[Feature] Support 64-bit deletion vectors in Paimon C++

Assessment

Research direction

Description

deletion-vectors.enabled=true
deletion-vectors.bitmap64=true

Paimon C++ currently exposes the deletion-vectors.bitmap64 option, but bitmap64 deletion vectors are not implemented:
- include/paimon/defs.h marks bitmap64 DV as unsupported.
- DeletionVector::Read recognizes the bitmap64 magic number but returns NotImplemented.
- Only BitmapDeletionVector, backed by RoaringBitmap32, is currently used for deletion-vector reads and writes.
As a result, Paimon C++ cannot read tables containing bitmap64 deletion vectors produced by Java Paimon, and cannot produce Iceberg-compatible deletion vectors.


### Solution

_No response_

### Anything else?

_No response_

### Are you willing to submit a PR?

- [x] I'm willing to submit a PR!

Contributor guide

Open the contributing guide

First steps

1. Read the whole issue, then the project's contributing guide.
2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
3. Fork the repository and make your change on a branch.
4. Open a pull request that references the issue number.

More from apache/paimon-cpp

• [Feature] dictionary encoded binary support Open
  enhancement

  apache/paimon-cpp#381 · 1 assignee · Opened Sep 21, 2026

• [Feature] Bypass manifest lists on exact snapshot live-entry cache hits Open

  Difficulty 4/5 3-5 days Newbie friendliness 30/100

  apache/paimon-cpp#375 · 1 assignee · Opened Sep 19, 2026

• [Feature] Access table data with the temporary credentials issued by the REST catalog Open
  enhancement

  Difficulty 5/5 Over a week Newbie friendliness 30/100

  apache/paimon-cpp#369 · 1 assignee · Opened Sep 17, 2026

• [Feature] Support vector and full-text search in File Index Open
  enhancement

  Difficulty 5/5 Over a week Newbie friendliness 45/100

  apache/paimon-cpp#361 · 1 assignee · Opened Sep 16, 2026

• [Bug] Configured Variant shredding schema without field IDs is rejected unlike Java Paimon Open
  bug

  Difficulty 4/5 3-5 days Newbie friendliness 68/100

  apache/paimon-cpp#347 · 1 assignee · Opened Sep 15, 2026

All issues in apache/paimon-cpp

Similar issues

• [Bug] NULL pointer dereference in llm_running_callback (NGZA-AX-LLM #3) Open

  Difficulty 1/5 Under an hour Newbie friendliness 90/100

  AXERA-TECH/ax-llm#77 · Opened Sep 22, 2026

• resume() sends a second HTTP response (400) after a successful resume Open

  Difficulty 1/5 Under an hour Newbie friendliness 90/100

  games-on-whales/wolf#509 · Opened Sep 21, 2026

• pn7160: reader goes permanently deaf — post-read IRQ-low check fails reads that succeeded Open

  Difficulty 2/5 1-3 hours Newbie friendliness 74/100

  esphome/esphome#19452 · Opened Sep 21, 2026

• Eval bug: Ministral-3 tool-calls during reasoning are not processed Open
  bug-unconfirmed

  Difficulty 2/5 1-3 hours Newbie friendliness 76/100

  ggml-org/llama.cpp#29248 · Opened Sep 21, 2026

• run_tests.py fails on windows, but running tests individually works Open

  Difficulty 2/5 1-3 hours Newbie friendliness 74/100

  NVIDIA/cuda-samples#453 · Opened Sep 21, 2026

More C++ issues