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Rename all IVF shadow tables in vec0Rename

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vec0Rename only emitted ALTER TABLE on `<name>_ivf_cells%02d`, so renaming
an IVF-indexed vec0 table left `_ivf_centroids`, `_ivf_rowid_map`, and
`_ivf_vectors` (when quantizer != none) with the old prefix. Subsequent
queries against the renamed table broke, and DROP TABLE left those three
shadows orphaned in the schema. Same shape as the DiskANN/rescore bug fixed
in #294, just for the IVF branch.

Mirror ivf_create_shadow_tables: emit ALTER for all four IVF shadows,
gating `_ivf_vectors` on quantizer != VEC0_IVF_QUANTIZER_NONE.

Adds test-ivf-rename.py (auto-skipped on default builds via conftest's
test-ivf prefix rule) covering quantizer=none, quantizer=binary, and
DROP-after-rename. Also adds a rescore rename regression test to
test-rename.py to lock down the (already-correct) rescore path.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
This commit is contained in:
Alex Garcia 2026-05-17 23:09:27 -07:00
parent 8105eee61e
commit 8b81f40d1e
3 changed files with 144 additions and 0 deletions
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33
tests/test-rename.py
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@ -191,6 +191,39 @@ def test_rename_diskann(db):
assert _shadow_tables(db, "v") == []
def test_rename_rescore(db):
"""Rename should work on rescore-indexed tables (no _vector_chunks shadow)."""
db.execute("""
CREATE VIRTUAL TABLE v USING vec0(
a float[8] indexed by rescore(quantizer=bit)
)
""")
db.execute("insert into v(rowid, a) values (1, ?)", [_f32([0.1] * 8)])
db.execute("insert into v(rowid, a) values (2, ?)", [_f32([0.9] * 8)])
# Rescore columns use _rescore_chunks / _rescore_vectors instead of
# _vector_chunks; the rename must skip the missing _vector_chunks ALTER
# and rename both rescore shadow tables.
before = _shadow_tables(db, "v")
assert "v_rescore_chunks00" in before
assert "v_rescore_vectors00" in before
assert "v_vector_chunks00" not in before
db.execute("ALTER TABLE v RENAME TO v2")
rows = db.execute(
"select rowid from v2 where a match ? and k=10",
[_f32([0.1] * 8)],
).fetchall()
assert rows[0][0] == 1
after = _shadow_tables(db, "v2")
assert "v2_rescore_chunks00" in after
assert "v2_rescore_vectors00" in after
assert "v2_vector_chunks00" not in after
assert _shadow_tables(db, "v") == []
def test_rename_drop_after(db):
"""DROP TABLE should work on a renamed table."""
db.execute("create virtual table v using vec0(a float[2], chunk_size=8)")