---
phase: 52-yaml-ddl-integration
verified: 2026-04-18T20:30:00Z
status: passed
score: 7/7 must-haves verified
re_verification: false
---

# Phase 52: YAML DDL Integration Verification Report

**Phase Goal:** Users can create semantic views from inline YAML via native DDL
**Verified:** 2026-04-18T20:30:00Z
**Status:** passed
**Re-verification:** No — initial verification

## Goal Achievement

### Observable Truths

| #  | Truth                                                                                          | Status     | Evidence                                                                                              |
|----|------------------------------------------------------------------------------------------------|------------|-------------------------------------------------------------------------------------------------------|
| 1  | CREATE SEMANTIC VIEW name FROM YAML $$ yaml $$ creates a queryable semantic view              | VERIFIED | parse.rs:1055-1065 detects FROM YAML; rewrite_ddl_yaml_body routes to function call; sqllogictest p52_yaml_basic confirmed |
| 2  | CREATE OR REPLACE SEMANTIC VIEW name FROM YAML $$ yaml $$ replaces an existing view           | VERIFIED | DdlKind::CreateOrReplace routed to create_or_replace_semantic_view_from_json (parse.rs:1219); sqllogictest p52_yaml_basic REPLACE confirmed |
| 3  | CREATE SEMANTIC VIEW IF NOT EXISTS name FROM YAML $$ yaml $$ is a no-op when view exists      | VERIFIED | DdlKind::CreateIfNotExists routed to create_semantic_view_if_not_exists_from_json (parse.rs:1221); sqllogictest IF NOT EXISTS no-op confirmed |
| 4  | Invalid YAML in a dollar-quoted block returns a clear error mentioning the view name           | VERIFIED | rewrite_ddl_yaml_body propagates from_yaml_with_size_cap error message (parse.rs:1192-1197); unit test test_yaml_rewrite_invalid_yaml passes |
| 5  | The error message for missing body mentions both AS and FROM YAML syntax                       | VERIFIED | parse.rs:1070 error message: "Expected 'AS' or 'FROM YAML' after view name…"; unit test test_error_message_mentions_from_yaml passes |
| 6  | Trailing content after closing $$ is rejected as a parse error                                | VERIFIED | trailing check at parse.rs:1184-1190; unit test test_yaml_rewrite_trailing_content_rejected passes |
| 7  | Tagged dollar-quoting ($yaml$...$yaml$) works identically to untagged $$...$$                 | VERIFIED | extract_dollar_quoted handles any tag (parse.rs:1147-1169); unit test test_extract_dollar_quoted_tagged and sqllogictest p52_yaml_tagged confirmed |

**Score:** 7/7 truths verified

### Roadmap Success Criteria Coverage

All four roadmap success criteria verified:

| # | Success Criterion                                                                  | Status     | Evidence                                       |
|---|------------------------------------------------------------------------------------|------------|------------------------------------------------|
| 1 | CREATE ... FROM YAML $$ ... $$ creates a queryable semantic view                   | VERIFIED | sqllogictest: SELECT from p52_yaml_basic returns data |
| 2 | CREATE OR REPLACE ... FROM YAML replaces an existing view                          | VERIFIED | sqllogictest: p52_yaml_basic replaced with order_count metric |
| 3 | CREATE ... IF NOT EXISTS ... FROM YAML is a no-op when view exists                 | VERIFIED | sqllogictest: IF NOT EXISTS leaves order_count metric in place |
| 4 | The parser hook correctly detects FROM YAML and routes through the YAML parsing path | VERIFIED | parse.rs:1055-1065 is_yaml_body branch; unit test test_from_yaml_detection_via_rewrite_ddl |

### Required Artifacts

| Artifact                                | Expected                                              | Status     | Details                                                                    |
|-----------------------------------------|-------------------------------------------------------|------------|----------------------------------------------------------------------------|
| `src/parse.rs`                          | extract_dollar_quoted, rewrite_ddl_yaml_body, FROM YAML detection | VERIFIED | All three functions present at lines 1055, 1147, 1176; substantive implementations |
| `src/parse.rs`                          | YAML rewrite function (rewrite_ddl_yaml_body)        | VERIFIED | 50-line implementation at line 1176; calls from_yaml_with_size_cap, infer_cardinality |
| `test/sql/phase52_yaml_ddl.test`        | sqllogictest integration tests for YAML DDL           | VERIFIED | 13 tests covering all CREATE variants, tagged quoting, case-insensitivity, 3 error cases |
| `test/sql/TEST_LIST`                    | updated test registry                                 | VERIFIED | Line 31: test/sql/phase52_yaml_ddl.test present                            |

### Key Link Verification

| From                                          | To                                         | Via                           | Status     | Details                                                              |
|-----------------------------------------------|--------------------------------------------|-------------------------------|------------|----------------------------------------------------------------------|
| parse.rs::validate_create_body                | parse.rs::rewrite_ddl_yaml_body            | FROM YAML detection branch    | WIRED      | parse.rs:1062-1063: is_yaml_body branch calls rewrite_ddl_yaml_body |
| parse.rs::rewrite_ddl_yaml_body               | model.rs::from_yaml_with_size_cap          | YAML deserialization call     | WIRED      | parse.rs:1193: crate::model::SemanticViewDefinition::from_yaml_with_size_cap |
| parse.rs::rewrite_ddl_yaml_body               | parse.rs::infer_cardinality                | cardinality inference         | WIRED      | parse.rs:1209: infer_cardinality(&def.tables, &mut def.joins)       |

### Data-Flow Trace (Level 4)

Not applicable — this phase produces a parser/rewriter, not a UI component rendering dynamic data. The end-to-end data flow is verified by sqllogictest integration tests that confirm real data is returned from semantic_view() queries over tables populated with INSERT statements.

### Behavioral Spot-Checks

| Behavior                                              | Command                                                    | Result                  | Status  |
|-------------------------------------------------------|------------------------------------------------------------|-------------------------|---------|
| 739 Rust unit tests pass                              | cargo test                                                 | 739 passed, 0 failed    | PASS    |
| 31 sqllogictest files pass (incl. phase52_yaml_ddl.test) | just test-sql                                           | 31 tests run, 0 failed  | PASS    |
| Full quality gate (just test-all)                     | just test-all                                              | All suites green        | PASS    |

### Requirements Coverage

| Requirement | Source Plan | Description                                                                           | Status    | Evidence                                                              |
|-------------|-------------|---------------------------------------------------------------------------------------|-----------|-----------------------------------------------------------------------|
| YAML-01     | 52-01-PLAN  | User can create a semantic view from inline YAML using CREATE SEMANTIC VIEW name FROM YAML $$ ... $$ | SATISFIED | parse.rs FROM YAML detection + rewrite pipeline; sqllogictest p52_yaml_basic query returns real data |
| YAML-06     | 52-01-PLAN  | CREATE OR REPLACE and IF NOT EXISTS modifiers work with FROM YAML syntax              | SATISFIED | Both DDL variants route through rewrite_ddl_yaml_body with correct function names; sqllogictest coverage confirms |

No orphaned requirements: REQUIREMENTS.md traceability table maps YAML-01 and YAML-06 to Phase 52, and both are fully addressed.

### Anti-Patterns Found

No anti-patterns detected in Phase 52 modified files:
- `src/parse.rs` — no TODO/FIXME/placeholder comments in new code; all new functions are substantive
- `test/sql/phase52_yaml_ddl.test` — no placeholder test assertions; all queries verify real data values
- `test/sql/TEST_LIST` — correctly updated

One extra commit beyond the plan summary (`c6aecf9`) cleaned up the `phase21_error_reporting.test` sqllogictest assertions and applied `cargo fmt` and `clippy` fixes necessitated by the error message change. This is a legitimate bug fix deviation and does not represent scope creep.

### Human Verification Required

None. All behaviors are fully verified by automated tests:
- Unit tests cover all parsing edge cases
- sqllogictest integration tests cover the full DDL-to-query pipeline through the loaded extension
- `just test-all` quality gate passes cleanly

### Gaps Summary

No gaps. All 7 observable truths verified, all 4 roadmap success criteria met, both requirements (YAML-01, YAML-06) satisfied, all artifacts substantive and wired, full quality gate green.

---

_Verified: 2026-04-18T20:30:00Z_
_Verifier: Claude (gsd-verifier)_
