mirror of
https://github.com/lancedb/lancedb.git
synced 2025-12-26 06:39:57 +00:00
d6f0663671
1. filtering with fts mutated the schema, which caused schema mistmatch problems with hybrid search as it combines fts and vector search tables. 2. fts with filter failed with `with_row_id`. This was because row_id was calculated before filtering which caused size mismatch on attaching it after. 3. The fix for 1 meant that now row_id is attached before filtering but passing a filter to `to_lance` on a dataset that already contains `_rowid` raises a panic from lance. So temporarily, in case where fts is used with a filter AND `with_row_id`, we just force user to using the duckdb pathway. --------- Co-authored-by: Chang She <759245+changhiskhan@users.noreply.github.com>
LanceDB
A Python library for LanceDB.
Installation
pip install 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
LanceDb is based on the rust crate lancedb and is built with maturin. In order to build with maturin
you will either need a conda environment or a virtual environment (venv).
python -m venv venv
. ./venv/bin/activate
Install the necessary packages:
python -m pip install .[tests,dev]
To build the python package you can use maturin:
# This will build the rust bindings and place them in the appropriate place
# in your venv or conda environment
matruin develop
To run the unit tests:
pytest
To run the doc tests:
pytest --doctest-modules python/lancedb
To run linter and automatically fix all errors:
ruff format python
ruff --fix python
If any packages are missing, install them with:
pip install <PACKAGE_NAME>
For Windows users, there may be errors when installing packages, so these commands may be helpful:
Activate the virtual environment:
. .\venv\Scripts\activate
You may need to run the installs separately:
pip install -e .[tests]
pip install -e .[dev]
tantivy requires rust to be installed, so install it with conda, as it doesn't support windows installation:
pip install wheel
pip install cargo
conda install rust
pip install tantivy