---
phase: 43-metadata-foundation
verified: 2026-04-10T10:30:00Z
status: passed
score: 5/5 must-haves verified
deferred:
  - truth: "Querying a PRIVATE fact produces a clear ExpandError (when fact querying exists)"
    addressed_in: "Phase 46"
    evidence: "Phase 46 success criteria: 'User can query semantic_view(v, facts := [f1, f2], dimensions := [d1]) and receive row-level unaggregated results' — PrivateFact variant defined in types.rs, enforcement wired in Phase 46 when facts query path is built"
human_verification: []
---

# Phase 43: Metadata Foundation Verification Report

**Phase Goal:** Semantic view definitions support COMMENT, SYNONYMS, and PRIVATE/PUBLIC annotations that persist correctly and remain backward-compatible with pre-v0.6.0 stored views
**Verified:** 2026-04-10T10:30:00Z
**Status:** passed
**Re-verification:** No — initial verification

## Goal Achievement

### Observable Truths

| #  | Truth                                                                                      | Status     | Evidence                                                                                         |
|----|--------------------------------------------------------------------------------------------|------------|--------------------------------------------------------------------------------------------------|
| 1  | User can write COMMENT = '...' on a semantic view and on individual entries in CREATE DDL  | ✓ VERIFIED | `extract_view_comment()` in parse.rs; `parse_trailing_annotations()` in body_parser.rs; sqllogictest test 1 + 2 pass |
| 2  | User can write WITH SYNONYMS = ('alias1', 'alias2') on tables, dimensions, metrics, facts  | ✓ VERIFIED | `parse_trailing_annotations()` handles WITH SYNONYMS; sqllogictest test 3 pass                   |
| 3  | User can mark facts and metrics as PRIVATE; excluded from query results, usable in derived  | ✓ VERIFIED | `parse_leading_access_modifier()` + `allow_access_modifier` gating; `AccessModifier::Private` check in `expand()`; PrivateMetric error; sqllogictest tests 5, 6, 7, 9 pass |
| 4  | A v0.5.5 stored view loads without error after upgrading (all new fields default)           | ✓ VERIFIED | All new fields have `#[serde(default)]`; `pre_v060_json_deserializes_with_defaults` test passes  |
| 5  | All metadata fields survive DuckDB restart (persist and deserialize correctly)              | ✓ VERIFIED | serde roundtrip tests pass; full sqllogictest pipeline (DDL→parse→JSON→persist→query) passes    |

**Score:** 5/5 truths verified

### Deferred Items

Items not yet met but explicitly addressed in later milestone phases.

| # | Item                                                                    | Addressed In | Evidence                                              |
|---|-------------------------------------------------------------------------|--------------|-------------------------------------------------------|
| 1 | PRIVATE fact enforcement at query time (PrivateFact ExpandError raised) | Phase 46     | Fact query path (FACT-01) does not exist yet; PrivateFact variant defined in types.rs ready for Phase 46 wiring |

### Required Artifacts

| Artifact                             | Expected                                                      | Status     | Details                                                                                        |
|--------------------------------------|---------------------------------------------------------------|------------|-----------------------------------------------------------------------------------------------|
| `src/model.rs`                       | AccessModifier enum, metadata fields on all structs           | ✓ VERIFIED | `pub enum AccessModifier` with Public/Private, `is_default()`; comment + synonyms on 5 structs; access on Metric + Fact |
| `src/body_parser.rs`                 | Trailing annotation parsing, leading PRIVATE/PUBLIC keyword   | ✓ VERIFIED | `ParsedAnnotations` struct, `parse_trailing_annotations()`, `parse_leading_access_modifier()`; `allow_access_modifier` param gates PRIVATE rejection on DIMENSIONS |
| `src/parse.rs`                       | View-level COMMENT extraction, metadata passed through        | ✓ VERIFIED | `extract_view_comment()`, `comment: view_comment` in `SemanticViewDefinition` constructor     |
| `src/expand/types.rs`                | ExpandError::PrivateMetric and PrivateFact variants           | ✓ VERIFIED | Both variants defined with full Display impl giving clear user-facing error messages           |
| `src/expand/sql_gen.rs`              | Access check after find_metric in expand()                    | ✓ VERIFIED | `if met.access == AccessModifier::Private { return Err(ExpandError::PrivateMetric {...}) }`   |
| `test/sql/phase43_metadata.test`     | 12-case integration test for full pipeline                    | ✓ VERIFIED | 12 test cases covering COMMENT, SYNONYMS, PRIVATE, derived metrics, PRIVATE rejection, escaped quotes, reversed order, PUBLIC keyword |

### Key Link Verification

| From                                      | To                             | Via                                     | Status     | Details                                                                       |
|-------------------------------------------|--------------------------------|-----------------------------------------|------------|-------------------------------------------------------------------------------|
| `body_parser.rs parse_trailing_annotations` | KeywordBody metadata fields   | `ParsedAnnotations` struct              | ✓ WIRED    | Called in `parse_single_qualified_entry`, `parse_single_metric_entry`, `parse_single_table_entry`; 5 call sites confirmed |
| `parse.rs rewrite_ddl_keyword_body`       | `SemanticViewDefinition.comment` | `view_comment` field passed through    | ✓ WIRED    | `extract_view_comment()` called at line 840; result passed as `comment: view_comment` at line 913 |
| `expand/sql_gen.rs expand()`              | `ExpandError::PrivateMetric`   | Access check after `find_metric`        | ✓ WIRED    | `if met.access == AccessModifier::Private` at line 82; returns Err immediately |

### Data-Flow Trace (Level 4)

Data flows from DDL text through parsing to JSON persistence:

| Component                  | Data Variable      | Source                          | Produces Real Data | Status      |
|----------------------------|--------------------|---------------------------------|--------------------|-------------|
| `parse_trailing_annotations` | `ParsedAnnotations` | Depth-0 keyword scan of DDL text | Yes               | ✓ FLOWING   |
| `extract_view_comment`      | `view_comment`      | COMMENT keyword in DDL text    | Yes               | ✓ FLOWING   |
| `SemanticViewDefinition`    | `comment`, `synonyms`, `access` | Parsed from DDL, written as JSON | Yes | ✓ FLOWING |
| `expand()` access check     | `met.access`        | Deserialized from stored JSON   | Yes               | ✓ FLOWING   |

### Behavioral Spot-Checks

| Behavior                                          | Command / Test                                    | Result  | Status  |
|---------------------------------------------------|---------------------------------------------------|---------|---------|
| COMMENT DDL parses and view queries successfully   | sqllogictest test 1                               | EU/US rows returned | ✓ PASS |
| Object-level COMMENT + SYNONYMS parse successfully | sqllogictest test 2                               | Query returns correct rows | ✓ PASS |
| PRIVATE metric blocked from direct query           | sqllogictest test 5                               | `statement error` matches "private" | ✓ PASS |
| Derived metric referencing PRIVATE base works      | sqllogictest test 6                               | Returns 180.00 | ✓ PASS |
| PRIVATE on dimension produces parse error          | sqllogictest test 9                               | `statement error` matches "PRIVATE" | ✓ PASS |
| Pre-v0.6.0 JSON backward compat                   | `cargo test model::tests::pre_v060`               | PASS — all defaults correct | ✓ PASS |

### Requirements Coverage

| Requirement | Source Plan | Description                                                        | Status      | Evidence                                                              |
|-------------|-------------|--------------------------------------------------------------------|-------------|-----------------------------------------------------------------------|
| META-01     | 43-01, 43-02 | User can add COMMENT = '...' to a semantic view in CREATE DDL      | ✓ SATISFIED | `extract_view_comment()` in parse.rs; sqllogictest test 1             |
| META-02     | 43-02        | User can add COMMENT = '...' to tables, dimensions, metrics, facts | ✓ SATISFIED | `parse_trailing_annotations()` in body_parser.rs; sqllogictest test 2 |
| META-03     | 43-02        | User can add WITH SYNONYMS = ('a', 'b') to entries                 | ✓ SATISFIED | `parse_synonym_list()` via `parse_trailing_annotations`; sqllogictest test 3 |
| META-04     | 43-02        | User can mark facts/metrics as PRIVATE or PUBLIC                   | ✓ SATISFIED | `parse_leading_access_modifier()` with `allow_access_modifier` flag; sqllogictest tests 4, 9, 12 |
| META-05     | 43-02        | PRIVATE items hidden from queries but usable in derived metrics     | ✓ SATISFIED | Access check in `expand()` raises `PrivateMetric`; derived metric bypasses check; sqllogictest tests 5-7 |
| META-06     | 43-01        | All metadata fields persist with backward-compatible JSON           | ✓ SATISFIED | `#[serde(default, skip_serializing_if)]` on all new fields; roundtrip tests pass |
| META-07     | 43-01        | Pre-v0.6.0 stored views load without error                          | ✓ SATISFIED | `pre_v060_json_deserializes_with_defaults` test; all fields `#[serde(default)]` |

**All 7 requirements satisfied. No orphaned requirements.**

### Anti-Patterns Found

| File | Pattern | Severity | Impact |
|------|---------|----------|--------|
| — | None found | — | — |

No TODO/FIXME/HACK/PLACEHOLDER comments found in any phase 43 modified files.
No stub return values (`return null`, `return []`, empty handlers).
No hardcoded empty data passed to rendering paths.

### Human Verification Required

None. All behaviors verified programmatically via sqllogictest and cargo test.

### Gaps Summary

No gaps. All 5 roadmap success criteria are verified. All 7 phase requirements are satisfied.

One item — PrivateFact enforcement at query time — is intentionally deferred to Phase 46, which is when the FACTS query path (FACT-01) will be built. The `PrivateFact` error variant is already defined and has a Display impl in `src/expand/types.rs`; only the call site in the fact expansion path is absent, because that code path does not yet exist.

---

## Quality Gate

- `cargo test`: 518 tests pass (0 failures) across all test binaries
- `just test-sql` (sqllogictest): 20 test files pass (0 failures), including `phase43_metadata.test`

---

_Verified: 2026-04-10T10:30:00Z_
_Verifier: Claude (gsd-verifier)_
