lancedb-gatefixer[bot] 36054be576 fix(node): preserve nested Arrow data across versions (#3900)
<!-- lance-gatekeeper-fix:v1 agent=613a074d606e626c5169d601373a32d8
generation=1 -->

## Root cause

When LanceDB accepted an Arrow table created by a different installed
Arrow package, its compatibility sanitizer rebuilt each Data node
without converting the foreign type or preserving nested children. It
also dropped the separate dictionary vector payload and did not preserve
identity shared by dictionary schema types, vector wrappers, or growing
dictionary chunks.

## Fix

Recursively sanitize nested Arrow data types and child data. Use one
table-scoped sanitization context to rebuild and memoize source type
objects, dictionary vectors, and Data nodes in the local Arrow realm,
preserving all identities required by Arrow IPC.

Add Arrow 15 through 18 regressions for list serialization, ordinary
dictionaries, dictionaries shared across fields and batches, growing
dictionaries, and IPC round trips.

## Validation

- pnpm test __test__/arrow.test.ts --runInBand (188 passed)
- pnpm lint
- pnpm build
- pnpm test --runInBand (706 passed, 5 skipped)
- pnpm run docs

Fixes #2256

---------

Co-authored-by: Gatefixer <313497061+lancedb-gatefixer[bot]@users.noreply.github.com>
2026-08-09 03:34:39 +08:00
2023-03-17 18:15:19 -07:00
2025-03-10 09:01:23 -07:00

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LanceDB is designed for fast, scalable, and production-ready vector search. It is built on top of the Lance columnar format. You can store, index, and search over petabytes of multimodal data and vectors with ease. LanceDB is a central location where developers can build, train and analyze their AI workloads.


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