Madan Kumar
0c3a1c92c8
Fixes #4033 `create_table(data=...)` without an explicit schema raised `IndexError: index out of bounds` when a `vector`/`embedding`-named list column was all-null. `_modal_list_size` infers the dimension with `pc.mode(pc.list_value_length(arr))[0]`, and pyarrow's `mode` skips nulls, so an all-null column produces a zero-length result and the `[0]` subscript blows up. The sibling `_infer_vector_dim` already guards the identical `pc.mode(...)` with a `len == 0` check and returns `None`; `_modal_list_size` just didn't. This makes `_modal_list_size` return `Optional[int]` and return `None` when every value is null, and the call site then leaves the column as a variable-length list instead of inventing a fixed size — the dimension is genuinely unknowable when there are no non-null rows. Added a regression test that creates a table from an all-null `list<float32>` vector column and asserts it succeeds, the column stays a `list<float32>`, and the rows are queryable. It fails on `main` with the `IndexError` and passes with this change.
The Multimodal Lakehouse for AI
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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.
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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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- 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.
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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 |
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