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b2317c904d
* Expose `bitmap` and `LabelList` scalar index type via Rust and Async Python API * Add documents
94 lines
3.1 KiB
Python
94 lines
3.1 KiB
Python
# SPDX-License-Identifier: Apache-2.0
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# SPDX-FileCopyrightText: Copyright The LanceDB Authors
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from datetime import timedelta
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import random
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import pyarrow as pa
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import pytest
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import pytest_asyncio
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from lancedb import AsyncConnection, AsyncTable, connect_async
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from lancedb.index import BTree, IvfPq, Bitmap, LabelList
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@pytest_asyncio.fixture
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async def db_async(tmp_path) -> AsyncConnection:
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return await connect_async(tmp_path, read_consistency_interval=timedelta(seconds=0))
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def sample_fixed_size_list_array(nrows, dim):
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vector_data = pa.array([float(i) for i in range(dim * nrows)], pa.float32())
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return pa.FixedSizeListArray.from_arrays(vector_data, dim)
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DIM = 8
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NROWS = 256
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@pytest_asyncio.fixture
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async def some_table(db_async):
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data = pa.Table.from_pydict(
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{
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"id": list(range(NROWS)),
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"vector": sample_fixed_size_list_array(NROWS, DIM),
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"tags": [
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[f"tag{random.randint(0, 8)}" for _ in range(2)] for _ in range(NROWS)
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],
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}
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)
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return await db_async.create_table(
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"some_table",
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data,
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)
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@pytest.mark.asyncio
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async def test_create_scalar_index(some_table: AsyncTable):
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# Can create
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await some_table.create_index("id")
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# Can recreate if replace=True
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await some_table.create_index("id", replace=True)
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indices = await some_table.list_indices()
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assert str(indices) == '[Index(BTree, columns=["id"])]'
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assert len(indices) == 1
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assert indices[0].index_type == "BTree"
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assert indices[0].columns == ["id"]
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# Can't recreate if replace=False
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with pytest.raises(RuntimeError, match="already exists"):
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await some_table.create_index("id", replace=False)
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# can also specify index type
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await some_table.create_index("id", config=BTree())
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@pytest.mark.asyncio
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async def test_create_bitmap_index(some_table: AsyncTable):
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await some_table.create_index("id", config=Bitmap())
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# TODO: Fix via https://github.com/lancedb/lance/issues/2039
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# indices = await some_table.list_indices()
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# assert str(indices) == '[Index(Bitmap, columns=["id"])]'
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@pytest.mark.asyncio
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async def test_create_label_list_index(some_table: AsyncTable):
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await some_table.create_index("tags", config=LabelList())
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# TODO: Fix via https://github.com/lancedb/lance/issues/2039
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# indices = await some_table.list_indices()
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# assert str(indices) == '[Index(LabelList, columns=["id"])]'
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@pytest.mark.asyncio
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async def test_create_vector_index(some_table: AsyncTable):
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# Can create
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await some_table.create_index("vector")
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# Can recreate if replace=True
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await some_table.create_index("vector", replace=True)
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# Can't recreate if replace=False
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with pytest.raises(RuntimeError, match="already exists"):
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await some_table.create_index("vector", replace=False)
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# Can also specify index type
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await some_table.create_index("vector", config=IvfPq(num_partitions=100))
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indices = await some_table.list_indices()
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assert len(indices) == 1
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assert indices[0].index_type == "IvfPq"
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assert indices[0].columns == ["vector"]
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