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<section id="apache-datafusion">
<h1>Apache DataFusion<a class="headerlink" href="#apache-datafusion" title="Link to this heading">¶</a></h1>
<p>
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<a class="github-button" href="https://github.com/apache/datafusion" data-size="large" data-show-count="true" aria-label="Star apache/datafusion on GitHub">Star</a>
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</p><p>DataFusion is an extensible query engine written in <a class="reference external" href="http://rustlang.org">Rust</a> that
uses <a class="reference external" href="https://arrow.apache.org">Apache Arrow</a> as its in-memory format.</p>
<p>The documentation on this site is for the <a class="reference external" href="https://github.com/apache/datafusion">core DataFusion project</a>, which contains
libraries and binaries for developers building fast and feature rich database and analytic systems,
customized to particular workloads. See <a class="reference external" href="https://datafusion.apache.org/user-guide/introduction.html#use-cases">use cases</a> for examples.</p>
<p>The following related subprojects target end users and have separate documentation.</p>
<ul class="simple">
<li><p><a class="reference external" href="https://datafusion.apache.org/python/">DataFusion Python</a> offers a Python interface for SQL and DataFrame
queries.</p></li>
<li><p><a class="reference external" href="https://github.com/apache/datafusion-ray/">DataFusion Ray</a> provides a distributed version of DataFusion
that scales out on <a class="reference external" href="https://www.ray.io">Ray</a> clusters.</p></li>
<li><p><a class="reference external" href="https://datafusion.apache.org/comet/">DataFusion Comet</a> is an accelerator for Apache Spark based on
DataFusion.</p></li>
</ul>
<p>“Out of the box,” DataFusion offers <a class="reference external" href="https://datafusion.apache.org/user-guide/sql/index.html">SQL</a>
and <a class="reference external" href="https://docs.rs/datafusion/latest/datafusion/dataframe/struct.DataFrame.html">Dataframe</a> APIs,
excellent <a class="reference external" href="https://benchmark.clickhouse.com/">performance</a>, built-in support for CSV, Parquet, JSON, and Avro,
extensive customization, and a great community.
<a class="reference external" href="https://github.com/apache/datafusion-python">Python Bindings</a> are also available.</p>
<p>DataFusion features a full query planner, a columnar, streaming, multi-threaded,
vectorized execution engine, and partitioned data sources. You can
customize DataFusion at almost all points including additional data sources,
query languages, functions, custom operators and more.
See the <a class="reference external" href="https://datafusion.apache.org/contributor-guide/architecture.html">Architecture</a> section for more details.</p>
<p>To get started, see</p>
<ul class="simple">
<li><p>The <a class="reference external" href="user-guide/example-usage.html">example usage</a> section of the user guide and the <a class="reference external" href="https://github.com/apache/datafusion/tree/main/datafusion-examples">datafusion-examples</a> directory.</p></li>
<li><p>The <a class="reference external" href="library-user-guide/index.html">library user guide</a> for examples of using DataFusion’s extension APIs</p></li>
<li><p>The <a class="reference external" href="contributor-guide/index.html#developer-s-guide">developer’s guide</a> for contributing and <a class="reference external" href="contributor-guide/communication.html">communication</a> for getting in touch with us.</p></li>
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<li class="toctree-l1"><a class="reference external" href="https://crates.io/crates/datafusion">crates.io</a></li>
<li class="toctree-l1"><a class="reference external" href="https://docs.rs/datafusion/latest/datafusion/">API Docs</a></li>
<li class="toctree-l1"><a class="reference external" href="https://datafusion.apache.org/blog/">Blog</a></li>
<li class="toctree-l1"><a class="reference external" href="https://github.com/apache/datafusion/blob/main/CODE_OF_CONDUCT.md">Code of conduct</a></li>
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<li class="toctree-l1"><a class="reference internal" href="user-guide/example-usage.html">Example Usage</a></li>
<li class="toctree-l1"><a class="reference internal" href="user-guide/concepts-readings-events.html">Concepts, Readings, Events</a></li>
<li class="toctree-l1"><a class="reference internal" href="user-guide/concepts-readings-events.html#community-events">🌎 Community Events</a></li>
<li class="toctree-l1"><a class="reference internal" href="user-guide/crate-configuration.html">Crate Configuration</a></li>
<li class="toctree-l1"><a class="reference internal" href="user-guide/cli/index.html">DataFusion CLI</a></li>
<li class="toctree-l1"><a class="reference internal" href="user-guide/dataframe.html">DataFrame API</a></li>
<li class="toctree-l1"><a class="reference internal" href="user-guide/expressions.html">Expression API</a></li>
<li class="toctree-l1"><a class="reference internal" href="user-guide/sql/index.html">SQL Reference</a></li>
<li class="toctree-l1"><a class="reference internal" href="user-guide/configs.html">Configuration Settings</a></li>
<li class="toctree-l1"><a class="reference internal" href="user-guide/explain-usage.html">Reading Explain Plans</a></li>
<li class="toctree-l1"><a class="reference internal" href="user-guide/faq.html">Frequently Asked Questions</a></li>
<li class="toctree-l1"><a class="reference internal" href="user-guide/faq.html#how-does-datafusion-compare-with-xyz">How does DataFusion Compare with <code class="docutils literal notranslate"><span class="pre">XYZ</span></code>?</a></li>
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<li class="toctree-l1"><a class="reference internal" href="library-user-guide/extensions.html">Extensions List</a></li>
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<li class="toctree-l1"><a class="reference internal" href="library-user-guide/using-the-dataframe-api.html">Using the DataFrame API</a></li>
<li class="toctree-l1"><a class="reference internal" href="library-user-guide/using-the-dataframe-api.html#write-dataframe-to-files">Write DataFrame to Files</a></li>
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<li class="toctree-l1"><a class="reference external" href="https://datafusion.apache.org/comet/">DataFusion Comet</a></li>
<li class="toctree-l1"><a class="reference external" href="https://datafusion.apache.org/python/">DataFusion Python</a></li>
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