---
phase: 65-overridecontext-connection-teardown
verified: 2026-05-25T00:00:00Z
status: passed
score: 13/13 must-haves verified
overrides_applied: 0
re_verification: null
gaps: []
deferred: []
human_verification: []
---

# Phase 65: OverrideContext Connection Teardown Verification Report

**Phase Goal:** Retire both long-lived extension-owned `duckdb_connection` handles (H1 catalog_conn and H2 query_conn) so the in-process `connect(path) → LOAD → CREATE SEMANTIC VIEW → close → connect(path, read_only=True)` resolves the reopen-hang (LIFE-01..04). Preserve v0.8.0 transactional DDL semantics byte-identical.
**Verified:** 2026-05-25T00:00:00Z
**Status:** PASSED
**Re-verification:** No — initial verification

---

## Goal Achievement

### Observable Truths

| # | Truth | Status | Evidence |
|---|-------|--------|----------|
| 1 | `init_extension` allocates ZERO long-lived `duckdb_connection` handles | ✓ VERIFIED | `sv_register_parser_hooks(db_handle)` at lib.rs:450 takes only `db_handle`; no `duckdb_connect(db_handle, …)` call inside `init_extension`; structural guard `cargo test --test no_long_lived_conn` PASSES |
| 2 | `sv_register_table_function` helper exists in `cpp/src/shim.cpp` + 17 read-side `sv_register_<name>` wrappers | ✓ VERIFIED | Generic helper at shim.cpp:563; 17 read-side wrappers + `sv_register_parser_hooks` confirmed at lines 1062–2465 |
| 3 | `cpp/src/shim.hpp` declares all extern "C" entry points | ✓ VERIFIED | 18 declarations including `sv_register_table_function`, `sv_register_list_semantic_views` through `sv_register_semantic_view` and `sv_register_parser_hooks` |
| 4 | `parser_override` (`src/parse.rs`) has zero catalog reads — emits metadata-via-SQL inside INSERT via `json_merge_patch` on caller's conn | ✓ VERIFIED | `OverrideContext` is empty struct (parse.rs:53); `rewrite_create` takes no catalog; `json_merge_patch` pattern at parse.rs:1893, 2019, 2263, 2279; `existence_guard_select` replaces `catalog.exists()` calls |
| 5 | ALTER SET/UNSET COMMENT and CREATE FROM YAML FILE use pure-SQL UPDATE/INSERT patterns | ✓ VERIFIED | `rewrite_alter_comment` at parse.rs:2216-2279 emits `UPDATE … SET definition = json_merge_patch(…)`; `rewrite_yaml_file_create` emits INSERT … SELECT FROM `__sv_compute_create_from_yaml` subquery |
| 6 | All 17 legacy VTab/VScalar structs deleted; no `#[allow(dead_code)]` markers from Plan 05 | ✓ VERIFIED | No `register_table_function_with_extra_info` or `QueryState` references in src/; `#[allow(dead_code)]` markers in expand/mod.rs:10 and query/table_function.rs:500 are pre-existing (unrelated to Plan 05 purge); 2,632 LOC confirmed deleted |
| 7 | `src/conn_guard.rs` does not exist (Plan 03 D-02 deletion) | ✓ VERIFIED | File absent; no module declaration in lib.rs |
| 8 | `src/ddl/define.rs::resolve_pk_from_catalog` does not exist (Plan 03 D-05 deletion) | ✓ VERIFIED | No `fn resolve_pk_from_catalog` definition found; only references are in comments explaining the deletion |
| 9 | `test/integration/test_readonly_load.py` has 4 D-03b post-reopen tests registered in `main()` | ✓ VERIFIED | Functions at lines 584, 628, 660, 695; registered in main() at lines 799-806 |
| 10 | 12/12 `test_readonly_load.py` tests PASS on `milestone/v0.10.0` | ✓ VERIFIED | Ran live: `SUMMARY: 12/12 tests passed` (3 subprocess + 5 Plan 01 watchdog + 4 D-03b) |
| 11 | `just test-all` and `just ci` both exit 0 | ✓ VERIFIED | Both executed live; `just ci` exit 0 confirmed (53 sqllogictests, cargo test, adbc, ducklake CI, clippy, fmt, cargo-deny, fuzz check, Sphinx docs) |
| 12 | `test_adbc_transactions.py` 6/6 PASS (D-21 transactional invariant preserved) | ✓ VERIFIED | Ran live: `Results: 6 passed, 0 failed` |
| 13 | Phase 64 `qualify_and_quote_table_ref` wiring at `src/expand/sql_gen.rs:499,530,550` untouched | ✓ VERIFIED | `grep` confirmed 3 call sites at lines 499, 530, 550 |

**Score:** 13/13 truths verified

---

### Required Artifacts

| Artifact | Expected | Status | Details |
|----------|----------|--------|---------|
| `tests/no_long_lived_conn.rs` | Structural guard: `init_extension_has_no_duckdb_connect_call` test | ✓ VERIFIED | 125 LOC; syn::visit::Visit AST walk; test PASSES (`cargo test --test no_long_lived_conn` → ok) |
| `test/integration/test_readonly_load.py` | 4 D-03b tests (`test_in_process_bootstrap_then_readonly_semantic_view_select`, `_describe`, `_show_dimensions`, `_get_ddl`) | ✓ VERIFIED | All 4 functions present at lines 584/628/660/695; registered in main() |
| `.planning/milestones/v0.9.0-phases/63-readonly-database-load-support/deferred-items.md` | LIFE-04 closure with "RESOLVED" + forward pointer | ✓ VERIFIED | Line 64: "Status: RESOLVED in v0.10.0 (2026-05-25) — Phase 65" with commit SHAs `964b0bf` (H1) and `26fea8d` (H2) |
| `src/parse.rs::OverrideContext` | Empty struct — no `CatalogReader` field, no Drop impl, no `INTENTIONAL LEAK` comment | ✓ VERIFIED | `pub struct OverrideContext {}` at parse.rs:53; zero fields; no Drop impl; zero `INTENTIONAL LEAK` matches |
| `cpp/src/shim.cpp` + `cpp/src/shim.hpp` | `sv_register_parser_hooks` signature is `(duckdb_database db_handle)` only | ✓ VERIFIED | shim.cpp:2465 `bool sv_register_parser_hooks(duckdb_database db_handle)` — no catalog_conn arg; shim.hpp:36 matching declaration |

---

### Key Link Verification

| From | To | Via | Status | Details |
|------|----|-----|--------|---------|
| `tests/no_long_lived_conn.rs` | `src/lib.rs::init_extension` | syn AST walk asserting no `duckdb_connect` call | ✓ WIRED | `visit_item_fn` scopes to `init_extension`; `visit_expr_call` checks last path segment; test PASSES on current tree |
| `test/integration/test_readonly_load.py` (4 D-03b tests) | `semantic_view` / `describe_semantic_view` / `SHOW SEMANTIC DIMENSIONS IN v` / `get_ddl('SEMANTIC_VIEW', 'v')` on RO reopened conn | `_connect_with_watchdog(... read_only=True)` + post-reopen call under 5s watchdog | ✓ WIRED | All 4 tests wrap reopen in `_connect_with_watchdog(watchdog_seconds=5.0)`; assert `elapsed < 5.0`; all 4 PASS |
| `src/lib.rs::init_extension` | `cpp/src/shim.cpp::sv_register_parser_hooks(db_handle)` | FFI extern block; single `db_handle` arg | ✓ WIRED | lib.rs:330 declares `fn sv_register_parser_hooks(db_handle: ffi::duckdb_database) -> bool`; lib.rs:450 calls it |
| `src/lib.rs::init_extension` | 17 read-side `sv_register_<name>` C++ functions | FFI extern block; each takes `db_handle` only | ✓ WIRED | 17 declarations at lib.rs:340-394; all called in init_extension body at lines 462-574 |

---

### Data-Flow Trace (Level 4)

| Artifact | Data Variable | Source | Produces Real Data | Status |
|----------|---------------|--------|--------------------|--------|
| `test/integration/test_readonly_load.py` D-03b tests | `rows` from post-reopen queries | Per-call `Connection(*context.db)` in C++ bind callbacks → `CatalogReader::new(conn, probe_catalog_table_present(conn))` → real DB queries | Yes — queries hit the `semantic_layer._definitions` table on the per-call connection | ✓ FLOWING |
| `cpp/src/shim.cpp` read-side bind callbacks | `Connection probe(*context.db)` | `context.db` is the caller's `DatabaseInstance`; callback opens per-call connection and closes after query | Yes — each bind opens real DB connection | ✓ FLOWING |

---

### Behavioral Spot-Checks

| Behavior | Command | Result | Status |
|----------|---------|--------|--------|
| Structural guard passes on post-H1-retirement tree | `cargo test --test no_long_lived_conn` | `test init_extension_has_no_duckdb_connect_call ... ok` (1 passed) | ✓ PASS |
| RO reopen returns within 5s + semantic_view SELECT works | `uv run test/integration/test_readonly_load.py` | `SUMMARY: 12/12 tests passed` | ✓ PASS |
| Transactional DDL preserved (D-21) | `uv run test/integration/test_adbc_transactions.py` | `Results: 6 passed, 0 failed` | ✓ PASS |
| Full CI gate | `just ci` | Exit 0 (53 sqllogictests, cargo test, clippy, fmt, cargo-deny, fuzz check, Sphinx) | ✓ PASS |

---

### Probe Execution

No conventional probe scripts for this phase. Integration tests serve as the acceptance probes (verified via behavioral spot-checks above).

---

### Requirements Coverage

| Requirement | Source Plan | Description | Status | Evidence |
|-------------|------------|-------------|--------|----------|
| LIFE-01 | 65-06 | In-process RW→RO reopen returns within 5s after LOAD + CREATE + close | ✓ SATISFIED | 12/12 watchdog tests PASS; REQUIREMENTS.md line 19 marks satisfied |
| LIFE-02 | 65-05 + 65-06 | Lifecycle mechanism: no extension-owned `duckdb_connection` held past single call | ✓ SATISFIED | H1 retired (Plan 06 commit `964b0bf`); H2 retired (Plan 05 commit `26fea8d`); per-call `Connection(*context.db)` pattern throughout shim.cpp |
| LIFE-03 | 65-01 + 65-06 | `test_readonly_load.py` includes in-process watchdog test scaffolding for the fix | ✓ SATISFIED | 5 Plan 01 watchdog tests (B1-B4 + B11) + 4 D-03b post-reopen tests; 9 in-process + 3 subprocess = 12/12 |
| LIFE-04 | 65-06 | Phase 63 `deferred-items.md` entry marked RESOLVED with forward pointer | ✓ SATISFIED | deferred-items.md line 64: "RESOLVED in v0.10.0 (2026-05-25)" + commit SHAs + forward pointer; committed `06246dc` |

---

### Anti-Patterns Found

| File | Line | Pattern | Severity | Impact |
|------|------|---------|----------|--------|
| `src/lib.rs` | 552-556 | Stale comment says "H1 catalog_conn at line ~441 above is still allocated + consumed by sv_register_parser_hooks only. Plan 06 retires H1..." — this is a Plan 05 comment written before Plan 06 landed; H1 IS already retired at this point in the code | INFO | Documentation inaccuracy only; actual code is correct; structural guard test independently verifies the implementation |

No TBD / FIXME / XXX markers found in phase files. No empty implementations. No placeholder returns. The stale comment is informational only and does not affect CI or correctness.

---

### Human Verification Required

None. All acceptance criteria are automated and verified by direct test execution.

---

## Gaps Summary

No gaps. All 13 must-haves are VERIFIED against the live codebase. Both long-lived extension-owned `duckdb_connection` handles (H1 catalog_conn, H2 query_conn) are confirmed retired from `init_extension`. The structural guard test passes. All integration tests pass. `just ci` exits 0.

### Notable Documentation Finding (INFO only)

A stale comment at `src/lib.rs:552-556` was written during Plan 05 (before Plan 06 landed) and says H1 catalog_conn "is still allocated + consumed by sv_register_parser_hooks only. Plan 06 retires H1". Since Plan 06 has landed, this comment is now inaccurate — Plan 06 already retired H1 and the comment reads as if it's still future work. This does not affect correctness (the code is correct; the structural guard test proves it) but the comment could confuse future readers. Recommended as a trivial doc-fix for Phase 66 or standalone commit.

---

### Commit Record (Phase 65 Plans 01-06)

| Commit | Description |
|--------|-------------|
| `964b0bf` | refactor(65-06): retire H1 catalog_conn + slim OverrideContext to empty struct |
| `20ae0dc` | test(65-06): add structural guard against duckdb_connect in init_extension |
| `ff5cbec` | test(65-06): add 4 D-03b post-reopen integration tests |
| `06246dc` | docs(65-06): close LIFE-04 ledger entry with forward pointer |

All four Plan 06 commits are present on `milestone/v0.10.0`.

---

_Verified: 2026-05-25T00:00:00Z_
_Verifier: Claude (gsd-verifier)_
_Branch: milestone/v0.10.0_
