---
phase: 39-metadata-storage
verified: 2026-04-02T08:56:27Z
status: passed
score: 4/4 must-haves verified
gaps: []
human_verification:
  - test: "DuckLake CI integration suite"
    expected: "All integration tests pass with no errors"
    why_human: "UV sandbox permission error blocks automated run in this environment (not a code issue — uv cache path restricted). Must be run outside sandbox or on CI."
---

# Phase 39: Metadata Storage Verification Report

**Phase Goal:** Semantic view definitions carry timestamp and context metadata needed by downstream SHOW/DESCRIBE commands, with full backward compatibility for pre-v0.5.5 stored views
**Verified:** 2026-04-02T08:56:27Z
**Status:** passed
**Re-verification:** No — initial verification

## Goal Achievement

### Observable Truths

| # | Truth | Status | Evidence |
|---|-------|--------|----------|
| 1 | Newly created semantic views carry `created_on`, `database_name`, `schema_name` metadata | VERIFIED | `src/model.rs` lines 197, 201, 205 — all `Option<String>` with `#[serde(default)]`; `src/ddl/define.rs` lines 240–266 — captured via `strftime(now()`, `current_database()`, `current_schema()` on `catalog_conn` |
| 2 | Fact structs carry an `output_type` field for downstream SHOW FACTS display | VERIFIED | `src/model.rs` line 80 — `pub output_type: Option<String>` with `#[serde(default)]`; `src/ddl/define.rs` lines 290–330 — inferred via `typeof(expr) FROM table LIMIT 1`, graceful fallback to None |
| 3 | Pre-v0.5.5 stored JSON without new fields deserializes to None without error | VERIFIED | `src/model.rs` lines 852–888 — `old_json_without_metadata_fields_deserializes` and `old_fact_json_without_output_type_deserializes` unit tests; all 4 phase39 metadata tests pass |
| 4 | All existing tests pass with zero behavior changes | VERIFIED | `cargo test`: 394 unit + 5 integration + 36 proptest + 42 model + 5 output + 1 doc = 483 total, 0 failed; `just test-sql`: 18 sqllogictests pass including new `phase39_metadata_storage.test` |

**Score:** 4/4 truths verified

### Required Artifacts

| Artifact | Expected | Status | Details |
|----------|----------|--------|---------|
| `src/model.rs` | `SemanticViewDefinition` with `created_on`, `database_name`, `schema_name`; `Fact` with `output_type` | VERIFIED | All four `Option<String>` fields present at lines 80, 197, 201, 205; all have `#[serde(default)]` |
| `src/ddl/define.rs` | Metadata capture at bind time via `execute_sql_raw` on `catalog_conn` | VERIFIED | Lines 238–330: single SQL for timestamp + db + schema, plus fact `typeof()` inference loop |
| `test/sql/phase39_metadata_storage.test` | End-to-end sqllogictest for metadata storage | VERIFIED | File exists; contains `require semantic_views`; 3 create/drop/replace cycles with data queries; passes in `just test-sql` |

### Key Link Verification

| From | To | Via | Status | Details |
|------|----|-----|--------|---------|
| `src/ddl/define.rs` | `src/model.rs` | `def.created_on = Some(...)` | WIRED | Lines 249, 255, 261 set `def.created_on`, `def.database_name`, `def.schema_name` respectively |
| `src/body_parser.rs` | `src/model.rs` | `Fact { ... output_type: None }` | WIRED | Lines 334, 344, 354 — all three Fact construction sites include `output_type: None` |

### Data-Flow Trace (Level 4)

Not applicable to this phase. Artifacts are model struct definitions, serialization helpers, and DDL capture code — not UI components or query renderers. The metadata fields flow into JSON-serialized storage and are available for downstream phases 40 and 41 to consume. The sqllogictest end-to-end test confirms the round-trip create→store→query pipeline with new fields works correctly.

### Behavioral Spot-Checks

| Behavior | Command | Result | Status |
|----------|---------|--------|--------|
| 483 Rust tests pass | `cargo test` | 394+5+36+42+5+1 = 483 passed, 0 failed | PASS |
| 18 sqllogictests pass including phase39 | `just test-sql` | 18 tests run, 0 failed | PASS |
| Phase39 metadata unit tests (4 tests) | `cargo test phase39_metadata_tests` | 4 passed, 0 failed | PASS |
| DuckLake CI | `just test-ducklake-ci` | UV sandbox permission error | SKIP (not a code issue) |

### Requirements Coverage

| Requirement | Source Plan | Description | Status | Evidence |
|-------------|-------------|-------------|--------|----------|
| META-01 | 39-01-PLAN.md | `SemanticViewDefinition` stores `created_on` timestamp (Option String, ISO 8601) set at define time | SATISFIED | `src/model.rs` line 197; `src/ddl/define.rs` line 249 — `strftime(now(), '%Y-%m-%dT%H:%M:%SZ')` |
| META-02 | 39-01-PLAN.md | `SemanticViewDefinition` stores `database_name` (Option String) set at define time | SATISFIED | `src/model.rs` line 201; `src/ddl/define.rs` line 255 — `current_database()` |
| META-03 | 39-01-PLAN.md | `SemanticViewDefinition` stores `schema_name` (Option String) set at define time | SATISFIED | `src/model.rs` line 205; `src/ddl/define.rs` line 261 — `current_schema()` |
| META-04 | 39-01-PLAN.md | `Fact` model gains `output_type` field (Option String) for `data_type` in SHOW FACTS | SATISFIED | `src/model.rs` line 80; `src/ddl/define.rs` lines 290–324 — `typeof(expr)` inference |
| META-05 | 39-01-PLAN.md | Old stored JSON without new fields deserializes via `serde(default)` with no migration | SATISFIED | `#[serde(default)]` on all four new fields; unit tests `old_json_without_metadata_fields_deserializes` and `old_fact_json_without_output_type_deserializes` exercise backward compat path |

All 5 requirements for Phase 39 are satisfied. No orphaned requirements found — REQUIREMENTS.md traceability table maps META-01 through META-05 exclusively to Phase 39 and marks all as Complete.

### Anti-Patterns Found

No anti-patterns detected. Scanned `src/model.rs`, `src/ddl/define.rs`, `src/body_parser.rs`, `src/parse.rs`, `src/graph/test_helpers.rs`, `src/graph/relationship.rs`, `src/expand/sql_gen.rs` for TODO/FIXME, placeholder comments, empty return stubs, and hardcoded empty data flows — all clear.

### Human Verification Required

#### 1. DuckLake CI Integration Suite

**Test:** Run `just test-ducklake-ci` outside of the UV sandbox restriction (e.g., on the CI server or with sandbox disabled)
**Expected:** All DuckLake integration tests pass; the UV cache path `~/.cache/uv/sdists-v9/.git` is accessible and the test suite completes without permission errors
**Why human:** The UV runner fails with "Operation not permitted" for `~/.cache/uv/sdists-v9/.git` in this sandboxed environment. The SUMMARY documents this as a known sandbox issue unrelated to the code changes. Verification in a normal shell environment is required to fully close this.

### Gaps Summary

No gaps. All four observable truths are verified against the actual codebase:

- All four new model fields (`created_on`, `database_name`, `schema_name` on `SemanticViewDefinition`; `output_type` on `Fact`) are present with correct types and `#[serde(default)]` annotations.
- `src/ddl/define.rs` captures metadata via a single SQL query on `catalog_conn` at bind time and infers fact `output_type` via `typeof()` with graceful degradation.
- Every explicit struct construction across the codebase (relationship.rs, test_helpers.rs, sql_gen.rs, parse.rs, body_parser.rs) has been updated.
- Backward-compatibility unit tests and roundtrip tests are present and pass.
- The new `phase39_metadata_storage.test` sqllogictest exercises create/drop/replace cycles with queries and is included in TEST_LIST.
- `cargo test` passes 483 tests; `just test-sql` passes all 18 sqllogictests.
- The DuckLake CI failure is a UV sandbox permission issue in this environment, not a code regression.

---

_Verified: 2026-04-02T08:56:27Z_
_Verifier: Claude (gsd-verifier)_
