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commit ed982f9b909c847f4568c2cc0002befec7a9de46
Author: Build Pelican (action) <[email protected]>
AuthorDate: Thu Dec 4 21:09:21 2025 +0000
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---
.../2025/12/04/datafusion-comet-0.12.0/index.html | 230 +++++++++++++++++++++
output/author/pmc.html | 32 +++
output/category/blog.html | 32 +++
output/feed.xml | 24 ++-
output/feeds/all-en.atom.xml | 124 ++++++++++-
output/feeds/blog.atom.xml | 124 ++++++++++-
output/feeds/pmc.atom.xml | 124 ++++++++++-
output/feeds/pmc.rss.xml | 24 ++-
output/index.html | 41 ++++
9 files changed, 750 insertions(+), 5 deletions(-)
diff --git a/output/2025/12/04/datafusion-comet-0.12.0/index.html
b/output/2025/12/04/datafusion-comet-0.12.0/index.html
new file mode 100644
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--- /dev/null
+++ b/output/2025/12/04/datafusion-comet-0.12.0/index.html
@@ -0,0 +1,230 @@
+<!doctype html>
+<html class="no-js" lang="en" dir="ltr">
+ <head>
+ <meta charset="utf-8">
+ <meta http-equiv="x-ua-compatible" content="ie=edge">
+ <meta name="viewport" content="width=device-width, initial-scale=1.0">
+ <title>Apache DataFusion Comet 0.12.0 Release - Apache DataFusion
Blog</title>
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+ <div class="col-12 col-md-8 main-content">
+ <h1>
+ Apache DataFusion Comet 0.12.0 Release
+ </h1>
+ <p>Posted on: Thu 04 December 2025 by pmc</p>
+
+ <aside class="toc-container d-md-none mb-2">
+ <div class="toc"><span class="toctitle">Contents</span><ul>
+<li><a href="#release-highlights">Release Highlights</a><ul>
+<li><a href="#experimental-native-apache-iceberg-scan-support">Experimental
Native Apache Iceberg Scan Support</a></li>
+<li><a href="#code-architecture-improvements">Code Architecture
Improvements</a></li>
+<li><a href="#new-sql-functions">New SQL Functions</a></li>
+<li><a href="#new-operators">New Operators</a></li>
+<li><a href="#configuration-and-usability-improvements">Configuration and
Usability Improvements</a></li>
+<li><a href="#bug-fixes">Bug Fixes</a></li>
+<li><a href="#documentation-improvements">Documentation Improvements</a></li>
+<li><a href="#dependency-updates">Dependency Updates</a></li>
+<li><a href="#spark-compatibility">Spark Compatibility</a></li>
+</ul>
+</li>
+<li><a href="#getting-involved">Getting Involved</a></li>
+</ul>
+</div>
+ </aside>
+
+ <!--
+{% 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 %}
+-->
+
+<p>The Apache DataFusion PMC is pleased to announce version 0.12.0 of the <a
href="https://datafusion.apache.org/comet/";>Comet</a> subproject.</p>
+<p>Comet is an accelerator for Apache Spark that translates Spark physical
plans to DataFusion physical plans for
+improved performance and efficiency without requiring any code changes.</p>
+<p>This release covers approximately four weeks of development work and is the
result of merging 105 PRs from 13
+contributors. See the <a
href="https://github.com/apache/datafusion-comet/blob/main/dev/changelog/0.12.0.md";>change
log</a> for more information.</p>
+<h2 id="release-highlights">Release Highlights<a class="headerlink"
href="#release-highlights" title="Permanent link">¶</a></h2>
+<h3 id="experimental-native-apache-iceberg-scan-support">Experimental Native
Apache Iceberg Scan Support<a class="headerlink"
href="#experimental-native-apache-iceberg-scan-support" title="Permanent
link">¶</a></h3>
+<p>Comet has a new, experimental, <a
href="https://github.com/apache/datafusion-comet/pull/2528";>native Iceberg
scan</a>. This work relies on <a
href="https://github.com/apache/iceberg-rust";>iceberg-rust</a> and the Parquet
reader from <a href="https://github.com/apache/arrow-rs";>arrow-rs</a> that
Comet already uses to great effect. Comet’s <a
href="https://datafusion.apache.org/comet/user-guide/0.12/iceberg.html";>existing
Iceberg integration</a> relies on a modified Iceberg Java build t [...]
+<p>This represents a significant step forward in Comet's support for data
lakehouse architectures and expands the range of workloads that can benefit
from native acceleration. Please take a look at the PR and Comet’s
documentation to understand the current limitations and try it on your
workloads! We are eager for feedback on this approach.</p>
+<h3 id="code-architecture-improvements">Code Architecture Improvements<a
class="headerlink" href="#code-architecture-improvements" title="Permanent
link">¶</a></h3>
+<p>This release includes significant refactoring to improve code
maintainability and extensibility, and we will continue those efforts into
0.13.0 development:</p>
+<ul>
+<li><strong>Unified operator serialization</strong>: The <a
href="https://github.com/apache/datafusion-comet/pull/2768";>CometExecRule
refactor</a> unifies CometNativeExec creation with serialization through the
new <code>CometOperatorSerde</code> trait</li>
+<li><strong>Expression serde refactoring</strong>: Multiple PRs (<a
href="https://github.com/apache/datafusion-comet/pull/2738";>#2738</a>, <a
href="https://github.com/apache/datafusion-comet/pull/2741";>#2741</a>, <a
href="https://github.com/apache/datafusion-comet/pull/2791";>#2791</a>) moved
expression serialization logic out of <code>QueryPlanSerde</code> into
specialized traits</li>
+<li><strong>Aggregate expression improvements</strong>: <a
href="https://github.com/apache/datafusion-comet/pull/2777";>Added
getSupportLevel to CometAggregateExpressionSerde trait</a> for better aggregate
function handling</li>
+</ul>
+<p>These architectural improvements make it easier for contributors to add new
operators and expressions while reducing code complexity.</p>
+<h3 id="new-sql-functions">New SQL Functions<a class="headerlink"
href="#new-sql-functions" title="Permanent link">¶</a></h3>
+<p>The following SQL functions are now supported:</p>
+<ul>
+<li><a
href="https://github.com/apache/datafusion-comet/pull/2604";><code>concat</code></a>
- String concatenation</li>
+<li><a
href="https://github.com/apache/datafusion-comet/pull/2689";><code>abs</code></a>
- Absolute value</li>
+<li><a
href="https://github.com/apache/datafusion-comet/pull/2471";><code>sha1</code></a>
- SHA-1 hash function</li>
+<li><a
href="https://github.com/apache/datafusion-comet/pull/2755";><code>cot</code></a>
- Cotangent function</li>
+<li><a href="https://github.com/apache/datafusion-comet/pull/2784";>Hyperbolic
trigonometric functions</a> - sinh, cosh, tanh, and their inverse functions</li>
+</ul>
+<h3 id="new-operators">New Operators<a class="headerlink"
href="#new-operators" title="Permanent link">¶</a></h3>
+<ul>
+<li><a
href="https://github.com/apache/datafusion-comet/pull/2735";><code>CometLocalTableScanExec</code></a>
- Native support for local table scans, eliminating fallback to Spark for
small, in-memory datasets</li>
+</ul>
+<h3 id="configuration-and-usability-improvements">Configuration and Usability
Improvements<a class="headerlink"
href="#configuration-and-usability-improvements" title="Permanent
link">¶</a></h3>
+<ul>
+<li><strong>Simplified on-heap configuration</strong>: <a
href="https://github.com/apache/datafusion-comet/pull/2599";>Simplified on-heap
memory configuration</a> for easier setup</li>
+<li><strong>Extended explain format</strong>: <a
href="https://github.com/apache/datafusion-comet/pull/2644";>Renamed and
improved COMET_EXTENDED_EXPLAIN_FORMAT</a> with better defaults</li>
+<li><strong>Environment variable support</strong>: <a
href="https://github.com/apache/datafusion-comet/pull/2722";>Improved framework
for setting configs with environment variables</a></li>
+<li><strong>Native config passing</strong>: <a
href="https://github.com/apache/datafusion-comet/pull/2801";>All Comet configs
now passed to native plan</a></li>
+<li><strong>Config categorization</strong>: <a
href="https://github.com/apache/datafusion-comet/pull/2740";>Categorized testing
configs</a> and added notes about known timezone issues</li>
+<li><strong>Removed legacy configs</strong>: <a
href="https://github.com/apache/datafusion-comet/pull/2786";>Removed
COMET_EXPR_ALLOW_INCOMPATIBLE config</a> to simplify configuration</li>
+</ul>
+<h3 id="bug-fixes">Bug Fixes<a class="headerlink" href="#bug-fixes"
title="Permanent link">¶</a></h3>
+<p>This release includes numerous bug fixes:</p>
+<ul>
+<li><a href="https://github.com/apache/datafusion-comet/pull/2606";>Fixed
None.get in stringDecode</a> when binary child cannot be converted</li>
+<li><a href="https://github.com/apache/datafusion-comet/pull/2630";>Proper
fallback for lpad/rpad with unsupported arguments</a></li>
+<li><a href="https://github.com/apache/datafusion-comet/pull/2634";>Fixed
trunc/date_trunc with unsupported format strings</a></li>
+<li><a href="https://github.com/apache/datafusion-comet/pull/2675";>Corrected
single partition handling in native_datafusion</a></li>
+<li><a href="https://github.com/apache/datafusion-comet/pull/2687";>Fixed
LeftSemi join handling</a> - do not replace SMJ with HJ</li>
+<li><a href="https://github.com/apache/datafusion-comet/pull/2718";>Fixed
CometLiteral class cast exception with arrays</a></li>
+<li><a href="https://github.com/apache/datafusion-comet/pull/2716";>Fixed
missing SortOrder fallback reason in range partitioning</a></li>
+<li><a href="https://github.com/apache/datafusion-comet/pull/2728";>Improved
checkSparkMaybeThrows to compare results in success case</a></li>
+<li><a href="https://github.com/apache/datafusion-comet/pull/2643";>Fixed null
handling in CometVector implementations</a></li>
+</ul>
+<h3 id="documentation-improvements">Documentation Improvements<a
class="headerlink" href="#documentation-improvements" title="Permanent
link">¶</a></h3>
+<ul>
+<li><a href="https://github.com/apache/datafusion-comet/pull/2668";>Added FFI
documentation to contributor guide</a></li>
+<li><a href="https://github.com/apache/datafusion-comet/pull/2704";>Updated
contributor guide for adding new expressions</a> and <a
href="https://github.com/apache/datafusion-comet/pull/2758";>operators</a></li>
+<li><a href="https://github.com/apache/datafusion-comet/pull/2587";>Improved
documentation layout</a> and <a
href="https://github.com/apache/datafusion-comet/pull/2597";>navigation</a></li>
+<li><a href="https://github.com/apache/datafusion-comet/pull/2783";>Added
prettier enforcement</a> for consistent markdown formatting</li>
+<li><a href="https://github.com/apache/datafusion-comet/pull/2779";>CI check to
ensure generated docs are in sync</a></li>
+<li>Various documentation updates for <a
href="https://github.com/apache/datafusion-comet/pull/2694";>SortOrder
expressions</a>, <a
href="https://github.com/apache/datafusion-comet/pull/2742";>LocalTableScan and
WindowExec</a>, and <a
href="https://github.com/apache/datafusion-comet/pull/2712";>Spark SQL
tests</a></li>
+</ul>
+<h3 id="dependency-updates">Dependency Updates<a class="headerlink"
href="#dependency-updates" title="Permanent link">¶</a></h3>
+<ul>
+<li><a href="https://github.com/apache/datafusion-comet/pull/2574";>Upgraded to
Spark 3.5.7</a></li>
+<li><a href="https://github.com/apache/datafusion-comet/pull/2605";>Upgraded to
DataFusion 50.3.0</a></li>
+<li><a href="https://github.com/apache/datafusion-comet/pull/2608";>Upgraded
Parquet from 56.0.0 to 56.2.0</a></li>
+<li>Various other dependency updates via Dependabot</li>
+</ul>
+<h3 id="spark-compatibility">Spark Compatibility<a class="headerlink"
href="#spark-compatibility" title="Permanent link">¶</a></h3>
+<ul>
+<li>Spark 3.4.3 with JDK 11 & 17, Scala 2.12 & 2.13</li>
+<li>Spark 3.5.4 through 3.5.7 with JDK 11 & 17, Scala 2.12 & 2.13</li>
+<li>Spark 4.0.1 with JDK 17, Scala 2.13</li>
+</ul>
+<p>We are looking for help from the community to fully support Spark 4.0.1.
See <a href="https://github.com/apache/datafusion-comet/issues/1637";>EPIC:
Support 4.0.0</a> for more information.</p>
+<h2 id="getting-involved">Getting Involved<a class="headerlink"
href="#getting-involved" title="Permanent link">¶</a></h2>
+<p>The Comet project welcomes new contributors. We use the same <a
href="https://datafusion.apache.org/contributor-guide/communication.html#slack-and-discord";>Slack
and Discord</a> channels as the main DataFusion
+project and have a weekly <a
href="https://docs.google.com/document/d/1NBpkIAuU7O9h8Br5CbFksDhX-L9TyO9wmGLPMe0Plc8/edit?usp=sharing";>DataFusion
video call</a>.</p>
+<p>The easiest way to get involved is to test Comet with your current Spark
jobs and file issues for any bugs or
+performance regressions that you find. See the <a
href="https://datafusion.apache.org/comet/user-guide/installation.html";>Getting
Started</a> guide for instructions on downloading and installing
+Comet.</p>
+<p>There are also many <a
href="https://github.com/apache/datafusion-comet/contribute";>good first
issues</a> waiting for contributions.</p>
+
+<!--
+ Comments Section
+ Loaded only after explicit visitor consent to comply with ASF policy.
+-->
+
+<div id="comments">
+ <hr>
+ <h3>Comments</h3>
+
+ <!-- Local loader script -->
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+ We use <a href="https://giscus.app/";>Giscus</a> for comments, powered
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+ <!-- Container where Giscus will render -->
+ <div id="comment-thread"></div>
+</div> </div>
+ <aside class="toc-container d-none d-md-block col-md-4 col-xl-3 ms-xl-2">
+ <div class="toc"><span class="toctitle">Contents</span><ul>
+<li><a href="#release-highlights">Release Highlights</a><ul>
+<li><a href="#experimental-native-apache-iceberg-scan-support">Experimental
Native Apache Iceberg Scan Support</a></li>
+<li><a href="#code-architecture-improvements">Code Architecture
Improvements</a></li>
+<li><a href="#new-sql-functions">New SQL Functions</a></li>
+<li><a href="#new-operators">New Operators</a></li>
+<li><a href="#configuration-and-usability-improvements">Configuration and
Usability Improvements</a></li>
+<li><a href="#bug-fixes">Bug Fixes</a></li>
+<li><a href="#documentation-improvements">Documentation Improvements</a></li>
+<li><a href="#dependency-updates">Dependency Updates</a></li>
+<li><a href="#spark-compatibility">Spark Compatibility</a></li>
+</ul>
+</li>
+<li><a href="#getting-involved">Getting Involved</a></li>
+</ul>
+</div>
+ </aside>
+ </div>
+ </div>
+</div>
+ <!-- footer -->
+ <div class="row g-0">
+ <div class="col-12">
+ <p style="font-style: italic; font-size: 0.8rem; text-align: center;">
+ Copyright 2025, <a href="https://www.apache.org/";>The Apache
Software Foundation</a>, Licensed under the <a
href="https://www.apache.org/licenses/LICENSE-2.0";>Apache License, Version
2.0</a>.<br/>
+ Apache® and the Apache feather logo are trademarks of The Apache
Software Foundation.
+ </p>
+ </div>
+ </div>
+ <script src="/blog/js/bootstrap.bundle.min.js"></script> </main>
+ </body>
+</html>
diff --git a/output/author/pmc.html b/output/author/pmc.html
index 17352bd..c638f01 100644
--- a/output/author/pmc.html
+++ b/output/author/pmc.html
@@ -20,6 +20,38 @@
<h2>Articles by pmc</h2>
<ol id="post-list">
+ <li><article class="hentry">
+ <header> <h2 class="entry-title"><a
href="https://datafusion.apache.org/blog/2025/12/04/datafusion-comet-0.12.0";
rel="bookmark" title="Permalink to Apache DataFusion Comet 0.12.0
Release">Apache DataFusion Comet 0.12.0 Release</a></h2> </header>
+ <footer class="post-info">
+ <time class="published"
datetime="2025-12-04T00:00:00+00:00"> Thu 04 December 2025 </time>
+ <address class="vcard author">By
+ <a class="url fn"
href="https://datafusion.apache.org/blog/author/pmc.html";>pmc</a>
+ </address>
+ </footer><!-- /.post-info -->
+ <div class="entry-content"> <!--
+{% 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 %}
+-->
+
+<p>The Apache DataFusion PMC is pleased to announce version 0.12.0 of the <a
href="https://datafusion.apache.org/comet/";>Comet</a> subproject.</p>
+<p>Comet is an accelerator for Apache Spark that translates Spark physical
plans to DataFusion physical plans for
+improved performance and efficiency without requiring any code changes.</p>
+<p>This release covers approximately four weeks of development …</p>
</div><!-- /.entry-content -->
+ </article></li>
<li><article class="hentry">
<header> <h2 class="entry-title"><a
href="https://datafusion.apache.org/blog/2025/11/25/datafusion-51.0.0";
rel="bookmark" title="Permalink to Apache DataFusion 51.0.0 Released">Apache
DataFusion 51.0.0 Released</a></h2> </header>
<footer class="post-info">
diff --git a/output/category/blog.html b/output/category/blog.html
index ca7402f..88ce4fd 100644
--- a/output/category/blog.html
+++ b/output/category/blog.html
@@ -21,6 +21,38 @@
<h2>Articles in the blog category</h2>
<ol id="post-list">
+ <li><article class="hentry">
+ <header> <h2 class="entry-title"><a
href="https://datafusion.apache.org/blog/2025/12/04/datafusion-comet-0.12.0";
rel="bookmark" title="Permalink to Apache DataFusion Comet 0.12.0
Release">Apache DataFusion Comet 0.12.0 Release</a></h2> </header>
+ <footer class="post-info">
+ <time class="published"
datetime="2025-12-04T00:00:00+00:00"> Thu 04 December 2025 </time>
+ <address class="vcard author">By
+ <a class="url fn"
href="https://datafusion.apache.org/blog/author/pmc.html";>pmc</a>
+ </address>
+ </footer><!-- /.post-info -->
+ <div class="entry-content"> <!--
+{% 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 %}
+-->
+
+<p>The Apache DataFusion PMC is pleased to announce version 0.12.0 of the <a
href="https://datafusion.apache.org/comet/";>Comet</a> subproject.</p>
+<p>Comet is an accelerator for Apache Spark that translates Spark physical
plans to DataFusion physical plans for
+improved performance and efficiency without requiring any code changes.</p>
+<p>This release covers approximately four weeks of development …</p>
</div><!-- /.entry-content -->
+ </article></li>
<li><article class="hentry">
<header> <h2 class="entry-title"><a
href="https://datafusion.apache.org/blog/2025/11/25/datafusion-51.0.0";
rel="bookmark" title="Permalink to Apache DataFusion 51.0.0 Released">Apache
DataFusion 51.0.0 Released</a></h2> </header>
<footer class="post-info">
diff --git a/output/feed.xml b/output/feed.xml
index 9402597..1f432e3 100644
--- a/output/feed.xml
+++ b/output/feed.xml
@@ -1,5 +1,27 @@
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-<rss version="2.0"><channel><title>Apache DataFusion
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25 Nov 2025 00:00:00 +0000</lastBuildDate><item><title>Apache DataFusion
51.0.0
Released</title><link>https://datafusion.apache.org/blog/2025/11/25/datafusion-51.0.0</link><description><!--
+<rss version="2.0"><channel><title>Apache DataFusion
Blog</title><link>https://datafusion.apache.org/blog/</link><description></description><lastBuildDate>Thu,
04 Dec 2025 00:00:00 +0000</lastBuildDate><item><title>Apache DataFusion Comet
0.12.0
Release</title><link>https://datafusion.apache.org/blog/2025/12/04/datafusion-comet-0.12.0</link><description><!--
+{% 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 %}
+-->
+
+<p>The Apache DataFusion PMC is pleased to announce version 0.12.0 of
the <a href="https://datafusion.apache.org/comet/">Comet</a>
subproject.</p>
+<p>Comet is an accelerator for Apache Spark that translates Spark
physical plans to DataFusion physical plans for
+improved performance and efficiency without requiring any code
changes.</p>
+<p>This release covers approximately four weeks of development
…</p></description><dc:creator
xmlns:dc="http://purl.org/dc/elements/1.1/";>pmc</dc:creator><pubDate>Thu, 04
Dec 2025 00:00:00 +0000</pubDate><guid
isPermaLink="false">tag:datafusion.apache.org,2025-12-04:/blog/2025/12/04/datafusion-comet-0.12.0</guid><category>blog</category></item><item><title>Apache
DataFusion 51.0.0
Released</title><link>https://datafusion.apache.org/blog/2025/11/25/datafusion-51.0.0</link><des
[...]
{% comment %}
Licensed to the Apache Software Foundation (ASF) under one or more
contributor license agreements. See the NOTICE file distributed with
diff --git a/output/feeds/all-en.atom.xml b/output/feeds/all-en.atom.xml
index 88c0c37..033f1d6 100644
--- a/output/feeds/all-en.atom.xml
+++ b/output/feeds/all-en.atom.xml
@@ -1,5 +1,127 @@
<?xml version="1.0" encoding="utf-8"?>
-<feed xmlns="http://www.w3.org/2005/Atom";><title>Apache DataFusion
Blog</title><link href="https://datafusion.apache.org/blog/";
rel="alternate"></link><link
href="https://datafusion.apache.org/blog/feeds/all-en.atom.xml";
rel="self"></link><id>https://datafusion.apache.org/blog/</id><updated>2025-11-25T00:00:00+00:00</updated><subtitle></subtitle><entry><title>Apache
DataFusion 51.0.0 Released</title><link
href="https://datafusion.apache.org/blog/2025/11/25/datafusion-51.0.0";
rel="alterna [...]
+<feed xmlns="http://www.w3.org/2005/Atom";><title>Apache DataFusion
Blog</title><link href="https://datafusion.apache.org/blog/";
rel="alternate"></link><link
href="https://datafusion.apache.org/blog/feeds/all-en.atom.xml";
rel="self"></link><id>https://datafusion.apache.org/blog/</id><updated>2025-12-04T00:00:00+00:00</updated><subtitle></subtitle><entry><title>Apache
DataFusion Comet 0.12.0 Release</title><link
href="https://datafusion.apache.org/blog/2025/12/04/datafusion-comet-0.12.0"; r
[...]
+{% 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 %}
+-->
+
+<p>The Apache DataFusion PMC is pleased to announce version 0.12.0 of
the <a href="https://datafusion.apache.org/comet/">Comet</a>
subproject.</p>
+<p>Comet is an accelerator for Apache Spark that translates Spark
physical plans to DataFusion physical plans for
+improved performance and efficiency without requiring any code
changes.</p>
+<p>This release covers approximately four weeks of development
…</p></summary><content type="html"><!--
+{% 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 %}
+-->
+
+<p>The Apache DataFusion PMC is pleased to announce version 0.12.0 of
the <a href="https://datafusion.apache.org/comet/">Comet</a>
subproject.</p>
+<p>Comet is an accelerator for Apache Spark that translates Spark
physical plans to DataFusion physical plans for
+improved performance and efficiency without requiring any code
changes.</p>
+<p>This release covers approximately four weeks of development work and
is the result of merging 105 PRs from 13
+contributors. See the <a
href="https://github.com/apache/datafusion-comet/blob/main/dev/changelog/0.12.0.md">change
log</a> for more information.</p>
+<h2 id="release-highlights">Release Highlights<a class="headerlink"
href="#release-highlights" title="Permanent link">¶</a></h2>
+<h3 id="experimental-native-apache-iceberg-scan-support">Experimental
Native Apache Iceberg Scan Support<a class="headerlink"
href="#experimental-native-apache-iceberg-scan-support" title="Permanent
link">¶</a></h3>
+<p>Comet has a new, experimental, <a
href="https://github.com/apache/datafusion-comet/pull/2528">native Iceberg
scan</a>. This work relies on <a
href="https://github.com/apache/iceberg-rust">iceberg-rust</a> and the
Parquet reader from <a
href="https://github.com/apache/arrow-rs">arrow-rs</a> that Comet
already uses to great effect. Comet’s <a
href="https://datafusion.apache.org/comet/user-guide/0.12/iceberg.html">existing
Iceberg integrati [...]
+<p>This represents a significant step forward in Comet's support for
data lakehouse architectures and expands the range of workloads that can
benefit from native acceleration. Please take a look at the PR and Comet’s
documentation to understand the current limitations and try it on your
workloads! We are eager for feedback on this approach.</p>
+<h3 id="code-architecture-improvements">Code Architecture
Improvements<a class="headerlink" href="#code-architecture-improvements"
title="Permanent link">¶</a></h3>
+<p>This release includes significant refactoring to improve code
maintainability and extensibility, and we will continue those efforts into
0.13.0 development:</p>
+<ul>
+<li><strong>Unified operator serialization</strong>: The
<a
href="https://github.com/apache/datafusion-comet/pull/2768">CometExecRule
refactor</a> unifies CometNativeExec creation with serialization through
the new <code>CometOperatorSerde</code> trait</li>
+<li><strong>Expression serde refactoring</strong>: Multiple
PRs (<a
href="https://github.com/apache/datafusion-comet/pull/2738">#2738</a>,
<a
href="https://github.com/apache/datafusion-comet/pull/2741">#2741</a>,
<a
href="https://github.com/apache/datafusion-comet/pull/2791">#2791</a>)
moved expression serialization logic out of
<code>QueryPlanSerde</code> into specialized traits</li>
+<li><strong>Aggregate expression improvements</strong>:
<a href="https://github.com/apache/datafusion-comet/pull/2777">Added
getSupportLevel to CometAggregateExpressionSerde trait</a> for better
aggregate function handling</li>
+</ul>
+<p>These architectural improvements make it easier for contributors to
add new operators and expressions while reducing code complexity.</p>
+<h3 id="new-sql-functions">New SQL Functions<a class="headerlink"
href="#new-sql-functions" title="Permanent link">¶</a></h3>
+<p>The following SQL functions are now supported:</p>
+<ul>
+<li><a
href="https://github.com/apache/datafusion-comet/pull/2604"><code>concat</code></a>
- String concatenation</li>
+<li><a
href="https://github.com/apache/datafusion-comet/pull/2689"><code>abs</code></a>
- Absolute value</li>
+<li><a
href="https://github.com/apache/datafusion-comet/pull/2471"><code>sha1</code></a>
- SHA-1 hash function</li>
+<li><a
href="https://github.com/apache/datafusion-comet/pull/2755"><code>cot</code></a>
- Cotangent function</li>
+<li><a
href="https://github.com/apache/datafusion-comet/pull/2784">Hyperbolic
trigonometric functions</a> - sinh, cosh, tanh, and their inverse
functions</li>
+</ul>
+<h3 id="new-operators">New Operators<a class="headerlink"
href="#new-operators" title="Permanent link">¶</a></h3>
+<ul>
+<li><a
href="https://github.com/apache/datafusion-comet/pull/2735"><code>CometLocalTableScanExec</code></a>
- Native support for local table scans, eliminating fallback to Spark for
small, in-memory datasets</li>
+</ul>
+<h3 id="configuration-and-usability-improvements">Configuration and
Usability Improvements<a class="headerlink"
href="#configuration-and-usability-improvements" title="Permanent
link">¶</a></h3>
+<ul>
+<li><strong>Simplified on-heap configuration</strong>: <a
href="https://github.com/apache/datafusion-comet/pull/2599">Simplified
on-heap memory configuration</a> for easier setup</li>
+<li><strong>Extended explain format</strong>: <a
href="https://github.com/apache/datafusion-comet/pull/2644">Renamed and
improved COMET_EXTENDED_EXPLAIN_FORMAT</a> with better defaults</li>
+<li><strong>Environment variable support</strong>: <a
href="https://github.com/apache/datafusion-comet/pull/2722">Improved
framework for setting configs with environment variables</a></li>
+<li><strong>Native config passing</strong>: <a
href="https://github.com/apache/datafusion-comet/pull/2801">All Comet
configs now passed to native plan</a></li>
+<li><strong>Config categorization</strong>: <a
href="https://github.com/apache/datafusion-comet/pull/2740">Categorized
testing configs</a> and added notes about known timezone issues</li>
+<li><strong>Removed legacy configs</strong>: <a
href="https://github.com/apache/datafusion-comet/pull/2786">Removed
COMET_EXPR_ALLOW_INCOMPATIBLE config</a> to simplify
configuration</li>
+</ul>
+<h3 id="bug-fixes">Bug Fixes<a class="headerlink" href="#bug-fixes"
title="Permanent link">¶</a></h3>
+<p>This release includes numerous bug fixes:</p>
+<ul>
+<li><a
href="https://github.com/apache/datafusion-comet/pull/2606">Fixed None.get
in stringDecode</a> when binary child cannot be converted</li>
+<li><a
href="https://github.com/apache/datafusion-comet/pull/2630">Proper fallback
for lpad/rpad with unsupported arguments</a></li>
+<li><a
href="https://github.com/apache/datafusion-comet/pull/2634">Fixed
trunc/date_trunc with unsupported format strings</a></li>
+<li><a
href="https://github.com/apache/datafusion-comet/pull/2675">Corrected single
partition handling in native_datafusion</a></li>
+<li><a
href="https://github.com/apache/datafusion-comet/pull/2687">Fixed LeftSemi
join handling</a> - do not replace SMJ with HJ</li>
+<li><a
href="https://github.com/apache/datafusion-comet/pull/2718">Fixed
CometLiteral class cast exception with arrays</a></li>
+<li><a
href="https://github.com/apache/datafusion-comet/pull/2716">Fixed missing
SortOrder fallback reason in range partitioning</a></li>
+<li><a
href="https://github.com/apache/datafusion-comet/pull/2728">Improved
checkSparkMaybeThrows to compare results in success case</a></li>
+<li><a
href="https://github.com/apache/datafusion-comet/pull/2643">Fixed null
handling in CometVector implementations</a></li>
+</ul>
+<h3 id="documentation-improvements">Documentation Improvements<a
class="headerlink" href="#documentation-improvements" title="Permanent
link">¶</a></h3>
+<ul>
+<li><a
href="https://github.com/apache/datafusion-comet/pull/2668">Added FFI
documentation to contributor guide</a></li>
+<li><a
href="https://github.com/apache/datafusion-comet/pull/2704">Updated
contributor guide for adding new expressions</a> and <a
href="https://github.com/apache/datafusion-comet/pull/2758">operators</a></li>
+<li><a
href="https://github.com/apache/datafusion-comet/pull/2587">Improved
documentation layout</a> and <a
href="https://github.com/apache/datafusion-comet/pull/2597">navigation</a></li>
+<li><a
href="https://github.com/apache/datafusion-comet/pull/2783">Added prettier
enforcement</a> for consistent markdown formatting</li>
+<li><a
href="https://github.com/apache/datafusion-comet/pull/2779">CI check to
ensure generated docs are in sync</a></li>
+<li>Various documentation updates for <a
href="https://github.com/apache/datafusion-comet/pull/2694">SortOrder
expressions</a>, <a
href="https://github.com/apache/datafusion-comet/pull/2742">LocalTableScan
and WindowExec</a>, and <a
href="https://github.com/apache/datafusion-comet/pull/2712">Spark SQL
tests</a></li>
+</ul>
+<h3 id="dependency-updates">Dependency Updates<a class="headerlink"
href="#dependency-updates" title="Permanent link">¶</a></h3>
+<ul>
+<li><a
href="https://github.com/apache/datafusion-comet/pull/2574">Upgraded to
Spark 3.5.7</a></li>
+<li><a
href="https://github.com/apache/datafusion-comet/pull/2605">Upgraded to
DataFusion 50.3.0</a></li>
+<li><a
href="https://github.com/apache/datafusion-comet/pull/2608">Upgraded Parquet
from 56.0.0 to 56.2.0</a></li>
+<li>Various other dependency updates via Dependabot</li>
+</ul>
+<h3 id="spark-compatibility">Spark Compatibility<a class="headerlink"
href="#spark-compatibility" title="Permanent link">¶</a></h3>
+<ul>
+<li>Spark 3.4.3 with JDK 11 &amp; 17, Scala 2.12 &amp;
2.13</li>
+<li>Spark 3.5.4 through 3.5.7 with JDK 11 &amp; 17, Scala 2.12
&amp; 2.13</li>
+<li>Spark 4.0.1 with JDK 17, Scala 2.13</li>
+</ul>
+<p>We are looking for help from the community to fully support Spark
4.0.1. See <a
href="https://github.com/apache/datafusion-comet/issues/1637">EPIC: Support
4.0.0</a> for more information.</p>
+<h2 id="getting-involved">Getting Involved<a class="headerlink"
href="#getting-involved" title="Permanent link">¶</a></h2>
+<p>The Comet project welcomes new contributors. We use the same <a
href="https://datafusion.apache.org/contributor-guide/communication.html#slack-and-discord">Slack
and Discord</a> channels as the main DataFusion
+project and have a weekly <a
href="https://docs.google.com/document/d/1NBpkIAuU7O9h8Br5CbFksDhX-L9TyO9wmGLPMe0Plc8/edit?usp=sharing">DataFusion
video call</a>.</p>
+<p>The easiest way to get involved is to test Comet with your current
Spark jobs and file issues for any bugs or
+performance regressions that you find. See the <a
href="https://datafusion.apache.org/comet/user-guide/installation.html">Getting
Started</a> guide for instructions on downloading and installing
+Comet.</p>
+<p>There are also many <a
href="https://github.com/apache/datafusion-comet/contribute">good first
issues</a> waiting for contributions.</p></content><category
term="blog"></category></entry><entry><title>Apache DataFusion 51.0.0
Released</title><link
href="https://datafusion.apache.org/blog/2025/11/25/datafusion-51.0.0";
rel="alternate"></link><published>2025-11-25T00:00:00+00:00</published><updated>2025-11-25T00:00:00+00:00</updated><author><name>pmc</name></autho
[...]
{% comment %}
Licensed to the Apache Software Foundation (ASF) under one or more
contributor license agreements. See the NOTICE file distributed with
diff --git a/output/feeds/blog.atom.xml b/output/feeds/blog.atom.xml
index 2f62d68..bf7e7fa 100644
--- a/output/feeds/blog.atom.xml
+++ b/output/feeds/blog.atom.xml
@@ -1,5 +1,127 @@
<?xml version="1.0" encoding="utf-8"?>
-<feed xmlns="http://www.w3.org/2005/Atom";><title>Apache DataFusion Blog -
blog</title><link href="https://datafusion.apache.org/blog/";
rel="alternate"></link><link
href="https://datafusion.apache.org/blog/feeds/blog.atom.xml";
rel="self"></link><id>https://datafusion.apache.org/blog/</id><updated>2025-11-25T00:00:00+00:00</updated><subtitle></subtitle><entry><title>Apache
DataFusion 51.0.0 Released</title><link
href="https://datafusion.apache.org/blog/2025/11/25/datafusion-51.0.0"; rel="al
[...]
+<feed xmlns="http://www.w3.org/2005/Atom";><title>Apache DataFusion Blog -
blog</title><link href="https://datafusion.apache.org/blog/";
rel="alternate"></link><link
href="https://datafusion.apache.org/blog/feeds/blog.atom.xml";
rel="self"></link><id>https://datafusion.apache.org/blog/</id><updated>2025-12-04T00:00:00+00:00</updated><subtitle></subtitle><entry><title>Apache
DataFusion Comet 0.12.0 Release</title><link
href="https://datafusion.apache.org/blog/2025/12/04/datafusion-comet-0.12 [...]
+{% 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 %}
+-->
+
+<p>The Apache DataFusion PMC is pleased to announce version 0.12.0 of
the <a href="https://datafusion.apache.org/comet/">Comet</a>
subproject.</p>
+<p>Comet is an accelerator for Apache Spark that translates Spark
physical plans to DataFusion physical plans for
+improved performance and efficiency without requiring any code
changes.</p>
+<p>This release covers approximately four weeks of development
…</p></summary><content type="html"><!--
+{% 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 %}
+-->
+
+<p>The Apache DataFusion PMC is pleased to announce version 0.12.0 of
the <a href="https://datafusion.apache.org/comet/">Comet</a>
subproject.</p>
+<p>Comet is an accelerator for Apache Spark that translates Spark
physical plans to DataFusion physical plans for
+improved performance and efficiency without requiring any code
changes.</p>
+<p>This release covers approximately four weeks of development work and
is the result of merging 105 PRs from 13
+contributors. See the <a
href="https://github.com/apache/datafusion-comet/blob/main/dev/changelog/0.12.0.md">change
log</a> for more information.</p>
+<h2 id="release-highlights">Release Highlights<a class="headerlink"
href="#release-highlights" title="Permanent link">¶</a></h2>
+<h3 id="experimental-native-apache-iceberg-scan-support">Experimental
Native Apache Iceberg Scan Support<a class="headerlink"
href="#experimental-native-apache-iceberg-scan-support" title="Permanent
link">¶</a></h3>
+<p>Comet has a new, experimental, <a
href="https://github.com/apache/datafusion-comet/pull/2528">native Iceberg
scan</a>. This work relies on <a
href="https://github.com/apache/iceberg-rust">iceberg-rust</a> and the
Parquet reader from <a
href="https://github.com/apache/arrow-rs">arrow-rs</a> that Comet
already uses to great effect. Comet’s <a
href="https://datafusion.apache.org/comet/user-guide/0.12/iceberg.html">existing
Iceberg integrati [...]
+<p>This represents a significant step forward in Comet's support for
data lakehouse architectures and expands the range of workloads that can
benefit from native acceleration. Please take a look at the PR and Comet’s
documentation to understand the current limitations and try it on your
workloads! We are eager for feedback on this approach.</p>
+<h3 id="code-architecture-improvements">Code Architecture
Improvements<a class="headerlink" href="#code-architecture-improvements"
title="Permanent link">¶</a></h3>
+<p>This release includes significant refactoring to improve code
maintainability and extensibility, and we will continue those efforts into
0.13.0 development:</p>
+<ul>
+<li><strong>Unified operator serialization</strong>: The
<a
href="https://github.com/apache/datafusion-comet/pull/2768">CometExecRule
refactor</a> unifies CometNativeExec creation with serialization through
the new <code>CometOperatorSerde</code> trait</li>
+<li><strong>Expression serde refactoring</strong>: Multiple
PRs (<a
href="https://github.com/apache/datafusion-comet/pull/2738">#2738</a>,
<a
href="https://github.com/apache/datafusion-comet/pull/2741">#2741</a>,
<a
href="https://github.com/apache/datafusion-comet/pull/2791">#2791</a>)
moved expression serialization logic out of
<code>QueryPlanSerde</code> into specialized traits</li>
+<li><strong>Aggregate expression improvements</strong>:
<a href="https://github.com/apache/datafusion-comet/pull/2777">Added
getSupportLevel to CometAggregateExpressionSerde trait</a> for better
aggregate function handling</li>
+</ul>
+<p>These architectural improvements make it easier for contributors to
add new operators and expressions while reducing code complexity.</p>
+<h3 id="new-sql-functions">New SQL Functions<a class="headerlink"
href="#new-sql-functions" title="Permanent link">¶</a></h3>
+<p>The following SQL functions are now supported:</p>
+<ul>
+<li><a
href="https://github.com/apache/datafusion-comet/pull/2604"><code>concat</code></a>
- String concatenation</li>
+<li><a
href="https://github.com/apache/datafusion-comet/pull/2689"><code>abs</code></a>
- Absolute value</li>
+<li><a
href="https://github.com/apache/datafusion-comet/pull/2471"><code>sha1</code></a>
- SHA-1 hash function</li>
+<li><a
href="https://github.com/apache/datafusion-comet/pull/2755"><code>cot</code></a>
- Cotangent function</li>
+<li><a
href="https://github.com/apache/datafusion-comet/pull/2784">Hyperbolic
trigonometric functions</a> - sinh, cosh, tanh, and their inverse
functions</li>
+</ul>
+<h3 id="new-operators">New Operators<a class="headerlink"
href="#new-operators" title="Permanent link">¶</a></h3>
+<ul>
+<li><a
href="https://github.com/apache/datafusion-comet/pull/2735"><code>CometLocalTableScanExec</code></a>
- Native support for local table scans, eliminating fallback to Spark for
small, in-memory datasets</li>
+</ul>
+<h3 id="configuration-and-usability-improvements">Configuration and
Usability Improvements<a class="headerlink"
href="#configuration-and-usability-improvements" title="Permanent
link">¶</a></h3>
+<ul>
+<li><strong>Simplified on-heap configuration</strong>: <a
href="https://github.com/apache/datafusion-comet/pull/2599">Simplified
on-heap memory configuration</a> for easier setup</li>
+<li><strong>Extended explain format</strong>: <a
href="https://github.com/apache/datafusion-comet/pull/2644">Renamed and
improved COMET_EXTENDED_EXPLAIN_FORMAT</a> with better defaults</li>
+<li><strong>Environment variable support</strong>: <a
href="https://github.com/apache/datafusion-comet/pull/2722">Improved
framework for setting configs with environment variables</a></li>
+<li><strong>Native config passing</strong>: <a
href="https://github.com/apache/datafusion-comet/pull/2801">All Comet
configs now passed to native plan</a></li>
+<li><strong>Config categorization</strong>: <a
href="https://github.com/apache/datafusion-comet/pull/2740">Categorized
testing configs</a> and added notes about known timezone issues</li>
+<li><strong>Removed legacy configs</strong>: <a
href="https://github.com/apache/datafusion-comet/pull/2786">Removed
COMET_EXPR_ALLOW_INCOMPATIBLE config</a> to simplify
configuration</li>
+</ul>
+<h3 id="bug-fixes">Bug Fixes<a class="headerlink" href="#bug-fixes"
title="Permanent link">¶</a></h3>
+<p>This release includes numerous bug fixes:</p>
+<ul>
+<li><a
href="https://github.com/apache/datafusion-comet/pull/2606">Fixed None.get
in stringDecode</a> when binary child cannot be converted</li>
+<li><a
href="https://github.com/apache/datafusion-comet/pull/2630">Proper fallback
for lpad/rpad with unsupported arguments</a></li>
+<li><a
href="https://github.com/apache/datafusion-comet/pull/2634">Fixed
trunc/date_trunc with unsupported format strings</a></li>
+<li><a
href="https://github.com/apache/datafusion-comet/pull/2675">Corrected single
partition handling in native_datafusion</a></li>
+<li><a
href="https://github.com/apache/datafusion-comet/pull/2687">Fixed LeftSemi
join handling</a> - do not replace SMJ with HJ</li>
+<li><a
href="https://github.com/apache/datafusion-comet/pull/2718">Fixed
CometLiteral class cast exception with arrays</a></li>
+<li><a
href="https://github.com/apache/datafusion-comet/pull/2716">Fixed missing
SortOrder fallback reason in range partitioning</a></li>
+<li><a
href="https://github.com/apache/datafusion-comet/pull/2728">Improved
checkSparkMaybeThrows to compare results in success case</a></li>
+<li><a
href="https://github.com/apache/datafusion-comet/pull/2643">Fixed null
handling in CometVector implementations</a></li>
+</ul>
+<h3 id="documentation-improvements">Documentation Improvements<a
class="headerlink" href="#documentation-improvements" title="Permanent
link">¶</a></h3>
+<ul>
+<li><a
href="https://github.com/apache/datafusion-comet/pull/2668">Added FFI
documentation to contributor guide</a></li>
+<li><a
href="https://github.com/apache/datafusion-comet/pull/2704">Updated
contributor guide for adding new expressions</a> and <a
href="https://github.com/apache/datafusion-comet/pull/2758">operators</a></li>
+<li><a
href="https://github.com/apache/datafusion-comet/pull/2587">Improved
documentation layout</a> and <a
href="https://github.com/apache/datafusion-comet/pull/2597">navigation</a></li>
+<li><a
href="https://github.com/apache/datafusion-comet/pull/2783">Added prettier
enforcement</a> for consistent markdown formatting</li>
+<li><a
href="https://github.com/apache/datafusion-comet/pull/2779">CI check to
ensure generated docs are in sync</a></li>
+<li>Various documentation updates for <a
href="https://github.com/apache/datafusion-comet/pull/2694">SortOrder
expressions</a>, <a
href="https://github.com/apache/datafusion-comet/pull/2742">LocalTableScan
and WindowExec</a>, and <a
href="https://github.com/apache/datafusion-comet/pull/2712">Spark SQL
tests</a></li>
+</ul>
+<h3 id="dependency-updates">Dependency Updates<a class="headerlink"
href="#dependency-updates" title="Permanent link">¶</a></h3>
+<ul>
+<li><a
href="https://github.com/apache/datafusion-comet/pull/2574">Upgraded to
Spark 3.5.7</a></li>
+<li><a
href="https://github.com/apache/datafusion-comet/pull/2605">Upgraded to
DataFusion 50.3.0</a></li>
+<li><a
href="https://github.com/apache/datafusion-comet/pull/2608">Upgraded Parquet
from 56.0.0 to 56.2.0</a></li>
+<li>Various other dependency updates via Dependabot</li>
+</ul>
+<h3 id="spark-compatibility">Spark Compatibility<a class="headerlink"
href="#spark-compatibility" title="Permanent link">¶</a></h3>
+<ul>
+<li>Spark 3.4.3 with JDK 11 &amp; 17, Scala 2.12 &amp;
2.13</li>
+<li>Spark 3.5.4 through 3.5.7 with JDK 11 &amp; 17, Scala 2.12
&amp; 2.13</li>
+<li>Spark 4.0.1 with JDK 17, Scala 2.13</li>
+</ul>
+<p>We are looking for help from the community to fully support Spark
4.0.1. See <a
href="https://github.com/apache/datafusion-comet/issues/1637">EPIC: Support
4.0.0</a> for more information.</p>
+<h2 id="getting-involved">Getting Involved<a class="headerlink"
href="#getting-involved" title="Permanent link">¶</a></h2>
+<p>The Comet project welcomes new contributors. We use the same <a
href="https://datafusion.apache.org/contributor-guide/communication.html#slack-and-discord">Slack
and Discord</a> channels as the main DataFusion
+project and have a weekly <a
href="https://docs.google.com/document/d/1NBpkIAuU7O9h8Br5CbFksDhX-L9TyO9wmGLPMe0Plc8/edit?usp=sharing">DataFusion
video call</a>.</p>
+<p>The easiest way to get involved is to test Comet with your current
Spark jobs and file issues for any bugs or
+performance regressions that you find. See the <a
href="https://datafusion.apache.org/comet/user-guide/installation.html">Getting
Started</a> guide for instructions on downloading and installing
+Comet.</p>
+<p>There are also many <a
href="https://github.com/apache/datafusion-comet/contribute">good first
issues</a> waiting for contributions.</p></content><category
term="blog"></category></entry><entry><title>Apache DataFusion 51.0.0
Released</title><link
href="https://datafusion.apache.org/blog/2025/11/25/datafusion-51.0.0";
rel="alternate"></link><published>2025-11-25T00:00:00+00:00</published><updated>2025-11-25T00:00:00+00:00</updated><author><name>pmc</name></autho
[...]
{% comment %}
Licensed to the Apache Software Foundation (ASF) under one or more
contributor license agreements. See the NOTICE file distributed with
diff --git a/output/feeds/pmc.atom.xml b/output/feeds/pmc.atom.xml
index d60f9ed..4604284 100644
--- a/output/feeds/pmc.atom.xml
+++ b/output/feeds/pmc.atom.xml
@@ -1,5 +1,127 @@
<?xml version="1.0" encoding="utf-8"?>
-<feed xmlns="http://www.w3.org/2005/Atom";><title>Apache DataFusion Blog -
pmc</title><link href="https://datafusion.apache.org/blog/";
rel="alternate"></link><link
href="https://datafusion.apache.org/blog/feeds/pmc.atom.xml";
rel="self"></link><id>https://datafusion.apache.org/blog/</id><updated>2025-11-25T00:00:00+00:00</updated><subtitle></subtitle><entry><title>Apache
DataFusion 51.0.0 Released</title><link
href="https://datafusion.apache.org/blog/2025/11/25/datafusion-51.0.0";
rel="alte [...]
+<feed xmlns="http://www.w3.org/2005/Atom";><title>Apache DataFusion Blog -
pmc</title><link href="https://datafusion.apache.org/blog/";
rel="alternate"></link><link
href="https://datafusion.apache.org/blog/feeds/pmc.atom.xml";
rel="self"></link><id>https://datafusion.apache.org/blog/</id><updated>2025-12-04T00:00:00+00:00</updated><subtitle></subtitle><entry><title>Apache
DataFusion Comet 0.12.0 Release</title><link
href="https://datafusion.apache.org/blog/2025/12/04/datafusion-comet-0.12.0
[...]
+{% 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 %}
+-->
+
+<p>The Apache DataFusion PMC is pleased to announce version 0.12.0 of
the <a href="https://datafusion.apache.org/comet/">Comet</a>
subproject.</p>
+<p>Comet is an accelerator for Apache Spark that translates Spark
physical plans to DataFusion physical plans for
+improved performance and efficiency without requiring any code
changes.</p>
+<p>This release covers approximately four weeks of development
…</p></summary><content type="html"><!--
+{% 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 %}
+-->
+
+<p>The Apache DataFusion PMC is pleased to announce version 0.12.0 of
the <a href="https://datafusion.apache.org/comet/">Comet</a>
subproject.</p>
+<p>Comet is an accelerator for Apache Spark that translates Spark
physical plans to DataFusion physical plans for
+improved performance and efficiency without requiring any code
changes.</p>
+<p>This release covers approximately four weeks of development work and
is the result of merging 105 PRs from 13
+contributors. See the <a
href="https://github.com/apache/datafusion-comet/blob/main/dev/changelog/0.12.0.md">change
log</a> for more information.</p>
+<h2 id="release-highlights">Release Highlights<a class="headerlink"
href="#release-highlights" title="Permanent link">¶</a></h2>
+<h3 id="experimental-native-apache-iceberg-scan-support">Experimental
Native Apache Iceberg Scan Support<a class="headerlink"
href="#experimental-native-apache-iceberg-scan-support" title="Permanent
link">¶</a></h3>
+<p>Comet has a new, experimental, <a
href="https://github.com/apache/datafusion-comet/pull/2528">native Iceberg
scan</a>. This work relies on <a
href="https://github.com/apache/iceberg-rust">iceberg-rust</a> and the
Parquet reader from <a
href="https://github.com/apache/arrow-rs">arrow-rs</a> that Comet
already uses to great effect. Comet’s <a
href="https://datafusion.apache.org/comet/user-guide/0.12/iceberg.html">existing
Iceberg integrati [...]
+<p>This represents a significant step forward in Comet's support for
data lakehouse architectures and expands the range of workloads that can
benefit from native acceleration. Please take a look at the PR and Comet’s
documentation to understand the current limitations and try it on your
workloads! We are eager for feedback on this approach.</p>
+<h3 id="code-architecture-improvements">Code Architecture
Improvements<a class="headerlink" href="#code-architecture-improvements"
title="Permanent link">¶</a></h3>
+<p>This release includes significant refactoring to improve code
maintainability and extensibility, and we will continue those efforts into
0.13.0 development:</p>
+<ul>
+<li><strong>Unified operator serialization</strong>: The
<a
href="https://github.com/apache/datafusion-comet/pull/2768">CometExecRule
refactor</a> unifies CometNativeExec creation with serialization through
the new <code>CometOperatorSerde</code> trait</li>
+<li><strong>Expression serde refactoring</strong>: Multiple
PRs (<a
href="https://github.com/apache/datafusion-comet/pull/2738">#2738</a>,
<a
href="https://github.com/apache/datafusion-comet/pull/2741">#2741</a>,
<a
href="https://github.com/apache/datafusion-comet/pull/2791">#2791</a>)
moved expression serialization logic out of
<code>QueryPlanSerde</code> into specialized traits</li>
+<li><strong>Aggregate expression improvements</strong>:
<a href="https://github.com/apache/datafusion-comet/pull/2777">Added
getSupportLevel to CometAggregateExpressionSerde trait</a> for better
aggregate function handling</li>
+</ul>
+<p>These architectural improvements make it easier for contributors to
add new operators and expressions while reducing code complexity.</p>
+<h3 id="new-sql-functions">New SQL Functions<a class="headerlink"
href="#new-sql-functions" title="Permanent link">¶</a></h3>
+<p>The following SQL functions are now supported:</p>
+<ul>
+<li><a
href="https://github.com/apache/datafusion-comet/pull/2604"><code>concat</code></a>
- String concatenation</li>
+<li><a
href="https://github.com/apache/datafusion-comet/pull/2689"><code>abs</code></a>
- Absolute value</li>
+<li><a
href="https://github.com/apache/datafusion-comet/pull/2471"><code>sha1</code></a>
- SHA-1 hash function</li>
+<li><a
href="https://github.com/apache/datafusion-comet/pull/2755"><code>cot</code></a>
- Cotangent function</li>
+<li><a
href="https://github.com/apache/datafusion-comet/pull/2784">Hyperbolic
trigonometric functions</a> - sinh, cosh, tanh, and their inverse
functions</li>
+</ul>
+<h3 id="new-operators">New Operators<a class="headerlink"
href="#new-operators" title="Permanent link">¶</a></h3>
+<ul>
+<li><a
href="https://github.com/apache/datafusion-comet/pull/2735"><code>CometLocalTableScanExec</code></a>
- Native support for local table scans, eliminating fallback to Spark for
small, in-memory datasets</li>
+</ul>
+<h3 id="configuration-and-usability-improvements">Configuration and
Usability Improvements<a class="headerlink"
href="#configuration-and-usability-improvements" title="Permanent
link">¶</a></h3>
+<ul>
+<li><strong>Simplified on-heap configuration</strong>: <a
href="https://github.com/apache/datafusion-comet/pull/2599">Simplified
on-heap memory configuration</a> for easier setup</li>
+<li><strong>Extended explain format</strong>: <a
href="https://github.com/apache/datafusion-comet/pull/2644">Renamed and
improved COMET_EXTENDED_EXPLAIN_FORMAT</a> with better defaults</li>
+<li><strong>Environment variable support</strong>: <a
href="https://github.com/apache/datafusion-comet/pull/2722">Improved
framework for setting configs with environment variables</a></li>
+<li><strong>Native config passing</strong>: <a
href="https://github.com/apache/datafusion-comet/pull/2801">All Comet
configs now passed to native plan</a></li>
+<li><strong>Config categorization</strong>: <a
href="https://github.com/apache/datafusion-comet/pull/2740">Categorized
testing configs</a> and added notes about known timezone issues</li>
+<li><strong>Removed legacy configs</strong>: <a
href="https://github.com/apache/datafusion-comet/pull/2786">Removed
COMET_EXPR_ALLOW_INCOMPATIBLE config</a> to simplify
configuration</li>
+</ul>
+<h3 id="bug-fixes">Bug Fixes<a class="headerlink" href="#bug-fixes"
title="Permanent link">¶</a></h3>
+<p>This release includes numerous bug fixes:</p>
+<ul>
+<li><a
href="https://github.com/apache/datafusion-comet/pull/2606">Fixed None.get
in stringDecode</a> when binary child cannot be converted</li>
+<li><a
href="https://github.com/apache/datafusion-comet/pull/2630">Proper fallback
for lpad/rpad with unsupported arguments</a></li>
+<li><a
href="https://github.com/apache/datafusion-comet/pull/2634">Fixed
trunc/date_trunc with unsupported format strings</a></li>
+<li><a
href="https://github.com/apache/datafusion-comet/pull/2675">Corrected single
partition handling in native_datafusion</a></li>
+<li><a
href="https://github.com/apache/datafusion-comet/pull/2687">Fixed LeftSemi
join handling</a> - do not replace SMJ with HJ</li>
+<li><a
href="https://github.com/apache/datafusion-comet/pull/2718">Fixed
CometLiteral class cast exception with arrays</a></li>
+<li><a
href="https://github.com/apache/datafusion-comet/pull/2716">Fixed missing
SortOrder fallback reason in range partitioning</a></li>
+<li><a
href="https://github.com/apache/datafusion-comet/pull/2728">Improved
checkSparkMaybeThrows to compare results in success case</a></li>
+<li><a
href="https://github.com/apache/datafusion-comet/pull/2643">Fixed null
handling in CometVector implementations</a></li>
+</ul>
+<h3 id="documentation-improvements">Documentation Improvements<a
class="headerlink" href="#documentation-improvements" title="Permanent
link">¶</a></h3>
+<ul>
+<li><a
href="https://github.com/apache/datafusion-comet/pull/2668">Added FFI
documentation to contributor guide</a></li>
+<li><a
href="https://github.com/apache/datafusion-comet/pull/2704">Updated
contributor guide for adding new expressions</a> and <a
href="https://github.com/apache/datafusion-comet/pull/2758">operators</a></li>
+<li><a
href="https://github.com/apache/datafusion-comet/pull/2587">Improved
documentation layout</a> and <a
href="https://github.com/apache/datafusion-comet/pull/2597">navigation</a></li>
+<li><a
href="https://github.com/apache/datafusion-comet/pull/2783">Added prettier
enforcement</a> for consistent markdown formatting</li>
+<li><a
href="https://github.com/apache/datafusion-comet/pull/2779">CI check to
ensure generated docs are in sync</a></li>
+<li>Various documentation updates for <a
href="https://github.com/apache/datafusion-comet/pull/2694">SortOrder
expressions</a>, <a
href="https://github.com/apache/datafusion-comet/pull/2742">LocalTableScan
and WindowExec</a>, and <a
href="https://github.com/apache/datafusion-comet/pull/2712">Spark SQL
tests</a></li>
+</ul>
+<h3 id="dependency-updates">Dependency Updates<a class="headerlink"
href="#dependency-updates" title="Permanent link">¶</a></h3>
+<ul>
+<li><a
href="https://github.com/apache/datafusion-comet/pull/2574">Upgraded to
Spark 3.5.7</a></li>
+<li><a
href="https://github.com/apache/datafusion-comet/pull/2605">Upgraded to
DataFusion 50.3.0</a></li>
+<li><a
href="https://github.com/apache/datafusion-comet/pull/2608">Upgraded Parquet
from 56.0.0 to 56.2.0</a></li>
+<li>Various other dependency updates via Dependabot</li>
+</ul>
+<h3 id="spark-compatibility">Spark Compatibility<a class="headerlink"
href="#spark-compatibility" title="Permanent link">¶</a></h3>
+<ul>
+<li>Spark 3.4.3 with JDK 11 &amp; 17, Scala 2.12 &amp;
2.13</li>
+<li>Spark 3.5.4 through 3.5.7 with JDK 11 &amp; 17, Scala 2.12
&amp; 2.13</li>
+<li>Spark 4.0.1 with JDK 17, Scala 2.13</li>
+</ul>
+<p>We are looking for help from the community to fully support Spark
4.0.1. See <a
href="https://github.com/apache/datafusion-comet/issues/1637">EPIC: Support
4.0.0</a> for more information.</p>
+<h2 id="getting-involved">Getting Involved<a class="headerlink"
href="#getting-involved" title="Permanent link">¶</a></h2>
+<p>The Comet project welcomes new contributors. We use the same <a
href="https://datafusion.apache.org/contributor-guide/communication.html#slack-and-discord">Slack
and Discord</a> channels as the main DataFusion
+project and have a weekly <a
href="https://docs.google.com/document/d/1NBpkIAuU7O9h8Br5CbFksDhX-L9TyO9wmGLPMe0Plc8/edit?usp=sharing">DataFusion
video call</a>.</p>
+<p>The easiest way to get involved is to test Comet with your current
Spark jobs and file issues for any bugs or
+performance regressions that you find. See the <a
href="https://datafusion.apache.org/comet/user-guide/installation.html">Getting
Started</a> guide for instructions on downloading and installing
+Comet.</p>
+<p>There are also many <a
href="https://github.com/apache/datafusion-comet/contribute">good first
issues</a> waiting for contributions.</p></content><category
term="blog"></category></entry><entry><title>Apache DataFusion 51.0.0
Released</title><link
href="https://datafusion.apache.org/blog/2025/11/25/datafusion-51.0.0";
rel="alternate"></link><published>2025-11-25T00:00:00+00:00</published><updated>2025-11-25T00:00:00+00:00</updated><author><name>pmc</name></autho
[...]
{% comment %}
Licensed to the Apache Software Foundation (ASF) under one or more
contributor license agreements. See the NOTICE file distributed with
diff --git a/output/feeds/pmc.rss.xml b/output/feeds/pmc.rss.xml
index f274e27..01bea08 100644
--- a/output/feeds/pmc.rss.xml
+++ b/output/feeds/pmc.rss.xml
@@ -1,5 +1,27 @@
<?xml version="1.0" encoding="utf-8"?>
-<rss version="2.0"><channel><title>Apache DataFusion Blog -
pmc</title><link>https://datafusion.apache.org/blog/</link><description></description><lastBuildDate>Tue,
25 Nov 2025 00:00:00 +0000</lastBuildDate><item><title>Apache DataFusion
51.0.0
Released</title><link>https://datafusion.apache.org/blog/2025/11/25/datafusion-51.0.0</link><description><!--
+<rss version="2.0"><channel><title>Apache DataFusion Blog -
pmc</title><link>https://datafusion.apache.org/blog/</link><description></description><lastBuildDate>Thu,
04 Dec 2025 00:00:00 +0000</lastBuildDate><item><title>Apache DataFusion Comet
0.12.0
Release</title><link>https://datafusion.apache.org/blog/2025/12/04/datafusion-comet-0.12.0</link><description><!--
+{% 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 %}
+-->
+
+<p>The Apache DataFusion PMC is pleased to announce version 0.12.0 of
the <a href="https://datafusion.apache.org/comet/">Comet</a>
subproject.</p>
+<p>Comet is an accelerator for Apache Spark that translates Spark
physical plans to DataFusion physical plans for
+improved performance and efficiency without requiring any code
changes.</p>
+<p>This release covers approximately four weeks of development
…</p></description><dc:creator
xmlns:dc="http://purl.org/dc/elements/1.1/";>pmc</dc:creator><pubDate>Thu, 04
Dec 2025 00:00:00 +0000</pubDate><guid
isPermaLink="false">tag:datafusion.apache.org,2025-12-04:/blog/2025/12/04/datafusion-comet-0.12.0</guid><category>blog</category></item><item><title>Apache
DataFusion 51.0.0
Released</title><link>https://datafusion.apache.org/blog/2025/11/25/datafusion-51.0.0</link><des
[...]
{% comment %}
Licensed to the Apache Software Foundation (ASF) under one or more
contributor license agreements. See the NOTICE file distributed with
diff --git a/output/index.html b/output/index.html
index fd7df6e..784ef17 100644
--- a/output/index.html
+++ b/output/index.html
@@ -45,6 +45,47 @@
<p><i>Here you can find the latest updates from DataFusion and
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+ <h1><a
href="/blog/2025/12/04/datafusion-comet-0.12.0">Apache DataFusion Comet 0.12.0
Release</a></h1>
+ <p>Posted on: Thu 04 December 2025 by pmc</p>
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+
+<p>The Apache DataFusion PMC is pleased to announce version 0.12.0 of the <a
href="https://datafusion.apache.org/comet/";>Comet</a> subproject.</p>
+<p>Comet is an accelerator for Apache Spark that translates Spark physical
plans to DataFusion physical plans for
+improved performance and efficiency without requiring any code changes.</p>
+<p>This release covers approximately four weeks of development …</p></p>
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