b706e3e88cdff69f6fa8a4114b729f576fbc3695
1 Commits
| Author | SHA1 | Message | Date | |
|---|---|---|---|---|
| 3cd5117a7e |
feat(p3-3): kb-store-vector — LanceDB VectorStore + V003 embedding status
First VectorStore implementation. Per-model Lance tables under config.storage.vector_dir, two-phase upsert (SQLite-pending → Lance MergeInsert → SQLite-committed) with crash-safe retry, search via cosine distance with the spec's score-shift (preserves negative similarity ranking signal that clamping would crush). V003 migration: - Adds status (CHECK constraint pending|committed|tombstone, default pending) and vector_committed columns to embedding_records. - BEFORE DELETE trigger on chunks flips dependent rows to tombstone. Currently overshadowed by V001's ON DELETE CASCADE FK; trigger UPDATE runs first then row vanishes via CASCADE. Spec-faithful tombstone preservation requires recreating embedding_records to drop the CASCADE — deferred to a P+ migration since no production rows exist yet (P3-3 is the first writer). V003 SQL comment explains. LanceVectorStore: - ensure_table is idempotent: opens existing or creates with the Arrow schema (chunk_id, doc_id, embedding FixedSizeList<Float32, dim>, model_id, embedding_version, text, heading_path, created_at). - IndexId computed via id_for_index with collection="chunk_embeddings", index_kind="flat", params_hash = blake3(descriptor JSON). Schema bumps automatically rotate the IndexId. - upsert: phase-1 INSERT OR REPLACE INTO embedding_records (status= 'pending') in a single SQLite tx; phase-2 Lance MergeInsert keyed on chunk_id (idempotent re-run); phase-3 UPDATE status='committed', vector_committed=1. If phase-2 fails the rows stay 'pending' and the next upsert call retries idempotently. - search joins embedding_records WHERE status='committed' so partial- write rows never surface. Cosine distance from Lance ∈ [0, 2] → similarity = 1 - distance ∈ [-1, 1] → score = (similarity + 1)/2 ∈ [0, 1]. NaN coerced to 0 with tracing::warn. Filter by SearchFilters via SqliteStore::filter_chunks (added in this commit). - Sync trait + async LanceDB bridged by an embedded current-thread tokio runtime. Doc-comment on the struct flags the "do NOT call from inside another tokio runtime" panic (block_on cannot nest). kb-app's job scheduler is sync today. kb-store-sqlite additions: - pub fn put_embedding_records_pending(&[EmbeddingRecordRow]) — phase-1 INSERT OR REPLACE (status='pending', vector_committed=0). - pub fn mark_embedding_records_committed(&[EmbeddingId]) — phase-3 single UPDATE … WHERE embedding_id IN (?, ?, …) via params_from_iter, guarded by WHERE status='pending' so tombstones don't get clobbered. - pub fn filter_chunks(&[ChunkId], &SearchFilters) → Vec<ChunkId> consolidates the JOIN against documents/document_tags/ embedding_records + path_glob via globset. Lets kb-store-vector honor SearchFilters without depending on rusqlite or globset directly. (kb-search's filter logic is structurally different — interleaved with the FTS5 SELECT — so it stays as-is for now; consolidation is a P+ refactor.) - 4 new unit tests cover the phase-1 round-trip, empty batch, replay reset of pending rows, and the WHERE-status-pending guard. Tests: - 9 lib unit tests in kb-store-vector covering paths/sanitization, arrow_batch dim validation + descriptor hash, bm25-style cosine score shift math. - 4 new kb-store-sqlite unit tests on filter_chunks (committed-only, tags/lang/trust/path_glob, order preservation, empty input). - 4 new kb-store-sqlite unit tests on the embedding_records helpers. - 8 integration tests in upsert_search.rs and 1 snapshot test marked #[ignore = "requires AVX-capable hardware (LanceDB)"]. They invoke require_avx_or_panic() at the top of each body so a missing-AVX --ignored run fails loudly instead of silently passing. This dev host (qemu64 model) lacks AVX so these were NOT exercised end-to- end here — first CI lane on AVX hardware will validate them. - Snapshot fixture tests/fixtures/vector/run-1.json is a placeholder with an _comment marker. Snapshot test panics until the placeholder is replaced via KB_UPDATE_SNAPSHOTS=1 on AVX hardware. - Workspace 241 passed, 19 ignored, 0 failed; cargo clippy --workspace --all-targets -- -D warnings clean. Allowed deps respected (kb-core, kb-config, kb-store-sqlite, lancedb, arrow + arrow-array + arrow-schema, serde, serde_json, tracing, thiserror) plus forced waivers — anyhow (trait return type), tokio + futures (LanceDB async-only API), blake3 (params_hash). rusqlite and globset are NOT direct deps of kb-store-vector — confirmed via cargo metadata --no-deps. rusqlite stays in [dev-dependencies] for the test fixture seeder only. Out of scope: IVF/PQ index tuning (P+), image vectors (P6), kb-app embed_index orchestration (P3-4 facade). Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com> |
