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lancedb/python/vendor/lance-arrow/README.lancedb.md
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Xuanwo ad1212fb32 chore: update Lance to v15.0.0-beta.2 (#4690)
**Blocked on the corrected Lance release:**
https://github.com/lance-format/lance/pull/10370 restores the `Send`
contract required by downstream Function workers. Refresh this upgrade
with that release before merging.

Upgrade the Rust, Java, and Python Lance dependencies to
https://github.com/lance-format/lance/releases/tag/v15.0.0-beta.2. This
brings in bounded vector-index consolidation without retraining
(https://github.com/lance-format/lance/pull/10335) and deletion
filtering for index entries whose fragment coverage was pruned
(https://github.com/lance-format/lance/pull/10325).

Synchronize the vendored `lance-arrow` with the release and retain its
offset-safe validity patch. The existing `nullable_struct_merge`
regression still panics with the unpatched release, so removing that
patch would regress nullable nested queries. Refresh both lockfiles,
including the `zstd-sys` version required by the new Lance encoding
dependency.

Update the custom memtable bitmap test adapter to train on row
addresses, matching the new bitmap contract; remove its obsolete row-ID
conversion.

Preserve the Blob APIs' existing missing-row error messages when newer
Lance rejects a missing fragment earlier in the read path. Retain
upstream attribution in vendored sources while satisfying the repository
license-header check.

Validation of the compatibility fixes: all 58 Rust Blob integration
tests and 219 Python Blob tests pass (one Python test skipped). Strict
workspace Clippy, formatting, and diff checks pass.
2026-10-27 17:35:43 +08:00

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Markdown

This directory contains `rust/lance-arrow` from Lance tag `v15.0.0-beta.2`
(commit `f50a157269d925ad5708c7b0f7ec6c87b0fd08dd`), licensed under Apache-2.0.
LanceDB carries a local fix in `src/lib.rs` for sliced child validity bitmaps
until a Lance release includes the fix. The patch is selected in the root
`Cargo.toml`; the rest of Lance stays on the pinned release. An explicit unsafe
block in `src/bfloat16.rs` lets this copy pass LanceDB's Rust 2024 warning gate.