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docs: add DataFusion Java to subproject listings #22149

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2 changes: 2 additions & 0 deletions README.md
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Expand Up @@ -63,6 +63,8 @@ See [use cases] for examples. The following related subprojects target end users

- [DataFusion Python](https://github.com/apache/datafusion-python/) offers a Python interface for SQL and DataFrame
queries.
- [DataFusion Java](https://github.com/apache/datafusion-java/) offers a Java interface for SQL and DataFrame
queries.
- [DataFusion Comet](https://github.com/apache/datafusion-comet/) is an accelerator for Apache Spark based on
DataFusion.

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2 changes: 1 addition & 1 deletion docs/source/contributor-guide/communication.md
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Expand Up @@ -44,7 +44,7 @@ all technical designs are recorded and formalized in GitHub issues.

Historically, the most active discussion forum has been the [Arrow Rust Discord
server][discord-link] which has specific channels for Arrow, DataFusion, and
DataFusion subprojects such as Ballista, Comet, Python, etc.
DataFusion subprojects such as Ballista, Comet, Java, Python, etc.
DataFusion specific channels are prefixed with the `#datafusion-` tag.
We recommend new users join this server for real-time discussions with the community.

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3 changes: 3 additions & 0 deletions docs/source/index.rst
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Expand Up @@ -54,6 +54,8 @@ The following related subprojects target end users and have separate documentati

- `DataFusion Python <https://datafusion.apache.org/python/>`_ offers a Python interface for SQL and DataFrame
queries.
- `DataFusion Java <https://datafusion.apache.org/java/>`_ offers a Java interface for SQL and DataFrame
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@alamb alamb May 13, 2026

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I checked this link works: https://datafusion.apache.org/java/

👍

queries.
- `DataFusion Comet <https://datafusion.apache.org/comet/>`_ is an accelerator for Apache Spark based on
DataFusion.
- `DataFusion Ballista <https://datafusion.apache.org/ballista/>`_ is distributed processing extension for DataFusion.
Expand Down Expand Up @@ -178,4 +180,5 @@ To get started, see

DataFusion Ballista <https://datafusion.apache.org/ballista/>
DataFusion Comet <https://datafusion.apache.org/comet/>
DataFusion Java <https://datafusion.apache.org/java/>
DataFusion Python <https://datafusion.apache.org/python/>
2 changes: 1 addition & 1 deletion docs/source/user-guide/introduction.md
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Expand Up @@ -186,7 +186,7 @@ provide integrations with other systems, some of which are described below:
- [datafusion-c](https://github.com/datafusion-contrib/datafusion-c)
- [datafusion-python](https://github.com/apache/datafusion-python)
- [datafusion-ruby](https://github.com/datafusion-contrib/datafusion-ruby)
- [datafusion-java](https://github.com/datafusion-contrib/datafusion-java)
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@alamb alamb May 13, 2026

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What should we do with the https://github.com/datafusion-contrib/datafusion-java repo now?

@jimexist I think you largely worked on that. Shall we perhaps archive the repo / point people at the one in apache?

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@alamb alamb May 13, 2026

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Filed a discussion to track

- [datafusion-java](https://github.com/apache/datafusion-java)

### Integrations

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