docs: add DataFusion Java to subproject listings#22149
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May 13, 2026
| - [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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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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| - `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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I checked this link works: https://datafusion.apache.org/java/
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Which issue does this PR close?
Rationale for this change
The DataFusion Java subproject (https://datafusion.apache.org/java) is not yet listed alongside the other DataFusion subprojects (Python, Comet, Ballista) in the README and docs. This PR adds it so users discovering DataFusion can find the Java bindings.
What changes are included in this PR?
README.md: add DataFusion Java to the list of related subprojects next to DataFusion Python.docs/source/index.rst: add DataFusion Java to the related subprojects list and to the "DataFusion Subprojects" toctree.docs/source/contributor-guide/communication.md: mention Java in the list of subproject Discord channels.docs/source/user-guide/introduction.md: update the existingdatafusion-javalanguage-bindings entry to point at the officialapache/datafusion-javarepo (previously pointed atdatafusion-contrib/datafusion-java).Are these changes tested?
Docs-only change; no tests added.
Are there any user-facing changes?
Yes — documentation updates only.