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[branch-56] feat: support ALP parquet encoding in writer options (backport #27036) - #27093
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Add ALP to DataFusion's parquet encoding configuration, conversion, documentation, protobuf round-trip tests, and SQL writer coverage. > [!IMPORTANT] > > **Fork CI setup:** For pull requests from a fork to `main`, enable workflows in your fork's **Actions** tab before you push. > See the [fork CI setup guide](https://datafusion.apache.org/contributor-guide/#pull-requests-from-forks). ## Which issue does this PR close? <!-- We generally require a GitHub issue to be filed for all bug fixes and enhancements and this helps us generate change logs for our releases. You can link an issue to this PR using the GitHub syntax. For example `Closes apache#123` indicates that this PR will close issue apache#123. --> - Closes apache#26936 ## Rationale for this change DataFusion could read ALP-encoded Parquet files but did not allow users to select ALP when writing files. ## What changes are included in this PR? - Add `alp` to `DFParquetEncoding` - Support ALP through `SET datafusion.execution.parquet.encoding` - Support ALP through `format.encoding` - Update configuration and SQL documentation - Add parser, conversion, protobuf, and SQLLogicTest coverage - Verify writing and reading ALP-encoded `DOUBLE` columns ## What is the testing strategy for this PR? <!-- We typically require tests for all PRs in order to: 1. Prevent the code from being accidentally broken by subsequent changes 2. Serve as another way to document the expected behavior of the code Briefly describe how this PR is tested, and point to the specific tests you added. For example: 'This new feature is covered by the `sqllogictest` cases added in `foo.slt`'. If this PR does not add tests, explain why. For example, if the change is already covered by existing tests, please mention it. You should also check the `codecov` bot reply on this PR to confirm the changed code is exercised. --> ## Are there any user-facing changes? <!-- If there are user-facing changes then we may require documentation to be updated before approving the PR. If there are any breaking changes to public APIs, please add the `api change` label. --> (cherry picked from commit 2f4d087)
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I would like to include this plumbing so we can support the new ALP encoding in DataFusion |
alamb
marked this pull request as ready for review
November 4, 2026 13:40
Codecov Report✅ All modified and coverable lines are covered by tests.
Flags with carried forward coverage won't be shown. Click here to find out more. @@ Coverage Diff @@
## branch-56 #27093 +/- ##
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- Coverage 83.25% 83.25% -0.01%
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Files 1169 1169
Lines 474294 474302 +8
Branches 474294 474302 +8
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Hits 394887 394887
- Misses 55485 55491 +6
- Partials 23922 23924 +2
... and 8 files with indirect coverage changes 🚀 New features to boost your workflow:
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xudong963
approved these changes
Nov 6, 2026
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Thank you @xudong963 |
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Which issue does this PR close?
56.0.0(Oct/Nov 2026) #24461branch-56ALPencoding in the parquet writer options (format.encoding/datafusion.execution.parquet.encoding) #26936.