lancedb-gatefixer[bot] 569952d150 fix: allow hidden function assignment columns (#4779)
A second flattened Function declaration fails when the remote describe
schema omits an existing binding's internal assignment field. The client
incorrectly requires that server-owned field and compares it as a
physical user output.

Exclude assignment fields from binding/schema validation and the
output-schema comparison. Filter declared assignment fields from remote
schemas, including seeded caches and snapshot handles, while retaining
schema metadata.

The regression tests declare two all-nullable flattened bindings
consecutively with no assignment declaration, a hidden assignment field,
or a returned assignment field. They also cover cached and snapshot
schemas and server-owned assignment types and metadata. All four
regression cases failed before the fix.

Validation:

- `cargo fmt --all`
- `cargo test --quiet --profile ci --features remote -p lancedb --lib --
table::computed_columns::tests remote::table::tests` — 379 passed, 30
ignored.
- `cargo clippy --quiet --profile ci --features remote -p lancedb
--tests --examples`

Fixes #4778

<!-- lance-gatekeeper-fix:v1 agent=c55eff66e22d736a6b954a9eeec88898
generation=1 -->

Co-authored-by: Gatefixer <313497061+lancedb-gatefixer[bot]@users.noreply.github.com>
2026-10-31 09:07:09 -07:00
2026-10-30 12:54:54 -07:00
2023-03-17 18:15:19 -07:00
2025-03-10 09:01:23 -07:00

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LanceDB

The Multimodal Lakehouse for AI

How to Install ✦ Detailed Documentation ✦ Tutorials and Recipes ✦ Contributors

The ultimate multimodal data platform for AI/ML applications.

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.


Demo: Multimodal Search by Keyword, Vector or with SQL

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Key Features:

  • Fast Vector Search: Search billions of vectors in milliseconds with state-of-the-art indexing.
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  • Advanced Features: Zero-copy, automatic versioning, manage versions of your data without needing extra infrastructure. GPU support in building vector index.

Products:

  • LanceDB Embedded (open source): 100% open source, runs in your application's process; your data can live on local disk or in object storage. No vendor lock-in.
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Ecosystem:

  • Columnar Storage: Built on the Lance columnar format for efficient storage and analytics.
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  • Rich Ecosystem: Integrations with LangChain 🦜️🔗, LlamaIndex 🦙, Apache-Arrow, Pandas, Polars, DuckDB and more on the way.

How to Install:

Follow the Quickstart doc to set up LanceDB locally.

API & SDK: We also support Python, Typescript and Rust SDKs

Interface Documentation
Python SDK https://lancedb.github.io/lancedb/python/python/
Typescript SDK https://lancedb.github.io/lancedb/js/globals/
Rust SDK https://docs.rs/lancedb/latest/lancedb/index.html
REST API https://docs.lancedb.com/api-reference/rest

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Developer-friendly OSS embedded retrieval library for multimodal AI. Search More; Manage Less.
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