Adityaj0
f79dc017c4
## Summary `LanceMergeInsertBuilder.when_not_matched_by_source_delete()` didn't clear a previously-set condition when called again with no argument (or a different condition type). Per the docstring, `condition=None` means "delete all unmatched rows," but if the builder had already been configured with a string/Expr condition, a later no-arg call left the stale condition in place instead of widening the delete to unconditional. Fixes #3767 ## Change Each call now unconditionally sets both `_when_not_matched_by_source_condition` and `_when_not_matched_by_source_condition_expr` (one to the new value, the other to `None`), so the latest call always wins — consistent with every other setter on this builder (e.g. `when_matched_update_all(where=...)`). ## Test plan - [x] New regression test `test_merge_insert_by_source_delete_reconfigure` in `python/python/tests/test_table.py` - [x] `uv run --extra tests pytest python/tests/test_table.py::test_merge_insert_by_source_delete_reconfigure python/tests/test_table.py::test_merge_insert_by_source_delete_expr python/tests/test_table.py::test_merge_insert_by_source_delete_expr_async -vv` — 3 passed - [x] `uv run --extra dev ruff format` / `ruff check` — clean Co-authored-by: Claude Sonnet 5 <noreply@anthropic.com>
The Multimodal AI Lakehouse
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 |
Join Us and Contribute
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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