Files
lancedb/docs
J Ganesh Kumar Reddy 12d86ea251 feat(nodejs): add col() expression builder for camelCase column names
## Summary

Fixes #3211 by exposing the shared Rust/DataFusion expression builder through Node bindings. Case-sensitive references such as `col("firstName")` can be composed and passed to `where()`, while SQL strings remain supported.

The expression-object representation follows [the design requested on #3290](https://github.com/lancedb/lancedb/pull/3290#discussion_r3632371998). That earlier PR remains open; no claim is made that the issue was unclaimed or that maintainers have selected this implementation.

## Review corrections

- Construct the named native struct correctly and parse casts through `arrow_schema::DataType`.
- Preserve numeric values: use Int64 only for JavaScript safe integers; retain Float64 otherwise. Explicit `litInt` rejects unsupported numbers with a documented `RangeError`.
- Correct test syntax/API calls and align SQL assertions with the shared dialect, including reserved and case-sensitive names.
- Use typed, isolated temporary test tables with cleanup, and cover an actual large-number filter threshold.
- Document the public methods and commit generated API documentation.

Synced with current main `0bceaaf3` through a normal merge. The diff is limited to seven Node source/test/config files and eleven generated documentation files; no Rust core change.

## Validation

[Linux validation run](https://github.com/Ganesh1729-ui/lancedb/actions/runs/38244794288) on Node 24 / Rust 1.97.0 with the repository's `ci` profile and `remote,lancedb/metrics-otel` features:

- Rebuilt native addon, TypeScript build, Biome, Rust formatting and native Clippy pass.
- Expression/query/Arrow/table suites: **1,129 passed**; expression suite repeated: **42 passed**.
- Using the original JavaScript numeric dispatch with the rebuilt addon: **8 regressions fail, 2 controls pass**.
- Strict TypeDoc generation passes. Final local typing/docs/lint checks pass; the PR source equals the validated source except for the separate validation workflow, which is excluded from this PR.

Full provider/model/S3, other feature combinations and OS/Node matrices were not run in this follow-up. Upstream checks and maintainer review remain separate.

## AI assistance

AI was used for implementation, review and testing. No prior human review is claimed.
2026-10-29 02:18:16 +08:00
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2026-09-09 15:33:04 +08:00

LanceDB Documentation

For website guides in docs/web, start with Documentation in CONTRIBUTING.md. That covers editing pages, generated examples, previews, availability and drafts.

This page covers the SDK reference in docs/src, built with MkDocs. Its GitHub Actions workflow builds and deploys on pushes to main, so it can include unreleased APIs. That is separate from the release editions of the Mintlify website.

Building the docs

Setup

  1. Install LanceDB Python. See setup in Python contributing guide. Run make develop to install the Python package.
  2. Install documentation dependencies. From LanceDB repo root: pip install -r docs/requirements.txt

Preview the docs

Run these commands from the LanceDB repository root. The subshell changes into docs to load mkdocs.yml, while leaving your shell in the repository root.

(cd docs && PYTHONPATH=. mkdocs serve)

If you want to just generate the HTML files:

(cd docs && PYTHONPATH=. mkdocs build)

If successful, you should see a docs/site directory in the repository root that you can verify locally.

Adding examples

To make sure examples are correct, we put examples in test files so they can be run as part of our test suites.

You can see the tests are at:

  • Python: python/python/tests/docs
  • Typescript: nodejs/examples/

Checking python examples

cd python
pytest -vv python/tests/docs

Checking typescript examples

The examples depend on @lancedb/lancedb at file:../dist, so the package must be built before running the tests. This uses pnpm; see the Typescript contributing guide for the toolchain setup.

pushd nodejs
pnpm install
pnpm build
popd

Then you can run the examples by going to the nodejs/examples directory, which is a separate pnpm package with its own lockfile:

pushd nodejs/examples
pnpm install
pnpm test
popd

API documentation

Python

The Python API documentation is organized based on the file docs/src/python/python.md. We manually add entries there so we can control the organization of the reference page. However, this means any new types must be manually added to the file. No additional steps are needed to generate the API documentation.

Typescript

The typescript API documentation is generated from the typescript source code using typedoc.

When new APIs are added, you must manually re-run the typedoc command to update the API documentation. The new files should be checked into the repository.

pushd nodejs
# `pnpm docs` would invoke pnpm's built-in `docs` command, not the script.
pnpm run docs
popd