The Apache DataFusion PMC is pleased to announce version 1.2.0 of the Comet subproject. 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. This release covers roughly five weeks of development …

Apache DataFusion Comet tracked its performance with TPC-H and TPC-DS, and the numbers were encouraging. Real user pipelines showed smaller gains, or none at all. What those pipelines had in common was nested data, which neither benchmark contains. To measure that gap, we built nested TPC-H. At scale factor 1000 …

This blog post covers different techniques to improve the performance of point queries in DataFusion. It is based on a talk (slides, recording) given at the Boston DataFusion meetup, in September 2026. Introduction¶ While DataFusion is commonly seen as an engine to run analytical workloads -- which are comprised by queries …

We are pleased to announce version 55.0.0 of Apache DataFusion Ballista. Ballista is a distributed query execution engine that enhances Apache DataFusion by enabling parallel execution of workloads across multiple nodes. This release contains 322 commits from 25 contributors. It builds on 54.1.0, upgrades to DataFusion …

The Apache DataFusion PMC is pleased to announce version 1.1.0 of the Comet subproject. 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. This release covers roughly seven weeks of development …

We are proud to announce the release of DataFusion 55.0.0. This post highlights some of the many improvements since DataFusion 54.0.0, such as significant performance increases, range partitioning, MERGE INTO support, and runtime row-group pruning. The complete list of changes is available in the changelog. This …

We are pleased to announce version 54.1.0 of Apache DataFusion Ballista. Ballista is a distributed query execution engine that enhances Apache DataFusion by enabling parallel execution of workloads across multiple nodes. This is a patch release, consisting of 10 commits from 3 contributors. It follows 54.0.0 …

The Apache DataFusion PMC is pleased to announce version 1.0.0 of the Comet subproject. 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. This release covers roughly six weeks of development …

Qi Zhu (Massive); Andrew Lamb (InfluxData) Apache DataFusion uses sortedness automatically — even when data is only partially sorted or when no ordering was declared. This post explains how plan-time sort pushdown, runtime scan reordering, and row-group pruning driven by dynamic filters make that possible. Are Real Datasets Sorted?¶ Sorting data …

We are pleased to announce version 54.0.0 of Apache DataFusion Ballista. Ballista is a distributed query execution engine that enhances Apache DataFusion by enabling parallel execution of workloads across multiple nodes. This release consists of 171 commits from 11 contributors. It follows 53.0.0, and continues the …

The Apache DataFusion PMC is pleased to announce version 0.17.0 of the Comet subproject. This release covers approximately five weeks of development work and is the result of merging 192 PRs from 19 contributors. See the change log for more information. Fewer Fallbacks to Spark¶ The headline feature …

We are proud to announce the release of DataFusion 54.0.0. This post highlights some of the major improvements since DataFusion 53.0.0. Notable additions include LATERAL joins, SQL lambda functions, and a new Avro reader, alongside significant join, scan, and planning performance improvements. The complete list of …

Introduction¶ Apache Spark workloads are some of the most common and cost-intensive jobs running on Kubernetes. Our customers at AWS are always on the lookout for meaningful speedups, since any speedup translates directly into lower bills. That's what got us interested in Apache DataFusion Comet. The local TPC-DS and TPC-H …

If you maintain an open source project, a growing fraction of people using your library are not typing code anymore — they are asking an agent to write it for them. That agent leans on whatever it picked up during training, which is rarely the idiomatic style your project actually wants …

We are pleased to announce the 0.1.0 release of Apache DataFusion Java, the first release of the project. DataFusion Java is a thin Java binding over the Apache DataFusion query engine: SQL and DataFrame queries are planned and executed in native Rust, and results return to the JVM …

We are pleased to announce version 53.0.0 of Apache DataFusion Ballista. Ballista is a distributed query execution engine that enhances Apache DataFusion by enabling parallel execution of workloads across multiple nodes. The last Ballista blog post covered 43.0.0, released in January 2025. In the year and …

The Apache DataFusion PMC is pleased to announce version 0.16.0 of the Comet subproject. 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. This release covers approximately three weeks of development …

The Apache DataFusion PMC is pleased to announce version 0.15.0 of the Comet subproject. 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. This release covers approximately four weeks of development …

We are proud to announce the release of DataFusion 53.0.0. This post highlights some of the major improvements since DataFusion 52.0.0. The complete list of changes is available in the changelog. Thanks to the 114 contributors for making this release possible. Performance Improvements 🚀¶ Figure 1: Average …

One of DataFusion's greatest strengths is its extensibility. If your data lives in a custom format, behind an API, or in a system that DataFusion does not natively support, you can teach DataFusion to read it by implementing a custom table provider. This post walks through the three layers you …

Xudong Wang, Massive Reading data efficiently means touching as little data as possible. The fastest I/O is the I/O you never make …

The Apache DataFusion PMC is pleased to announce version 0.14.0 of the Comet subproject. 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. This release covers approximately eight weeks of development …

SQL's CASE expression is one of the few explicit conditional evaluation constructs the language provides. It allows you to control which expression from a …

The Apache DataFusion PMC is pleased to announce version 0.13.0 of the Comet subproject. 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. This release covers approximately eight weeks of development …

We are proud to announce the release of DataFusion 52.0.0. This post highlights some of the major improvements since DataFusion 51.0.0. The complete list of changes is available in the changelog. Thanks to the 121 contributors for making this release possible. Performance Improvements 🚀¶ We continue to …

If you embed DataFusion in your product, your users will eventually run SQL that DataFusion does not recognize. Not because the query is unreasonable, but because SQL in practice includes many dialects and system-specific statements. Suppose you store data as Parquet files on S3 and want users to attach an …

Databases are some of the most complex yet interesting pieces of software. They are amazing pieces of abstraction: query engines optimize and execute complex plans, storage engines provide sophisticated infrastructure as the backbone of the system, while intricate file formats lay the groundwork for particular workloads. All of this is …

The Apache DataFusion PMC is pleased to announce version 0.12.0 of the Comet subproject. 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. This release covers approximately four weeks of development …

Introduction¶ We are proud to announce the release of DataFusion 51.0.0. This post highlights some of the major improvements since DataFusion 50.0.0. The complete list of changes is available in the changelog. Thanks to the 128 contributors for making this release possible. Performance Improvements 🚀¶ We continue …

The Apache DataFusion PMC is pleased to announce version 0.11.0 of the Comet subproject. 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. This release covers approximately five weeks of development …

Introduction¶ We are proud to announce the release of DataFusion 50.0.0. This blog post highlights some of the major improvements since the release of DataFusion 49.0.0. The complete list of changes is available in the changelog. Thanks to numerous contributors for making this release possible! Performance …

Apache DataFusion significantly improves support for user defined types and metadata. The user defined function APIs let users access metadata on the input columns to functions and produce metadata in the output. User defined types == extension types¶ DataFusion directly uses Apache Arrow's DataTypes as its type system. This has …

The Apache DataFusion PMC is pleased to announce version 0.10.0 of the Comet subproject. 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. This release covers approximately ten weeks of development …

This blog post introduces the query engine optimization techniques called TopK and dynamic filters. We describe the motivating use case, how these optimizations work, and how we implemented them with the Apache DataFusion community to improve performance by an order of magnitude for some query patterns. Motivation and Results¶ The …

It is a common misconception that Apache Parquet requires (slow) reparsing of metadata and is limited to indexing structures provided by the format. In fact, caching parsed metadata and using custom external indexes along with Parquet's hierarchical data organization can significantly speed up query processing. In this blog, I describe …

Introduction¶ We are proud to announce the release of DataFusion 49.0.0. This blog post highlights some of the major improvements since the release of DataFusion 48.0.0. The complete list of changes is available in the changelog. Performance Improvements 🚀¶ DataFusion continues to focus on enhancing performance, as …

We’re excited to announce the release of Apache DataFusion 48.0.0! As always, this version packs in a wide range of improvements and fixes. You can find the complete details in the full changelog. We’ll highlight the most important changes below and guide you through upgrading. Breaking …

It’s a common misconception that Apache Parquet files are limited to basic Min/Max/Null Count statistics and Bloom filters, and that adding more advanced indexes requires changing the specification or creating a new file format. In fact, footer metadata and offset-based addressing already provide everything needed to embed …

We’re excited to announce the release of Apache DataFusion 47.0.0! 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. We’ll highlight the most important changes below …

The Apache DataFusion PMC is pleased to announce version 0.9.0 of the Comet subproject. 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. This release covers approximately ten weeks of development …

Have you ever tried to cancel a query that just wouldn't stop? In this post, we'll review how Rust's async programming model works, how …

Note: this blog was originally published on the InfluxData blog Introduction¶ Sometimes Query Optimizers are seen as a sort of black magic, “the most challenging problem in computer science,” according to Father Pavlo, or some behind-the-scenes player. We believe this perception is because: One must implement the rest of a …

Note, this blog was originally published on the InfluxData blog. In the first part of this post, we discussed what a Query Optimizer is, what role it plays, and described how industrial optimizers are organized. In this second post, we describe various optimizations that are found in Apache DataFusion and …

The Apache DataFusion PMC is pleased to announce version 0.8.0 of the Comet subproject. 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. This release covers approximately six weeks of development …

Window functions are a powerful feature in SQL, allowing for complex analytical computations over a subset of data. However, efficiently implementing them, especially sliding windows, can be quite challenging. With Apache DataFusion's user-defined window functions, developers can easily take advantage of all the effort put into DataFusion's...

TLDR: TPC-H SF=100 in 1min using tpchgen-rs vs 30min+ with dbgen. 3 members of the Apache DataFusion community used Rust and open source development to build tpchgen-rs, a fully open TPC-H data generator over 20x faster than any other implementation we know of. It is now possible to create …

We are happy to announce that datafusion-python 46.0.0 has been released. This release brings in all of the new features of the core DataFusion 46.0.0 library. Since the last blog post for datafusion-python 43.1.0, a large number of improvements have been made that can …

We’re excited to announce the release of Apache DataFusion 46.0.0! 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. We’ll highlight the most important changes below …

Editor's Note: This blog was first published on Xiangpeng Hao's blog. Thanks to InfluxData for sponsoring this work as part of his PhD funding. In the previous post …

The Apache DataFusion PMC is pleased to announce version 0.7.0 of the Comet subproject. 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. Comet runs on commodity hardware and aims to …

Editor's Note: This blog was first published on Xiangpeng Hao's blog. Thanks to InfluxData for sponsoring this work as part of his PhD funding. Apache Parquet has become the industry standard for storing columnar data, and reading Parquet efficiently -- especially from remote storage -- is crucial for query performance. Apache DataFusion …

Introduction¶ In this blog post, we explain when an ordering requirement of an operator is satisfied by its input data. This analysis is essential for order-based optimizations and is often more complex than one might initially think. Ordering Requirement for an operator describes how the input data to that operator …

Introduction¶ We are very proud to announce DataFusion 45.0.0. This blog highlights some of the many major improvements since we released DataFusion 40.0.0 and a preview of what the community is thinking about in the next 6 months. It has been an exciting period of development …

The Apache DataFusion PMC is pleased to announce version 0.6.0 of the Comet subproject. 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. Comet runs on commodity hardware and aims to …

We are pleased to announce version 43.0.0 of the DataFusion Ballista. Ballista allows existing DataFusion applications to be scaled out on a cluster for use cases that are not practical to run on a single node. Highlights of this release¶ Seamless Integration with DataFusion¶ The primary objective of …

The Apache DataFusion PMC is pleased to announce version 0.5.0 of the Comet subproject. 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. Comet runs on commodity hardware and aims to …

We are happy to announce that datafusion-python 43.1.0 has been released. This release brings in all of the new features of the core DataFusion 43.0.0 library. Since the last blog post for datafusion-python 40.1.0, a large number of improvements have been made that can …

The Apache DataFusion PMC is pleased to announce version 0.4.0 of the Comet subproject. 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. Comet runs on commodity hardware and aims to …

Personal Context¶ For a few months now I’ve been working with Apache DataFusion, a fast query engine written in Rust. From my experience the language that nearly all data scientists are working in is Python. In general, data scientists often use Pandas for in-memory tasks and PySpark for larger …

I am extremely excited to announce that Apache DataFusion is the fastest engine for querying Apache Parquet files in ClickBench. It is faster than DuckDB, chDB and Clickhouse using the same hardware. It also marks the first time a Rust-based engine holds the top spot, which has previously been …

The Apache DataFusion PMC is pleased to announce version 0.3.0 of the Comet subproject. 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. Comet runs on commodity hardware and aims to …

Editor's Note: This is the first of a two part blog series that was first published on the InfluxData blog. Thanks to InfluxData for sponsoring this work as Xiangpeng Hao's summer intern project This blog describes our experience implementing StringView in the Rust implementation of Apache Arrow, and integrating …

Editor's Note: This blog series was first published on the InfluxData blog. Thanks to InfluxData for sponsoring this work as Xiangpeng Hao's summer intern project In the first post, we discussed the nuances required to accelerate Parquet loading using StringViewArray by reusing buffers and reducing copies. In this second …

The Apache DataFusion PMC is pleased to announce version 0.2.0 of the Comet subproject. 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. Comet runs on commodity hardware and aims to …

Introduction¶ We are happy to announce that DataFusion in Python 40.1.0 has been released. In addition to bringing in all of the new features of the core DataFusion 40.0.0 package, this release contains significant updates to the user interface and documentation. We listened to the python …

Introduction¶ We are proud to announce DataFusion 40.0.0. This blog highlights some of the many major improvements since we released DataFusion 34.0.0 and a preview of what the community is thinking about in the next 6 months. We are hoping to make more regular blog posts …

The Apache DataFusion PMC is pleased to announce the first official source release of the Comet subproject. 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. Comet runs on commodity hardware and aims …

Introduction¶ TLDR; Apache Arrow DataFusion --> Apache DataFusion The Arrow PMC and newly created DataFusion PMC are happy to announce that as of April 16, 2024 the Apache Arrow DataFusion subproject is now a top level Apache Software Foundation project. Background¶ Apache DataFusion is a fast, extensible query engine for building …

Introduction¶ The Apache Arrow PMC is pleased to announce the donation of the Comet project, a native Spark SQL Accelerator built on Apache Arrow DataFusion. Comet is an Apache Spark plugin that uses Apache Arrow DataFusion to accelerate Spark workloads. It is designed as a drop-in replacement for Spark's JVM …

Introduction¶ We recently released DataFusion 34.0.0. This blog highlights some of the major improvements since we released DataFusion 26.0.0 (spoiler alert there are many) and a preview of where the community plans to focus in the next 6 months. Apache Arrow DataFusion is an extensible query …

Aggregating Millions of Groups Fast in Apache Arrow DataFusion¶ Andrew Lamb, Daniël Heres, Raphael Taylor-Davies, Note: this article was originally published on the InfluxData Blog TLDR¶ Grouped aggregations are a core part of any analytic tool, creating understandable summaries of huge data volumes. Apache Arrow DataFusion’s parallel...

It has been a whirlwind 6 months of DataFusion development since our last update: the community has grown, many features have been added, performance improved and we are discussing branching out to our own top level Apache Project. Background¶ Apache Arrow DataFusion is an extensible query engine and database toolkit …

Introduction¶ DataFusion is an extensible query execution framework, written in Rust, that uses Apache Arrow as its in-memory format. It is targeted primarily at developers creating data intensive analytics, and offers mature SQL support, a DataFrame API, and many extension points. Systems based on DataFusion perform very well in benchmarks …

Introduction¶ Ballista is an Arrow-native distributed SQL query engine implemented in Rust. Ballista 0.9.0 is now available and is the most significant release since the project was donated to Apache Arrow in 2021. This release represents 4 weeks of work, with 66 commits from 14 contributors: 22 Andy …

Introduction¶ Apache Arrow DataFusion 13.0.0 is released, and this blog contains an update on the project for the 5 months since our last update in May 2022. DataFusion is an extensible and embeddable query engine, written in Rust used to create modern, fast and efficient data pipelines, ETL …

Introduction¶ DataFusion is an extensible query execution framework, written in Rust, that uses Apache Arrow as its in-memory format. When you want to extend your Rust project with SQL support, a DataFrame API, or the ability to read and process Parquet, JSON, Avro or CSV data, DataFusion is definitely worth …

Introduction¶ Apache Arrow DataFusion is an extensible query execution framework, written in Rust, that uses Apache Arrow as its in-memory format. When you want to extend your Rust project with SQL support, a DataFrame API, or the ability to read and process Parquet, JSON, Avro or CSV data, DataFusion is …

Introduction¶ DataFusion is an extensible query execution framework, written in Rust, that uses Apache Arrow as its in-memory format. When you want to extend your Rust project with SQL support, a DataFrame API, or the ability to read and process Parquet, JSON, Avro or CSV data, DataFusion is definitely worth …

Introduction¶ DataFusion is an embedded query engine which leverages the unique features of Rust and Apache Arrow to provide a system that is high performance, easy to connect, easy to embed, and high quality. The Apache Arrow team is pleased to announce the DataFusion 6.0.0 release. This covers …

Ballista extends DataFusion to provide support for distributed queries. This is the first release of Ballista since the project was donated to the Apache Arrow project and includes 80 commits from 11 contributors. git shortlog -sn 4.0.0..5.0.0 ballista/rust/client ballista/rust/core ballista/rust …

The Apache Arrow team is pleased to announce the DataFusion 5.0.0 release. This covers 4 months of development work and includes 211 commits from the following 31 distinct contributors. $ git shortlog -sn 4.0.0..5.0.0 datafusion datafusion-cli datafusion-examples 61 Jiayu Liu 47 Andrew Lamb 27 …

We are excited to announce that Ballista has been donated to the Apache Arrow project. Ballista is a distributed compute platform primarily implemented in Rust, and powered by Apache Arrow. It is built on an architecture that allows other programming languages (such as Python, C++, and Java) to be supported …

We are excited to announce that DataFusion has been donated to the Apache Arrow project. DataFusion is an in-memory query engine for the Rust implementation of Apache Arrow. Although DataFusion was started two years ago, it was recently re-implemented to be Arrow-native and currently has limited capabilities but does support …