaScript, Go, .NET, Swift and Rust Notes
+
+The Java, JavaScript, Go, .NET, Swift and Rust projects have moved to separate
+repositories outside the main Arrow [monorepo](https://github.com/apache/arrow).
+
+- For notes on the latest release of the [Java
+implementation](https://github.com/apache/arrow-java), see the latest [Arrow
+Java changelog][7].
+- For notes on the latest release of the [JavaScript
+implementation](https://github.com/apache/arrow-js), see the latest [Arrow
+JavaScript changelog][8].
+- For notes on the latest release of the [Rust
+  implementation](https://github.com/apache/arrow-rs) see the latest [Arrow Rust
+  changelog][5].
+- For notes on the latest release of the [Go
+implementation](https://github.com/apache/arrow-go), see the latest [Arrow Go
+changelog][6].
+- For notes on the latest release of the [.NET
+implementation](https://github.com/apache/arrow-dotnet), see the latest [Arrow  .NET changelog][9].
+- For notes on the latest release of the [Swift implementation](https://github.com/apache/arrow-swift), see the latest [Arrow Swift changelog][10].
+
+[1]: https://github.com/apache/arrow/milestone/72?closed=1
+[2]: {{ site.baseurl }}/release/24.0.0.html#contributors
+[3]: {{ site.baseurl }}/release/24.0.0.html#changelog
+[4]: {{ site.baseurl }}/docs/r/news/
+[5]: <https://github.com/apache/arrow-rs/blob/main/CHANGELOG.md>
+[6]: <https://github.com/apache/arrow-go/releases>
+[7]: <https://github.com/apache/arrow-java/releases>
+[8]: <https://github.com/apache/arrow-js/releases>
+[9]: <https://github.com/apache/arrow-dotnet/releases>
+[10]: <https://github.com/apache/arrow-swift/releases>