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https://github.com/lancedb/lancedb.git
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Brendan Clement
06aa526ae1
This PR is part of the documentation revamp. Once the full set of PRs is merged, we’ll publish the combined site to staging for review before updating docs.lancedb.com. The curation, SQL and operations pages contain outdated claims and examples that do not reliably work as written. This corrects those pages against the reviewed SDK and local server evidence, including prepared statements, background jobs, cleanup and monitoring. Integration guides are grouped with their examples in #4533. Function and Secret-object documentation stays unpublished until its release. The two Function pages are listed in `.mintignore` and left out of the navigation, and the sections about them on other pages are MDX comments. Stacked on #4533. Each MDX file has one PR owner. Rebase onto main after #4533 is squash-merged. Local assembly, Mint validation and link checks pass, and the assembled site shows no Function or Secret-object content. A local release rehearsal that uncomments the drafts and restores the navigation also passes. Hold publication until this PR and lancedb/sophon#8688 are on `main`.
80 lines
2.3 KiB
Python
80 lines
2.3 KiB
Python
# SPDX-License-Identifier: Apache-2.0
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# SPDX-FileCopyrightText: Copyright The LanceDB Authors
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"""Examples for docs/web/feature-engineering/materialized-views.mdx."""
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def test_materialized_view_create_and_refresh(tmp_path, monkeypatch):
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monkeypatch.chdir(tmp_path)
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# --8<-- [start:materialized_view_create]
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import lancedb
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db = lancedb.connect("./.lancedb")
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table = db.create_table(
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"people",
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[{"name": "ada", "age": 36}, {"name": "kid", "age": 7}],
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storage_options={"new_table_enable_stable_row_ids": "true"},
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)
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view = db.create_materialized_view(
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"adults",
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"people",
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select=["name", ("shout", "upper(name)")],
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where="age >= 18",
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)
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print(view.table.count_rows())
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# 1
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# --8<-- [end:materialized_view_create]
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assert view.table.count_rows() == 1
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# --8<-- [start:materialized_view_refresh]
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table.add([{"name": "bea", "age": 41}])
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view.refresh()
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print(view.table.count_rows())
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# 2
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# --8<-- [end:materialized_view_refresh]
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assert view.table.count_rows() == 2
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assert sorted(row["shout"] for row in view.table.to_arrow().to_pylist()) == [
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"ADA",
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"BEA",
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]
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def test_materialized_view_with_no_data(tmp_path):
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import lancedb
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db = lancedb.connect(tmp_path)
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db.create_table(
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"people",
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[{"name": "ada", "age": 36}, {"name": "kid", "age": 7}],
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storage_options={"new_table_enable_stable_row_ids": "true"},
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)
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view = db.create_materialized_view(
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"adults", "people", where="age >= 18", with_no_data=True
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)
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assert view.table.count_rows() == 0
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assert view.refresh().rows_written == 1
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assert view.table.count_rows() == 1
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def test_materialized_view_refresh_to_source_version(tmp_path):
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import lancedb
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db = lancedb.connect(tmp_path)
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table = db.create_table(
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"people",
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[{"name": "ada", "age": 36}],
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storage_options={"new_table_enable_stable_row_ids": "true"},
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)
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view = db.create_materialized_view("adults", "people", where="age >= 18")
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first = table.version
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table.add([{"name": "bea", "age": 41}])
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view.refresh()
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assert view.table.count_rows() == 2
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result = view.refresh(source_version=first)
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assert (result.source_version, result.rows_written) == (first, 1)
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assert view.table.count_rows() == 1
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