westonpace commented on a change in pull request #127:
URL: https://github.com/apache/arrow-site/pull/127#discussion_r678556014
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File path: _posts/2021-07-20-5.0.0-release.md
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+---
+layout: post
+title: "Apache Arrow 5.0.0 Release"
+date: "2020-07-16 00:00:00 -0600"
+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 %}
+-->
+
+<!--
+
+To use this template:
+
+* Update all "XX" values with the appropriate numbers (you can get the
resolved issues and contributors count from `_release/5.0.0.md`)
+* Fill in the various sections below. Note that the audience is the broader
user community, not Arrow developers, so please write clearly using terms they
will understand and care about. Delete any sections that don't have any content
(as in, there are no changes to announce)
+* Delete this introductory comment
+
+ -->
+
+
+The Apache Arrow team is pleased to announce the 5.0.0 release. This covers
+3 months of development work and includes **XX commits** from
+[**XX distinct contributors**][1] in 2 repositories. See the Install Page 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 changelogs for the [`apache/arrow`][2] and
+[`apache/arrow-rs`][3] repositories.
+
+## Community
+
+Since the 4.0.0 release, Daniël Heres, Kazuaki Ishizaki, Dominik Moritz, and
Weston Pace
+have been invited as committers to Arrow,
+and Benjamin Kietzman and David Li have joined the Project Management Committee
+(PMC). Thank you for all of your contributions!
+
+## Columnar Format Notes
+
+Official IANA Media types (MIME types) have been registered for Apache
+Arrow IPC protocol data, both [stream]({{ site.baseurl
}}/docs/format/Columnar.html#ipc-streaming-format)
+and [file]({{ site.baseurl }}/docs/format/Columnar.html#ipc-file-format)
variants:
+
+*
https://www.iana.org/assignments/media-types/application/vnd.apache.arrow.stream
+*
https://www.iana.org/assignments/media-types/application/vnd.apache.arrow.file
+
+We recommend `.arrow` as the IPC file format file extension and `.arrows` for
+the IPC streaming format file extension.
+
+## Arrow Flight RPC notes
+
+The Go implementation now supports custom metadata and middleware, and has
+been added to integration testing.
+
+In Python, some operations can now be interrupted via Control-C.
+
+## C++ notes
+
+`MakeArrayFromScalar` now works for fixed-size binary types (ARROW-13321).
+
+### Compute layer
+
+The following [compute functions]({{site.baseurl}}/docs/cpp/compute.html)
+were added:
+
+* aggregations: `index`
+
+* scalar arithmetic and math functions: `abs`, `abs_checked`, `acos`,
+ `acos_checked`, `asin`, `asin_checked`, `atan`, `atan2`, `ceil`, `cos`,
+ `cos_checked`, `floor`, `ln`, `ln_checked`, `log10`, `log10_checked`,
+ `log1p`, `log1p_checked`, `log2`, `log2_checked`, `negate`, `negate_checked`,
+ `sign`, `sin`, `sin_checked`, `tan`, `tan_checked`, `trunc`
+
+* scalar bitwise functions: `bit_wise_and`, `bit_wise_not`, `bit_wise_or`,
+ `bit_wise_xor`, `shift_left`, `shift_left_checked`, `shift_right`,
+ `shift_right_checked`
+
+* scalar string functions: `ascii_center`, `ascii_lpad`, `ascii_reverse`,
+ `ascii_rpad`, `binary_join`, `binary_join_element_wise`,
+ `binary_replace_slice`, `count_substring`, `count_substring_regex`,
+ `ends_with`, `find_substring`, `find_substring_regex`, `match_like`,
+ `split_pattern_regex`, `starts_with`, `utf8_center`, `utf8_lpad`,
+ `utf8_replace_slice`, `utf8_rpad`, `utf8_reverse`, `utf8_slice_codepoints`
+
+* scalar temporal functions: `day`, `day_of_week`, `day_of_year`,
+ `iso_calendar`, `iso_week`, `iso_year`, `hour`, `microsecond`, `millisecond`,
+ `minute`, `month`, `nanosecond`, `quarter`, `second`, `subsecond`, `year`
+
+* other scalar functions: `case_when`, `coalesce`, `if_else`, `is_finite`,
+ `is_inf`, `is_nan`, `max_element_wise`, `min_element_wise`, `make_struct`
+
+* vector functions: `replace_with_mask`
+
+Duplicates are now allowed in `SetLookupOptions::value_set` (ARROW-12554).
+
+Decimal types are now supported by some basic arithmetic functions
(ARROW-12074).
+
+The `take` function now supports dense unions (ARROW-13005).
+
+It is now possible to cast between dictionary types with different index
+types (ARROW-11673).
+
+Sorting is now implemented for boolean input (ARROW-12016).
+
+### CSV
+
+The streaming CSV reader can now read in parallel (ARROW-11889).
Review comment:
```suggestion
The streaming CSV reader can now take some advantage of multiple threads
(ARROW-11889).
```
Probably not safe to say it can read in parallel until ARROW-13155 is
released.
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