zanmato1984 commented on code in PR #667:
URL: https://github.com/apache/arrow-site/pull/667#discussion_r2206155611
##########
_posts/2025-07-07-recent-improvements-to-hash-join.md:
##########
@@ -0,0 +1,151 @@
+---
+layout: post
+title: "Recent Improvements to Hash Join in Arrow C++"
+description: "A deep dive into recent improvements to Apache Arrow’s hash join
implementation — enhancing stability, memory efficiency, and parallel
performance for modern analytic workloads."
+date: "2025-07-07 00:00:00"
+author: zanmato
+categories: [application]
+---
+<!--
+{% 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 %}
+-->
+
+*Edited by Apache Arrow PMC.*
+
+*Editor’s Note: Apache Arrow is an expansive project, ranging from the Arrow
columnar format itself, to its numerous specifications, and a long list of
implementations. Arrow is also an expansive project in terms of its community
of contributors. In this blog post, we’d like to highlight recent work by
Apache Arrow Committer Rossi Sun on improving the performance and stability of
Arrow’s embeddable query execution engine: Acero.*
+
+# Introduction
+
+Hash join is a fundamental operation in analytical processing engines. In the
C++ implementation of Apache Arrow, the hash join is implemented in the C++
engine Acero, which powers query execution in bindings like PyArrow and the R
Arrow package. Even if you haven't used Acero directly, your code may already
be benefiting from it under the hood.
Review Comment:
```suggestion
Hash join is a fundamental operation in analytical processing engines — it
matches rows from two tables based on key values using a hash table for fast
lookup. In the C++ implementation of Apache Arrow, the hash join is implemented
in the C++ engine Acero, which powers query execution in bindings like PyArrow
and the R Arrow package. Even if you haven't used Acero directly, your code may
already be benefiting from it under the hood.
```
--
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
To unsubscribe, e-mail: commits-unsubscr...@arrow.apache.org
For queries about this service, please contact Infrastructure at:
us...@infra.apache.org
