alamb commented on code in PR #91:
URL: https://github.com/apache/datafusion-site/pull/91#discussion_r2216920283
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content/blog/2025-07-25-datafusion-49.0.0.md:
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+ ---
+layout: post
+title: Apache DataFusion 49.0.0 Released
+date: 2025-07-20
+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 %}
+-->
+
+<!-- see https://github.com/apache/datafusion/issues/16347 for details -->
+
+## Introduction
+
+We are very proud to announce [DataFusion 49.0.0]. This blog highlights some
of the
+many major improvements since we released [DataFusion 48.0.0]. This new version
+represents a significant milestone for the project, packing in a wide range of
+improvements and fixes. You can find the complete details in the full
[changelog].
+
+[DataFusion 49.0.0]: https://crates.io/crates/datafusion/49.0.0
+[DataFusion 48.0.0]:
https://datafusion.apache.org/blog/2025/07/18/datafusion-48.0.0/
+[changelog]:
https://github.com/apache/datafusion/blob/branch-49/dev/changelog/49.0.0.md
+
+[Apache DataFusion] is an extensible query engine, written in [Rust], that
+uses [Apache Arrow] as its in-memory format. DataFusion is used by developers
to
+create new, fast data centric systems such as databases, dataframe libraries,
+machine learning and streaming applications. While [DataFusion’s primary design
+goal] is to accelerate the creation of other data centric systems, it has a
+reasonable experience directly out of the box as a [dataframe library],
+[python library] and [command line SQL tool].
+
+[apache datafusion]: https://datafusion.apache.org/
+[rust]: https://www.rust-lang.org/
+[apache arrow]: https://arrow.apache.org
+[DataFusion’s primary design goal]:
https://datafusion.apache.org/user-guide/introduction.html#project-goals
+[dataframe library]: https://datafusion.apache.org/user-guide/dataframe.html
+[python library]: https://datafusion.apache.org/python/
+[command line SQL tool]: https://datafusion.apache.org/user-guide/cli/
+
+DataFusion's core thesis is that as a community, together we can build much
more
+advanced technology than any of us as individuals or companies could do alone.
+Without DataFusion, highly performant vectorized query engines would remain
+the domain of a few large companies and world-class research institutions.
+With DataFusion, we can all build on top of a shared foundation, and focus on
+what makes our projects unique.
+
+## Community Growth 📈
+
+In the last few months, between `46.0.0` and `49.0.0`, our community continues
to grow in new and exciting ways.
+
+1. We added several PMC members and new committers: [berkay], [xudong963] and
[timsaucer] joined the PMC,
+ [blaginin], [milenkovicm], [adriangb] and [kosiew] joined as committers.
See the [mailing list] for more details.
+2. In the [core DataFusion repo] alone we reviewed and accepted almost fixme
PRs from fixme different
+ committers, created over fixme issues and closed fixme of them 🚀. All
changes are listed in the detailed
+ [changelogs].
+3. DataFusion published a number of blog posts including [User defined Window
Functions], Optimizing SQL (and DataFrames)
+ in DataFusion [part 1], [part 2] and [Using Rust async for Query Execution
and Cancelling Long-Running Queries].
+
+[core DataFusion repo]: https://github.com/apache/arrow-datafusion
+[changelogs]: https://github.com/apache/datafusion/tree/main/dev/changelog
+[mailing list]: https://lists.apache.org/list.html?d...@datafusion.apache.org
+[berkay]: https://github.com/berkaysynnada
+[xudong963]: https://github.com/xudong963
+[timsaucer]: https://github.com/timsaucer
+[blaginin]: https://github.com/blaginin
+[milenkovicm]: https://github.com/milenkovicm
+[adriangb]: https://github.com/adriangb
+[kosiew]: https://github.com/kosiew
+[Use defined Window Functions]:
https://datafusion.apache.org/blog/2025/04/19/user-defined-window-functions
+[part 1]:
https://datafusion.apache.org/blog/2025/06/15/optimizing-sql-dataframes-part-one
+[part 2]:
https://datafusion.apache.org/blog/2025/06/15/optimizing-sql-dataframes-part-two
+[Using Rust async for Query Execution and Cancelling Long-Running Queries]:
https://datafusion.apache.org/blog/2025/06/30/cancellation
+
+<!--
+$ git log --pretty=oneline 48.0.0..49.0.0 . | wc -l
+ 1532 (fixme)
+
+$ git shortlog -sn 48.0.0..49.0.0 . | wc -l
+ 206 (fixme)
+
+https://crates.io/crates/datafusion/49.0.0
+DataFusion 49 released July 25, 2025
+
+https://crates.io/crates/datafusion/46.0.0
+DataFusion 46 released March 7, 2025
+
+Issues created in this time: 271 open, 320 closed
+https://github.com/apache/datafusion/issues?q=is%3Aissue+created%3A2025-03-07..2025-07-25
+
+Issues closed: 440
+https://github.com/apache/arrow-datafusion/issues?q=is%3Aissue+closed%3A2025-03-07..2025-07-25
+
+PRs merged in this time 751
+https://github.com/apache/arrow-datafusion/pulls?q=is%3Apr+merged%3A2025-03-07..2025-07-25
+
+-->
+
+## Breaking Changes
Review Comment:
SOme feedback I got on other posts was that leading with breaking changes
was kind of jarring -- I think the link to the upgrade guide at the end of the
post is probably adequate for now
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