mirror of
https://github.com/lancedb/lancedb.git
synced 2025-12-26 06:39:57 +00:00
a547c523c2
Previously, when we loaded the next version of the table, we would block all reads with a write lock. Now, we only do that if `read_consistency_interval=0`. Otherwise, we load the next version asynchronously in the background. This should mean that `read_consistency_interval > 0` won't have a meaningful impact on latency. Along with this change, I felt it was safe to change the default consistency interval to 5 seconds. The current default is `None`, which means we will **never** check for a new version by default. I think that default is contrary to most users expectations.
728 lines
21 KiB
Python
728 lines
21 KiB
Python
# SPDX-License-Identifier: Apache-2.0
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# SPDX-FileCopyrightText: Copyright The LanceDB Authors
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import re
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import os
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import lancedb
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import numpy as np
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import pandas as pd
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import pyarrow as pa
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import pytest
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from lancedb.pydantic import LanceModel, Vector
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@pytest.mark.parametrize("use_tantivy", [True, False])
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def test_basic(tmp_path, use_tantivy):
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db = lancedb.connect(tmp_path)
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assert db.uri == str(tmp_path)
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assert db.table_names() == []
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class SimpleModel(LanceModel):
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item: str
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price: float
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vector: Vector(2)
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table = db.create_table(
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"test",
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data=[
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{"vector": [3.1, 4.1], "item": "foo", "price": 10.0},
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{"vector": [5.9, 26.5], "item": "bar", "price": 20.0},
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],
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schema=SimpleModel,
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)
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with pytest.raises(
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ValueError, match="Cannot add a single LanceModel to a table. Use a list."
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):
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table.add(SimpleModel(item="baz", price=30.0, vector=[1.0, 2.0]))
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rs = table.search([100, 100]).limit(1).to_pandas()
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assert len(rs) == 1
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assert rs["item"].iloc[0] == "bar"
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rs = table.search([100, 100]).where("price < 15").limit(2).to_pandas()
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assert len(rs) == 1
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assert rs["item"].iloc[0] == "foo"
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table.create_fts_index("item", use_tantivy=use_tantivy)
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rs = table.search("bar", query_type="fts").to_pandas()
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assert len(rs) == 1
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assert rs["item"].iloc[0] == "bar"
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assert db.table_names() == ["test"]
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assert "test" in db
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assert len(db) == 1
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assert db.open_table("test").name == db["test"].name
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def test_ingest_pd(tmp_path):
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db = lancedb.connect(tmp_path)
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assert db.uri == str(tmp_path)
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assert db.table_names() == []
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data = pd.DataFrame(
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{
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"vector": [[3.1, 4.1], [5.9, 26.5]],
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"item": ["foo", "bar"],
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"price": [10.0, 20.0],
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}
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)
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table = db.create_table("test", data=data)
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rs = table.search([100, 100]).limit(1).to_pandas()
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assert len(rs) == 1
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assert rs["item"].iloc[0] == "bar"
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rs = table.search([100, 100]).where("price < 15").limit(2).to_pandas()
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assert len(rs) == 1
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assert rs["item"].iloc[0] == "foo"
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assert db.table_names() == ["test"]
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assert "test" in db
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assert len(db) == 1
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assert db.open_table("test").name == db["test"].name
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def test_ingest_iterator(mem_db: lancedb.DBConnection):
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class PydanticSchema(LanceModel):
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vector: Vector(2)
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item: str
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price: float
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arrow_schema = pa.schema(
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[
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pa.field("vector", pa.list_(pa.float32(), 2)),
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pa.field("item", pa.utf8()),
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pa.field("price", pa.float32()),
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]
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)
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def make_batches():
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for _ in range(5):
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yield from [
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# pandas
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pd.DataFrame(
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{
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"vector": [[3.1, 4.1], [1, 1]],
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"item": ["foo", "bar"],
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"price": [10.0, 20.0],
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}
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),
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# pylist
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[
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{"vector": [3.1, 4.1], "item": "foo", "price": 10.0},
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{"vector": [5.9, 26.5], "item": "bar", "price": 20.0},
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],
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# recordbatch
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pa.RecordBatch.from_arrays(
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[
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pa.array([[3.1, 4.1], [5.9, 26.5]], pa.list_(pa.float32(), 2)),
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pa.array(["foo", "bar"]),
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pa.array([10.0, 20.0]),
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],
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["vector", "item", "price"],
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),
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# pa Table
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pa.Table.from_arrays(
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[
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pa.array([[3.1, 4.1], [5.9, 26.5]], pa.list_(pa.float32(), 2)),
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pa.array(["foo", "bar"]),
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pa.array([10.0, 20.0]),
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],
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["vector", "item", "price"],
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),
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# pydantic list
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[
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PydanticSchema(vector=[3.1, 4.1], item="foo", price=10.0),
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PydanticSchema(vector=[5.9, 26.5], item="bar", price=20.0),
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],
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# TODO: test pydict separately. it is unique column number and
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# name constraints
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]
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def run_tests(schema):
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tbl = mem_db.create_table("table2", make_batches(), schema=schema)
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tbl.to_pandas()
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assert tbl.search([3.1, 4.1]).limit(1).to_pandas()["_distance"][0] == 0.0
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assert tbl.search([5.9, 26.5]).limit(1).to_pandas()["_distance"][0] == 0.0
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tbl_len = len(tbl)
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tbl.add(make_batches())
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assert tbl_len == 50
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assert len(tbl) == tbl_len * 2
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assert len(tbl.list_versions()) == 2
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mem_db.drop_database()
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run_tests(arrow_schema)
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run_tests(PydanticSchema)
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def test_table_names(tmp_db: lancedb.DBConnection):
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data = pd.DataFrame(
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{
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"vector": [[3.1, 4.1], [5.9, 26.5]],
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"item": ["foo", "bar"],
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"price": [10.0, 20.0],
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}
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)
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tmp_db.create_table("test2", data=data)
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tmp_db.create_table("test1", data=data)
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tmp_db.create_table("test3", data=data)
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assert tmp_db.table_names() == ["test1", "test2", "test3"]
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@pytest.mark.asyncio
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async def test_table_names_async(tmp_path):
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db = lancedb.connect(tmp_path)
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data = pd.DataFrame(
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{
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"vector": [[3.1, 4.1], [5.9, 26.5]],
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"item": ["foo", "bar"],
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"price": [10.0, 20.0],
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}
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)
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db.create_table("test2", data=data)
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db.create_table("test1", data=data)
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db.create_table("test3", data=data)
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db = await lancedb.connect_async(tmp_path)
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assert await db.table_names() == ["test1", "test2", "test3"]
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assert await db.table_names(limit=1) == ["test1"]
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assert await db.table_names(start_after="test1", limit=1) == ["test2"]
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assert await db.table_names(start_after="test1") == ["test2", "test3"]
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def test_create_mode(tmp_db: lancedb.DBConnection):
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data = pd.DataFrame(
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{
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"vector": [[3.1, 4.1], [5.9, 26.5]],
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"item": ["foo", "bar"],
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"price": [10.0, 20.0],
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}
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)
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tmp_db.create_table("test", data=data)
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with pytest.raises(Exception):
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tmp_db.create_table("test", data=data)
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new_data = pd.DataFrame(
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{
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"vector": [[3.1, 4.1], [5.9, 26.5]],
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"item": ["fizz", "buzz"],
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"price": [10.0, 20.0],
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}
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)
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tbl = tmp_db.create_table("test", data=new_data, mode="overwrite")
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assert tbl.to_pandas().item.tolist() == ["fizz", "buzz"]
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def test_create_table_from_iterator(mem_db: lancedb.DBConnection):
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def gen_data():
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for _ in range(10):
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yield pa.RecordBatch.from_arrays(
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[
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pa.array([[3.1, 4.1]], pa.list_(pa.float32(), 2)),
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pa.array(["foo"]),
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pa.array([10.0]),
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],
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["vector", "item", "price"],
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)
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table = mem_db.create_table("test", data=gen_data())
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assert table.count_rows() == 10
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@pytest.mark.asyncio
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async def test_create_table_from_iterator_async(mem_db_async: lancedb.AsyncConnection):
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def gen_data():
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for _ in range(10):
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yield pa.RecordBatch.from_arrays(
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[
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pa.array([[3.1, 4.1]], pa.list_(pa.float32(), 2)),
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pa.array(["foo"]),
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pa.array([10.0]),
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],
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["vector", "item", "price"],
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)
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table = await mem_db_async.create_table("test", data=gen_data())
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assert await table.count_rows() == 10
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def test_create_exist_ok(tmp_db: lancedb.DBConnection):
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data = pd.DataFrame(
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{
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"vector": [[3.1, 4.1], [5.9, 26.5]],
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"item": ["foo", "bar"],
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"price": [10.0, 20.0],
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}
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)
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tbl = tmp_db.create_table("test", data=data)
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with pytest.raises(ValueError):
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tmp_db.create_table("test", data=data)
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# open the table but don't add more rows
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tbl2 = tmp_db.create_table("test", data=data, exist_ok=True)
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assert tbl.name == tbl2.name
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assert tbl.schema == tbl2.schema
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assert len(tbl) == len(tbl2)
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schema = pa.schema(
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[
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pa.field("vector", pa.list_(pa.float32(), list_size=2)),
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pa.field("item", pa.utf8()),
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pa.field("price", pa.float64()),
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]
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)
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tbl3 = tmp_db.create_table("test", schema=schema, exist_ok=True)
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assert tbl3.schema == schema
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bad_schema = pa.schema(
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[
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pa.field("vector", pa.list_(pa.float32(), list_size=2)),
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pa.field("item", pa.utf8()),
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pa.field("price", pa.float64()),
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pa.field("extra", pa.float32()),
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]
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)
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with pytest.raises(ValueError):
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tmp_db.create_table("test", schema=bad_schema, exist_ok=True)
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@pytest.mark.asyncio
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async def test_connect(tmp_path):
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db = await lancedb.connect_async(tmp_path)
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assert str(db) == f"ListingDatabase(uri={tmp_path}, read_consistency_interval=5s)"
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db = await lancedb.connect_async(tmp_path, read_consistency_interval=None)
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assert str(db) == f"ListingDatabase(uri={tmp_path}, read_consistency_interval=None)"
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@pytest.mark.asyncio
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async def test_close(mem_db_async: lancedb.AsyncConnection):
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assert mem_db_async.is_open()
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mem_db_async.close()
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assert not mem_db_async.is_open()
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with pytest.raises(RuntimeError, match="is closed"):
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await mem_db_async.table_names()
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@pytest.mark.asyncio
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async def test_context_manager():
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with await lancedb.connect_async("memory://") as db:
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assert db.is_open()
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assert not db.is_open()
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@pytest.mark.asyncio
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async def test_create_mode_async(tmp_db_async: lancedb.AsyncConnection):
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data = pd.DataFrame(
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{
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"vector": [[3.1, 4.1], [5.9, 26.5]],
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"item": ["foo", "bar"],
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"price": [10.0, 20.0],
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}
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)
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await tmp_db_async.create_table("test", data=data)
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with pytest.raises(ValueError, match="already exists"):
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await tmp_db_async.create_table("test", data=data)
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new_data = pd.DataFrame(
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{
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"vector": [[3.1, 4.1], [5.9, 26.5]],
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"item": ["fizz", "buzz"],
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"price": [10.0, 20.0],
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}
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)
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_tbl = await tmp_db_async.create_table("test", data=new_data, mode="overwrite")
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# MIGRATION: to_pandas() is not available in async
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# assert tbl.to_pandas().item.tolist() == ["fizz", "buzz"]
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@pytest.mark.asyncio
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async def test_create_exist_ok_async(tmp_db_async: lancedb.AsyncConnection):
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data = pd.DataFrame(
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{
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"vector": [[3.1, 4.1], [5.9, 26.5]],
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"item": ["foo", "bar"],
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"price": [10.0, 20.0],
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}
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)
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tbl = await tmp_db_async.create_table("test", data=data)
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with pytest.raises(ValueError, match="already exists"):
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await tmp_db_async.create_table("test", data=data)
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# open the table but don't add more rows
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tbl2 = await tmp_db_async.create_table("test", data=data, exist_ok=True)
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assert tbl.name == tbl2.name
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assert await tbl.schema() == await tbl2.schema()
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schema = pa.schema(
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[
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pa.field("vector", pa.list_(pa.float32(), list_size=2)),
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pa.field("item", pa.utf8()),
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pa.field("price", pa.float64()),
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]
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)
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tbl3 = await tmp_db_async.create_table("test", schema=schema, exist_ok=True)
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assert await tbl3.schema() == schema
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# Migration: When creating a table, but the table already exists, but
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# the schema is different, it should raise an error.
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# bad_schema = pa.schema(
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# [
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# pa.field("vector", pa.list_(pa.float32(), list_size=2)),
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# pa.field("item", pa.utf8()),
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# pa.field("price", pa.float64()),
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# pa.field("extra", pa.float32()),
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# ]
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# )
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# with pytest.raises(ValueError):
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# await db.create_table("test", schema=bad_schema, exist_ok=True)
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@pytest.mark.asyncio
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async def test_create_table_v2_manifest_paths_async(tmp_path):
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db_with_v2_paths = await lancedb.connect_async(
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tmp_path, storage_options={"new_table_enable_v2_manifest_paths": "true"}
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)
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db_no_v2_paths = await lancedb.connect_async(
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tmp_path, storage_options={"new_table_enable_v2_manifest_paths": "false"}
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)
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# Create table in v2 mode with v2 manifest paths enabled
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tbl = await db_with_v2_paths.create_table(
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"test_v2_manifest_paths",
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data=[{"id": 0}],
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)
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assert await tbl.uses_v2_manifest_paths()
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manifests_dir = tmp_path / "test_v2_manifest_paths.lance" / "_versions"
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for manifest in os.listdir(manifests_dir):
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assert re.match(r"\d{20}\.manifest", manifest)
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# Start a table in V1 mode then migrate
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tbl = await db_no_v2_paths.create_table(
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"test_v2_migration",
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data=[{"id": 0}],
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)
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assert not await tbl.uses_v2_manifest_paths()
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manifests_dir = tmp_path / "test_v2_migration.lance" / "_versions"
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for manifest in os.listdir(manifests_dir):
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assert re.match(r"\d\.manifest", manifest)
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await tbl.migrate_manifest_paths_v2()
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assert await tbl.uses_v2_manifest_paths()
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for manifest in os.listdir(manifests_dir):
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assert re.match(r"\d{20}\.manifest", manifest)
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def test_open_table_sync(tmp_db: lancedb.DBConnection):
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tmp_db.create_table("test", data=[{"id": 0}])
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assert tmp_db.open_table("test").count_rows() == 1
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assert tmp_db.open_table("test", index_cache_size=0).count_rows() == 1
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with pytest.raises(ValueError, match="Table 'does_not_exist' was not found"):
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tmp_db.open_table("does_not_exist")
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@pytest.mark.asyncio
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async def test_open_table(tmp_path):
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db = await lancedb.connect_async(tmp_path)
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data = pd.DataFrame(
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{
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"vector": [[3.1, 4.1], [5.9, 26.5]],
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"item": ["foo", "bar"],
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"price": [10.0, 20.0],
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}
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)
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await db.create_table("test", data=data)
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tbl = await db.open_table("test")
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assert tbl.name == "test"
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assert (
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re.search(
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r"NativeTable\(test, uri=.*test\.lance, read_consistency_interval=5s\)",
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str(tbl),
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)
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is not None
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)
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assert await tbl.schema() == pa.schema(
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{
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"vector": pa.list_(pa.float32(), list_size=2),
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"item": pa.utf8(),
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"price": pa.float64(),
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}
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)
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# No way to verify this yet, but at least make sure we
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# can pass the parameter
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await db.open_table("test", index_cache_size=0)
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with pytest.raises(ValueError, match="was not found"):
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await db.open_table("does_not_exist")
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def test_delete_table(tmp_db: lancedb.DBConnection):
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data = pd.DataFrame(
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{
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"vector": [[3.1, 4.1], [5.9, 26.5]],
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"item": ["foo", "bar"],
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"price": [10.0, 20.0],
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|
}
|
|
)
|
|
tmp_db.create_table("test", data=data)
|
|
|
|
with pytest.raises(Exception):
|
|
tmp_db.create_table("test", data=data)
|
|
|
|
assert tmp_db.table_names() == ["test"]
|
|
|
|
tmp_db.drop_table("test")
|
|
assert tmp_db.table_names() == []
|
|
|
|
tmp_db.create_table("test", data=data)
|
|
assert tmp_db.table_names() == ["test"]
|
|
|
|
# dropping a table that does not exist should pass
|
|
# if ignore_missing=True
|
|
tmp_db.drop_table("does_not_exist", ignore_missing=True)
|
|
|
|
tmp_db.drop_all_tables()
|
|
|
|
assert tmp_db.table_names() == []
|
|
|
|
|
|
@pytest.mark.asyncio
|
|
async def test_delete_table_async(tmp_db: lancedb.DBConnection):
|
|
data = pd.DataFrame(
|
|
{
|
|
"vector": [[3.1, 4.1], [5.9, 26.5]],
|
|
"item": ["foo", "bar"],
|
|
"price": [10.0, 20.0],
|
|
}
|
|
)
|
|
|
|
tmp_db.create_table("test", data=data)
|
|
|
|
with pytest.raises(Exception):
|
|
tmp_db.create_table("test", data=data)
|
|
|
|
assert tmp_db.table_names() == ["test"]
|
|
|
|
tmp_db.drop_table("test")
|
|
assert tmp_db.table_names() == []
|
|
|
|
tmp_db.create_table("test", data=data)
|
|
assert tmp_db.table_names() == ["test"]
|
|
|
|
tmp_db.drop_table("does_not_exist", ignore_missing=True)
|
|
|
|
|
|
def test_drop_database(tmp_db: lancedb.DBConnection):
|
|
data = pd.DataFrame(
|
|
{
|
|
"vector": [[3.1, 4.1], [5.9, 26.5]],
|
|
"item": ["foo", "bar"],
|
|
"price": [10.0, 20.0],
|
|
}
|
|
)
|
|
new_data = pd.DataFrame(
|
|
{
|
|
"vector": [[5.1, 4.1], [5.9, 10.5]],
|
|
"item": ["kiwi", "avocado"],
|
|
"price": [12.0, 17.0],
|
|
}
|
|
)
|
|
tmp_db.create_table("test", data=data)
|
|
with pytest.raises(Exception):
|
|
tmp_db.create_table("test", data=data)
|
|
|
|
assert tmp_db.table_names() == ["test"]
|
|
|
|
tmp_db.create_table("new_test", data=new_data)
|
|
tmp_db.drop_database()
|
|
assert tmp_db.table_names() == []
|
|
|
|
# it should pass when no tables are present
|
|
tmp_db.create_table("test", data=new_data)
|
|
tmp_db.drop_table("test")
|
|
assert tmp_db.table_names() == []
|
|
tmp_db.drop_database()
|
|
assert tmp_db.table_names() == []
|
|
|
|
# creating an empty database with schema
|
|
schema = pa.schema([pa.field("vector", pa.list_(pa.float32(), list_size=2))])
|
|
tmp_db.create_table("empty_table", schema=schema)
|
|
# dropping a empty database should pass
|
|
tmp_db.drop_database()
|
|
assert tmp_db.table_names() == []
|
|
|
|
|
|
def test_empty_or_nonexistent_table(mem_db: lancedb.DBConnection):
|
|
with pytest.raises(Exception):
|
|
mem_db.create_table("test_with_no_data")
|
|
|
|
with pytest.raises(Exception):
|
|
mem_db.open_table("does_not_exist")
|
|
|
|
schema = pa.schema([pa.field("a", pa.int64(), nullable=False)])
|
|
test = mem_db.create_table("test", schema=schema)
|
|
|
|
class TestModel(LanceModel):
|
|
a: int
|
|
|
|
test2 = mem_db.create_table("test2", schema=TestModel)
|
|
assert test.schema == test2.schema
|
|
|
|
|
|
@pytest.mark.asyncio
|
|
async def test_create_in_v2_mode():
|
|
def make_data():
|
|
for i in range(10):
|
|
yield pa.record_batch([pa.array([x for x in range(1024)])], names=["x"])
|
|
|
|
def make_table():
|
|
return pa.table([pa.array([x for x in range(10 * 1024)])], names=["x"])
|
|
|
|
schema = pa.schema([pa.field("x", pa.int64())])
|
|
|
|
# Create table in v1 mode
|
|
|
|
v1_db = await lancedb.connect_async(
|
|
"memory://", storage_options={"new_table_data_storage_version": "legacy"}
|
|
)
|
|
|
|
tbl = await v1_db.create_table("test", data=make_data(), schema=schema)
|
|
|
|
async def is_in_v2_mode(tbl):
|
|
batches = (
|
|
await tbl.query().limit(10 * 1024).to_batches(max_batch_length=1024 * 10)
|
|
)
|
|
num_batches = 0
|
|
async for batch in batches:
|
|
num_batches += 1
|
|
return num_batches < 10
|
|
|
|
assert not await is_in_v2_mode(tbl)
|
|
|
|
# Create table in v2 mode
|
|
v2_db = await lancedb.connect_async(
|
|
"memory://", storage_options={"new_table_data_storage_version": "stable"}
|
|
)
|
|
|
|
tbl = await v2_db.create_table("test_v2", data=make_data(), schema=schema)
|
|
|
|
assert await is_in_v2_mode(tbl)
|
|
|
|
# Add data (should remain in v2 mode)
|
|
await tbl.add(make_table())
|
|
|
|
assert await is_in_v2_mode(tbl)
|
|
|
|
# Create empty table in v2 mode and add data
|
|
tbl = await v2_db.create_table("test_empty_v2", data=None, schema=schema)
|
|
await tbl.add(make_table())
|
|
|
|
assert await is_in_v2_mode(tbl)
|
|
|
|
# Db uses v2 mode by default
|
|
db = await lancedb.connect_async("memory://")
|
|
|
|
tbl = await db.create_table("test_empty_v2_default", data=None, schema=schema)
|
|
await tbl.add(make_table())
|
|
|
|
assert await is_in_v2_mode(tbl)
|
|
|
|
|
|
def test_replace_index(mem_db: lancedb.DBConnection):
|
|
table = mem_db.create_table(
|
|
"test",
|
|
[
|
|
{"vector": np.random.rand(32), "item": "foo", "price": float(i)}
|
|
for i in range(512)
|
|
],
|
|
)
|
|
table.create_index(
|
|
num_partitions=2,
|
|
num_sub_vectors=2,
|
|
)
|
|
|
|
with pytest.raises(Exception):
|
|
table.create_index(
|
|
num_partitions=2,
|
|
num_sub_vectors=4,
|
|
replace=False,
|
|
)
|
|
|
|
table.create_index(
|
|
num_partitions=1,
|
|
num_sub_vectors=2,
|
|
replace=True,
|
|
index_cache_size=10,
|
|
)
|
|
|
|
|
|
def test_prefilter_with_index(mem_db: lancedb.DBConnection):
|
|
data = [
|
|
{"vector": np.random.rand(32), "item": "foo", "price": float(i)}
|
|
for i in range(512)
|
|
]
|
|
sample_key = data[100]["vector"]
|
|
table = mem_db.create_table(
|
|
"test",
|
|
data,
|
|
)
|
|
table.create_index(
|
|
num_partitions=2,
|
|
num_sub_vectors=2,
|
|
)
|
|
table = (
|
|
table.search(sample_key)
|
|
.where("price == 500", prefilter=True)
|
|
.limit(5)
|
|
.to_arrow()
|
|
)
|
|
assert table.num_rows == 1
|
|
|
|
|
|
def test_create_table_with_invalid_names(tmp_db: lancedb.DBConnection):
|
|
data = [{"vector": np.random.rand(128), "item": "foo"} for i in range(10)]
|
|
with pytest.raises(ValueError):
|
|
tmp_db.create_table("foo/bar", data)
|
|
with pytest.raises(ValueError):
|
|
tmp_db.create_table("foo bar", data)
|
|
with pytest.raises(ValueError):
|
|
tmp_db.create_table("foo$$bar", data)
|
|
tmp_db.create_table("foo.bar", data)
|
|
|
|
|
|
def test_bypass_vector_index_sync(tmp_db: lancedb.DBConnection):
|
|
data = [{"vector": np.random.rand(32)} for _ in range(512)]
|
|
sample_key = data[100]["vector"]
|
|
table = tmp_db.create_table(
|
|
"test",
|
|
data,
|
|
)
|
|
|
|
table.create_index(
|
|
num_partitions=2,
|
|
num_sub_vectors=2,
|
|
)
|
|
|
|
plan_with_index = table.search(sample_key).explain_plan(verbose=True)
|
|
assert "ANN" in plan_with_index
|
|
|
|
plan_without_index = (
|
|
table.search(sample_key).bypass_vector_index().explain_plan(verbose=True)
|
|
)
|
|
assert "KNN" in plan_without_index
|