Yingzi Zhang
55897d7c3b
Fixes #4331 With `return_score="all"`, model rerankers reconstruct merged rows without their Arrow schema. This changes fixed-size float32 vectors into variable-length float64 lists, loses metadata, and can overflow valid uint64 row IDs. Unify the original input schemas before inserting placeholder scores, then use the unified schema when reconstructing the merged table. Row merging and reranking behavior stay the same. Capturing the schema first also preserves float64 scores without conflicting with the float32 null placeholders. Validation: - New regression cases: 5 failures and 5 passing controls before the fix; all 10 pass afterward. - Reranker, hybrid-query and TypeSafe reranker tests: 150 passed, 17 skipped. Optional live model/API tests were not run. - The fake-client tests that use random metadata passed again with seeds 7 and 41. - Repository-wide Ruff lint/format checks, configured Pyright check and applicable pre-commit hooks pass. - Tests used the locally built Rust/Python extension and the repository's locked uv environment. No Rust code changed. AI disclosure: I used Codex for investigation, implementation, tests, local checks, and drafting this description.
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.
- Comprehensive Search: Support for vector similarity search, full-text search and SQL.
- Multimodal Support: Store, query and filter vectors, metadata and multimodal data (text, images, videos, point clouds, and more).
- Advanced Features: Zero-copy, automatic versioning, manage versions of your data without needing extra infrastructure. GPU support in building vector index.
Products:
- Open Source & Local: 100% open source, runs locally or in your cloud. No vendor lock-in.
- Cloud and Enterprise: Production-scale vector search with no servers to manage. Complete data sovereignty and security.
Ecosystem:
- Columnar Storage: Built on the Lance columnar format for efficient storage and analytics.
- Seamless Integration: Python, Node.js, Rust, and REST APIs for easy integration. Native Python and Javascript/Typescript support.
- 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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We welcome contributions from everyone! Whether you're a developer, researcher, or just someone who wants to help out.
If you have any suggestions or feature requests, please feel free to open an issue on GitHub or discuss it on our Discord server.
Check out the GitHub Issues if you would like to work on the features that are planned for the future. If you have any suggestions or feature requests, please feel free to open an issue on GitHub.
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