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docs(schema): document enum widening — migration step list, OG-MF-106 scope, test map

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Same-PR docs for the ExtendEnum step: the supported-steps list in the
schema migration section (with the narrowing/rename/String-conversion
carve-outs and the order-insensitivity note), the OG-MF-106 lint-table
row narrowed to what it still covers, and the schema_apply.rs test-map
row extended with the two new tests.
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aaltshuler 2026-07-05 01:16:13 +03:00 • committed by Andrew Altshuler
parent cc6f8602a9
commit f7ddabafae
3 changed files with 3 additions and 2 deletions
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docs/dev/testing.md
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@ -36,7 +36,7 @@ The engine's `tests/` is the principal coverage surface; most graph-shaped behav
| `changes.rs` | `diff_between` / `diff_commits` |
| `consistency.rs` | Cross-table snapshot isolation, atomic publish |
| `lineage_projection.rs` | RFC-013 Phase 7 acceptance gate: graph lineage lives ONLY in `__manifest` — over a realistic history (main commits, a branch, a merge, actors), the production `CommitGraph::open` projection reconstructs the full DAG (commit set, parents, merge parents + merge actor, per-branch heads, inline actors) from the `graph_commit`/`graph_head` rows, and the `_graph_commits.lance` / `_graph_commit_actors.lance` dataset directories are never created at all |
| `schema_apply.rs` | Migration plan + apply, schema-apply lock; index materialization deferred to the reconciler (iss-848): `apply_schema_defers_vector_index_on_empty_table` (an empty-table Vector `@index` never aborts the apply) and `index_only_constraint_apply_touches_no_table_data` (adding an `@index` is metadata-only — no table-version bump) |
| `schema_apply.rs` | Migration plan + apply, schema-apply lock; index materialization deferred to the reconciler (iss-848): `apply_schema_defers_vector_index_on_empty_table` (an empty-table Vector `@index` never aborts the apply) and `index_only_constraint_apply_touches_no_table_data` (adding an `@index` is metadata-only — no table-version bump); enum widening (iss-enum-widening-migration): `enum_widening_apply_is_metadata_only_and_accepts_new_variant` (no table-version bump; new variant accepted, out-of-set still rejected) + `enum_narrowing_apply_is_refused` (OG-MF-106 with the graph left writable). The planner's widening/narrowing matrix lives in `schema_plan.rs`'s in-source tests |
| `search.rs` | FTS / vector / hybrid (`bm25`, `nearest`, `rrf`) |
| `scalar_indexes.rs` | Per-property index dispatch of `build_indices_on_dataset_for_catalog`: enums + orderable scalars get a BTREE (so `=`/range/IN/IS NULL are index-accelerated), free-text Strings keep FTS — observed via `TableStore::key_column_index_coverage`, the same helper the traversal chooser uses |
| `traversal.rs` | `Expand`, variable-length hops, anti-join (CSR path — `OMNIGRAPH_TRAVERSAL_MODE` unset) |