[Proposal] Add ALP encoding support in parquet file format #533

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1. prtkgaur

   added

   Type: enhancement

   on Nov 30, 2025
2. Bukhtawar commented on Dec 12, 2025

   

   Bukhtawar

   on Dec 12, 2025

   More actions

   Thanks @prtkgaur
   This is pretty exciting, are you actively working on this, would love to collaborate on this.
3. alamb

   added 2 commits that reference this issue on Jan 14, 2026

   apacheGH-533: Add ALP Encoding

   c2c8c44

   GH-533: Add ALP Encoding

   f70742c
4. alamb commented on Jan 14, 2026

   

   alamb

   on Jan 14, 2026

   Contributor

   More actions

   There has been quite a bit of work:

   • C/C++ prototype: [ALP][Parquet] Add C++ implementation of ALPpd encoder/decoder arrow#48701
   • Spec document
   • GH-533: Adaptive Lossless Floating-Point (ALP) Encoding #548
5. alamb commented on Apr 30, 2026

   

   alamb

   on Apr 30, 2026

   Contributor

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   We are now reviewing the proposed spec in detail, if anyone wants to join us:

   • GH-533: Add ALP (Adaptive Lossless floating-Point) encoding specification #557
6. alamb commented on Apr 30, 2026

   

   alamb

   on Apr 30, 2026

   Contributor

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   We are also working on the example files, see:

   • Add example ALP files parquet-testing#105
   • [GH-105] Add ALP dataset for floating point columns parquet-testing#100
7. prtkgaur

   added 2 commits that reference this issue on Jul 27, 2026

   Address review: add ALP=10 thrift enum and clarify spec

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   47bde32

   Address review: pipeline wording, unsigned deltas, vector diagram

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   5ae5435
8. alamb

   added a commit that references this issue on Jul 30, 2026

   GH-533: Add ALP (Adaptive Lossless floating-Point) encoding specifica…

   ...

   2076361
9. alamb

   closed this as completedin #557on Jul 30, 2026
10. alamb

    added a commit that references this issue on Aug 18, 2026

    [GH-533] Mark ALP as in Preview (#604)

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    3ef43e0