Files
lancedb/python
Rashid Ul Islam c3cc2530b7 feat(python): expose fast_search in synchronous API (Fixes #2612) (#2962)
Fixes #2612

This PR exposes the private _fast_search attribute via a public
fast_search() method in the synchronous LanceVectorQueryBuilder.

Previously, enabling fast search in the sync API required accessing a
private member (query._fast_search = True). This change aligns the
synchronous API with the Async and Remote APIs, allowing for cleaner,
more Pythonic method chaining.

Changes:
Added fast_search() method to LanceVectorQueryBuilder in
python/python/lancedb/query.py.
Added a unit test verifying the flag works with high-dimensional data
(2560 dims) and chaining.
Example Usage:

Before:

```
query = table.search(vector)
query._fast_search = True  # Private attribute usage
results = query.limit(10).to_pandas()
```

After:

```
results = (
    table.search(vector)
    .fast_search()
    .limit(10)
    .to_pandas()
)
```

Verification:
I have added a test case (test_fast_search_high_dimension) that
replicates the scenario described in the issue (2560 dimensions, cosine
distance) to ensure the pipeline constructs the query correctly without
errors.

Checklist:

- [ ]  I have added tests to cover my changes.
- [ ]  All new and existing tests passed.
- [ ]  Documentation has been updated (inline docstrings).

Signed-off-by: Rashidul Islam <rasidulislam71@gmail.com>
2026-02-03 09:17:27 -08:00
..
2025-01-29 08:27:07 -08:00
2024-04-05 16:22:59 -07:00
2025-01-07 15:11:16 -08:00

LanceDB

A Python library for LanceDB.

Installation

pip install lancedb

Preview Releases

Stable releases are created about every 2 weeks. For the latest features and bug fixes, you can install the preview release. These releases receive the same level of testing as stable releases, but are not guaranteed to be available for more than 6 months after they are released. Once your application is stable, we recommend switching to stable releases.

pip install --pre --extra-index-url https://pypi.fury.io/lancedb/ lancedb

Usage

Basic Example

import lancedb
db = lancedb.connect('<PATH_TO_LANCEDB_DATASET>')
table = db.open_table('my_table')
results = table.search([0.1, 0.3]).limit(20).to_list()
print(results)

Development

See CONTRIBUTING.md for information on how to contribute to LanceDB.