Cohen Karnell
dd2b11eda2
`RemoteDBConnection.open_table` accepts `storage_options` and never uses
it:
```python
def open_table(
self,
name: str,
*,
namespace_path: Optional[List[str]] = None,
storage_options: Optional[Dict[str, str]] = None,
index_cache_size: Optional[int] = None,
...
) -> Table:
...
if index_cache_size is not None:
logging.info("index_cache_size is ignored in LanceDb Cloud ...")
table = LOOP.run(self._conn.open_table(name, namespace_path=namespace_path))
```
The value is never passed down and never mentioned. `index_cache_size`
is ignored on Cloud in the
same way, but it says so.
I checked this at runtime on 0.34.0, not just by reading it: swapping
the inner connection for a
recorder, `open_table("t", storage_options={...})` hands the layer below
`['namespace_path']` and
nothing else, no log record is emitted, and the same probe shows
`index_cache_size` producing its
message as expected.
This adds the matching log line, so the two ignored parameters behave
the same way. `ruff check` and
`ruff format --check` are clean on the file.
A note on severity. This is not a security hole and nothing is exposed.
Someone passing credentials
there gets silence instead of an error, and finds out later.
One thing I am unsure about, and it changes the fix. I have assumed
per-table storage options are
meaningless on Cloud, which is what the `index_cache_size` line next to
it implies about managed
storage. If they are supposed to work, then the right change is to pass
them through to
`self._conn.open_table` instead and this patch is the wrong one. Happy
to redo it that way.
I did not check whether `create_table` or the async connection have the
same gap.
LanceDB Python SDK
A Python library for LanceDB.
Installation
pip install lancedb
Pre-Haswell x86_64 hosts: lancedb-compat
The default lancedb wheel targets x86-64-haswell (AVX2 + FMA + F16C) for full performance on modern hardware. Pre-Haswell hosts — Intel Sandy Bridge / Ivy Bridge / Westmere; AMD Bulldozer / Piledriver / Steamroller — don't have AVX2 and crash with Illegal instruction at import lancedb.
For those hosts, install the lancedb-compat package instead:
pip install lancedb-compat
Same Python API (import lancedb works as usual). The compat wheel is compiled at the x86-64-v2 baseline (Nehalem-class) and uses runtime SIMD dispatch in the embedded lance crate to pick the right kernel tier (scalar / AVX / AVX+FMA / AVX2+FMA / AVX-512) at load time, so it still goes fast on modern hardware while running cleanly on the pre-Haswell silicon. Use lance.simd_info() from Python to verify which tier was selected.
lancedb and lancedb-compat install to the same lancedb/ namespace and conflict at install time. Pick one. To switch, pip uninstall lancedb first, then pip install lancedb-compat (or vice-versa).
If you need a custom baseline (or lancedb-compat isn't yet published for your platform), build from source with the override:
RUSTFLAGS="-C target-cpu=x86-64-v2" maturin build --release
pip install ./target/wheels/lancedb-*.whl
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.