---
phase: 54-materialization-model-ddl
verified: 2026-04-19T00:00:00Z
status: passed
score: 6/6 must-haves verified
gaps: []
deferred: []
human_verification: []
---

# Phase 54: Materialization Model & DDL Verification Report

**Phase Goal:** Users can declare materializations as part of a semantic view definition
**Verified:** 2026-04-19
**Status:** passed
**Re-verification:** No — initial verification

## Goal Achievement

### Observable Truths

| #   | Truth                                                                                                        | Status     | Evidence                                                                                    |
| --- | ------------------------------------------------------------------------------------------------------------ | ---------- | ------------------------------------------------------------------------------------------- |
| 1   | MATERIALIZATIONS clause in SQL DDL accepts named materializations with TABLE, DIMENSIONS, and METRICS        | ✓ VERIFIED | `parse_materializations_clause` in body_parser.rs; CLAUSE_KEYWORDS/CLAUSE_ORDER include "materializations" last; sqllogictest sections 1-2, 7 |
| 2   | MATERIALIZATIONS section in YAML definitions produces the same internal representation as SQL DDL clause      | ✓ VERIFIED | `Materialization` struct has serde derives; `from_yaml` uses same struct as `from_json`; model.rs test `yaml_and_json_with_materializations_produce_identical_structs`; proptest `yaml_json_roundtrip_equivalence` covers materializations via updated `arb_definition`; sqllogictest section 8 |
| 3   | Materialization metadata persists across DuckDB restarts (stored with backward compat for pre-v0.7.0 views)  | ✓ VERIFIED | `#[serde(default, skip_serializing_if = "Vec::is_empty")]` on `materializations` field in `SemanticViewDefinition`; model.rs test `old_json_without_materializations_deserializes_to_empty_vec`; model.rs test `empty_materializations_omitted_from_json`; sqllogictest section 4 |
| 4   | Define-time validation ensures materialization dimensions and metrics reference declared names                | ✓ VERIFIED | body_parser.rs lines 562-622: duplicate name check, dimension reference check with `suggest_closest`, metric reference check with `suggest_closest`; sqllogictest section 5 (4 `statement error` blocks) |
| 5   | GET_DDL round-trip preserves materializations (render -> parse -> render produces identical output)           | ✓ VERIFIED | `emit_materializations` in render_ddl.rs; `test_materializations_ddl_roundtrip` unit test; sqllogictest sections 3, 8, 9 |
| 6   | Proptest verifies Materialization JSON/YAML round-trip for arbitrary inputs                                  | ✓ VERIFIED | `arb_materialization()` strategy in tests/yaml_proptest.rs; `materialization_json_roundtrip` proptest; `arb_definition` updated to include materializations; `yaml_json_roundtrip_equivalence` covers materializations; `cargo test` shows 2 proptests passing |

**Score:** 6/6 truths verified

### Required Artifacts

| Artifact                               | Expected                                                         | Status     | Details                                                                                  |
| -------------------------------------- | ---------------------------------------------------------------- | ---------- | ---------------------------------------------------------------------------------------- |
| `src/model.rs`                         | Materialization struct with serde derives, materializations field | ✓ VERIFIED | `pub struct Materialization` at line 213 with Debug, Clone, Default, PartialEq, Serialize, Deserialize, cfg_attr(arbitrary::Arbitrary); `pub materializations: Vec<Materialization>` at line 382 on SemanticViewDefinition with `#[serde(default, skip_serializing_if = "Vec::is_empty")]` |
| `src/body_parser.rs`                   | MATERIALIZATIONS clause parsing                                  | ✓ VERIFIED | `pub(crate) fn parse_materializations_clause` at line 2179; "materializations" in CLAUSE_KEYWORDS (line 61) and CLAUSE_ORDER (line 74); `pub materializations: Vec<Materialization>` field on KeywordBody (line 43) |
| `src/parse.rs`                         | materializations field wired into rewrite_ddl_keyword_body       | ✓ VERIFIED | `materializations: keyword_body.materializations` at line 1124                           |
| `src/render_ddl.rs`                    | DDL reconstruction for MATERIALIZATIONS clause                   | ✓ VERIFIED | `fn emit_materializations` at line 252; called from `render_create_ddl` at lines 327-329 when non-empty |
| `tests/yaml_proptest.rs`               | Proptest with Materialization strategy and in arb_definition     | ✓ VERIFIED | `arb_materialization()` at line 177; `arb_definition` includes materializations at lines 201, 212; `materialization_json_roundtrip` proptest at line 248 |
| `test/sql/phase54_materializations.test` | Integration tests for MATERIALIZATIONS DDL, persistence, round-trip | ✓ VERIFIED | 313 lines (exceeds min_lines: 50); contains `require semantic_views`, 4 `statement error` validation blocks, `FROM YAML` section, GET_DDL round-trip checks, qualified table name test |

### Key Link Verification

| From                     | To              | Via                                          | Status     | Details                                                       |
| ------------------------ | --------------- | -------------------------------------------- | ---------- | ------------------------------------------------------------- |
| `src/body_parser.rs`     | `src/model.rs`  | `use crate::model::Materialization`          | ✓ WIRED    | Line 8: Materialization in use statement for crate::model     |
| `src/parse.rs`           | `src/body_parser.rs` | `keyword_body.materializations` in rewrite_ddl_keyword_body | ✓ WIRED | Line 1124: `materializations: keyword_body.materializations` in SemanticViewDefinition construction |
| `src/render_ddl.rs`      | `src/model.rs`  | reads `def.materializations` to emit DDL     | ✓ WIRED    | Lines 254, 280 iterate `def.materializations`; line 327 checks `def.materializations.is_empty()` |
| `tests/yaml_proptest.rs` | `src/model.rs`  | uses Materialization in arb_definition strategy | ✓ WIRED | Line 184: `Materialization { name, table, dimensions, metrics }` in prop_map; line 212: `materializations` field set in SemanticViewDefinition construction |

### Data-Flow Trace (Level 4)

Level 4 is not applicable for this phase. All artifacts are model/parser infrastructure (structs, parsers, serializers) with no dynamic rendering components. Query behavior is deferred to Phase 55.

### Behavioral Spot-Checks

| Behavior                                      | Command                                                      | Result                                  | Status   |
| --------------------------------------------- | ------------------------------------------------------------ | --------------------------------------- | -------- |
| Materialization JSON proptest passes          | `cargo test materialization_json_roundtrip`                   | 1 passed                                | ✓ PASS   |
| All cargo tests green (no regressions)        | `cargo test` (all test binaries)                             | 780 passed, 0 failed                    | ✓ PASS   |
| SQL logic tests including phase54 pass        | `just test-sql`                                              | 33 tests run, 0 failed (incl. phase54)  | ✓ PASS   |

### Requirements Coverage

| Requirement | Source Plan   | Description                                                                    | Status       | Evidence                                                            |
| ----------- | ------------- | ------------------------------------------------------------------------------ | ------------ | ------------------------------------------------------------------- |
| MAT-01      | 54-01-PLAN.md | User can declare materializations via MATERIALIZATIONS clause (TABLE/DIMS/METS) | ✓ SATISFIED  | body_parser.rs `parse_materializations_clause`; sqllogictest sections 1-9; render_ddl.rs `emit_materializations` |
| MAT-06      | 54-01-PLAN.md | MATERIALIZATIONS clause works in both SQL DDL and YAML definitions             | ✓ SATISFIED  | YAML via serde derives on Materialization; `from_yaml` uses same struct; model.rs `yaml_and_json_with_materializations_produce_identical_structs`; sqllogictest section 8 |
| MAT-07      | 54-01-PLAN.md | Materialization metadata persists across DuckDB restarts                       | ✓ SATISFIED  | `#[serde(default, skip_serializing_if = "Vec::is_empty")]` on SemanticViewDefinition.materializations; backward compat test; sqllogictest section 4 |

No orphaned requirements — all 3 Phase 54 requirements from REQUIREMENTS.md traceability table (MAT-01, MAT-06, MAT-07) are declared in the plan and verified.

### Anti-Patterns Found

None. Scanned src/model.rs, src/body_parser.rs, src/parse.rs, src/render_ddl.rs, tests/yaml_proptest.rs, and test/sql/phase54_materializations.test for TODO/FIXME/PLACEHOLDER/empty implementations/hardcoded data. No issues found.

### Human Verification Required

None. All must-haves are verifiable programmatically through code inspection and test results.

### Gaps Summary

No gaps. All 6 must-have truths are fully verified, all 6 required artifacts exist with substantive implementations and proper wiring, all 3 key links are confirmed, all 3 requirements are satisfied, and the full test suite passes (780 Rust tests + 33 SQL logic tests including phase54_materializations).

---

_Verified: 2026-04-19_
_Verifier: Claude (gsd-verifier)_
