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a207213358
Closes #2114 Starting in #1965, we no longer pass the table schema into `pa.Table.from_pylist()`. This means PyArrow is choosing the order of the struct subfields, and apparently it does them in alphabetical order. This is fine in theory, since in Lance we support providing fields in any order. However, before we pass it to Lance, we call `pa.Table.cast()` to align column types to the table types. `pa.Table.cast()` is strict about field order, so we need to create a cast target schema that aligns with the input data. We were doing this at the top-level fields, but weren't doing this in nested fields. This PR adds support to do this for nested ones.
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.