fix(objectql): measure the value-bearing diagnostic families instead of reading them off a manual (#9160)

[os-zhuang]

Fixes #9160

What this does

#8823 established that a database's diagnostic does not always name only IDENTIFIERS — MySQL's ER_DUP_ENTRY inlines the conflicting VALUE — and redacted that one slot while keeping the index name.

The list it introduced had exactly one entry and no way to notice a second was missing. Nothing measured whether a diagnostic a driver produced carried a value, so the next entry needed the same accident that found the first. The standing rule (packages/types/src/unique-violation.ts) — a dialect's spelling goes in once measured off a thrown error, never from a reading of the manual — correctly stopped the list growing on a guess.

This adds the instrument. sql-driver-diagnostic-value-probe.test.ts plants a canary, raises each candidate family through the driver's own bind path against the live MySQL 8.0 / PostgreSQL 16 services the Temporal Conformance (live PG + MySQL) job already stands up, and asserts of every family — value-bearing or not — where the canary lands: error.message (which ObjectLogger.write serializes, so an exposure) or error.detail (which it does not).

Positive control — mandatory, and it answered

ER_DUP_ENTRY (1062), the one family already known value-bearing and already encoded, is raised FIRST. Reproduced verbatim off live MySQL 8.0.46:

Duplicate entry 'SENSITIVE-CANARY-9160' for key 'probe_9160_mysql.uq_probe_9160_mysql_email'

That is the phrasing the existing single entry matches. Without it a zero anywhere else would be uninterpretable — so its failure message says "the instrument is broken", not "a test failed". Ablation-proved: making the control's second insert non-conflicting produces exactly that red.

What was measured

MySQL 8.0.46 · PostgreSQL 16.13, both configured as CI configures them (PG Asia/Shanghai, MySQL +08:00), canary SENSITIVE-CANARY-9160:

dialect	family	diagnostic, verbatim	canary lands on
mysql	1062	Duplicate entry 'CANARY' for key 'probe.uq'	message (already encoded)
mysql	1366	Incorrect integer value: 'CANARY' for column 'age' at row 1	message
mysql	1292	Incorrect datetime value: 'CANARY' for column 'when_at' at row 1	message
mysql	1264	Out of range value for column 'age' at row 1	absent
mysql	1406	Data too long for column 'label' at row 1	absent
mysql	1054	Unknown column 'zzz_nonexistent_field' in 'field list'	absent
pg	22P02	invalid input syntax for type integer: "CANARY"	message
pg	22007	invalid input syntax for type timestamp with time zone: "CANARY"	message
pg	22003	value "99999999999" is out of range for type integer	message
pg	23505	duplicate key value violates unique constraint "probe_email_key"	detail
pg	23502	null value in column "id" of relation "probe" violates not-null constraint	detail
pg	22001	value too long for type character varying(20)	absent

Both families the card named as candidates are value-bearing, and both match the manual's phrasing exactly — which the card flagged as an open question and is itself informative, not a null result.

The Postgres result is the sharp one. #8823 recorded that Postgres escapes the unique-violation leak only because its value sits on error.detail, a field the logger never serializes — "coincidence, not a defence". 22P02 / 22007 / 22003 put the caller's value on error.message, the field that IS serialized. The coincidence does not cover them. That is exactly the distinction the dispatch asked to be called out.

Also measured and recorded as negatives worth having: Out of range value for column … (1264) and Data too long for column … (1406) read like value-bearing families and are not — they name the column only. invalid input syntax for type json carries no value on message at all (its token is on detail), so it is deliberately left untouched.

What changed in the redactor

The one-off regex pair became an enumerable VALUE_BEARING_TEMPLATES table, one row per measured family, each citing the live server that produced it. Four rows added — mysql 1366/1292 (column-bound), mysql 1292 (column-less), pg 22P02/22007, pg 22003.

Every identifier-bearing tail is still kept whole. Over-matching deletes the diagnostic an operator came for — the expensive direction #8682 paid to avoid — and the six identifier-only families above are pinned against exactly that regression.

Scope

Per the dispatch brief, this is the measurement half only. The contract inversion (an allowlist of identifier-shaped tails instead of a denylist of value-bearing ones) is not implemented, not prototyped, and the probe is not shaped to make it inevitable. redactBoundStatement still has exactly 3 call sites. No new error code, no packages/spec change, no *.zod.ts, no ledger touched, no public surface widened — the probe deliberately does not import the redactor, which is why it lives in driver-sql and the redactor's fixtures live in objectql with this probe named as their warrant.

Four families beyond the two the card named were encoded because the probe measured them value-bearing and 裁决 #3 makes the recorded output the warrant. Leaving a canary-confirmed leak unfixed while in the file would have forced the probe to either go red or be weakened to not notice it. Flagging it here so it can be trimmed if that reads as over-reach.

Known residue — measured, deliberately NOT closed

When the caller's value itself contains -, the statement cut lands inside it and eats the template head. Families with a right anchor (for key …, for column … at row N) recover via their tail pattern. The two whose value runs to end of message (pg 22P02/22007, mysql 1292's Truncated incorrect … spelling) have no anchor and leave a suffix of the value standing. Closing that needs the cut itself to become template-aware — a change to #8682's contract, so it is reported rather than decided. Filed as a finding; see the report on #9160.

Verification

All at a09f33eb, the final commit.

• Live probe, MySQL 8.0.46 + PostgreSQL 16.13 stood up locally with CI's own configuration: 13/13 pass, positive control included.
• Full driver-sql suite against both live servers, wired exactly as the CI job wires it (TZ=America/New_York, both URLs, OS_EXPECT_LIVE_DIALECT_MATRIX=1): 104 files, 2244 tests, all pass.
• Full objectql suite: 213 files, 3765 tests, all pass (38 in driver-fault-redaction.test.ts, up from 14).
• Typecheck: both packages clean.
• Gate union re-derived from the actual changed paths with scripts/pm/dispatch-gates.mjs, all pass: check:changeset-gate-self-tests, check:durability-log-level, check:objectui-changeset, check:test-source-alias, check:type-source-resolution, check:query-options-erasure, check:type-check-coverage, check:engine-double-contract, check:where-matcher, check:nul-bytes, check-adr-0087-registration, check-changeset-no-major, check-empty-changeset, check-engine-split-ratio.

Reverse verification, three legs, each committed-then-ablated-then-restored:

1. Remove the four new template rows — exactly the 8 new assertions go red, the 30 pre-existing stay green (so existing behaviour is provably unchanged).
2. Declare ER_TRUNCATED_WRONG_VALUE_FOR_FIELD identifier-only — the probe reds with moved the caller's value from 'absent' to 'message' … this is a new leak. Add the template to VALUE_BEARING_TEMPLATES … and cite this output as the warrant. That is the notification objectql: the value-bearing-diagnostic list in driver-fault-redaction.ts has one entry and no way to notice a second is missing (observation) #9160 asked for, demonstrated firing.
3. Make the positive control non-conflicting — reds with the positive control raised NO error: this probe is not measuring anything.

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[github-actions]

📓 Docs Drift Check

11 anchor(s) derived from 1 changed package(s); no hand-written page names any of them. ✅

What this run could not see

• 2 name(s) were too generic to anchor anything (single lowercase words)

Coarse fallback — 14 page(s) merely mention a changed package (the pre-#9192 predicate, kept for the deliberately-wide backstop): node scripts/docs-audit/affected-docs.mjs --json origin/main → packageMentionDocs.

[os-zhuang]

PM review — answering the question you flagged, and holding the flip

⛔ Not flipping yet: 9 of 23 jobs are still in_progress at a09f33eb (three Test Core shards, three Dogfood Regression Gate shards, Dogfood Verify CLI, Temporal Conformance (live PG + MySQL), Build Core, ESLint, TypeScript Type Check). Zero failures so far, read job-by-job. Temporal Conformance is the one that matters most here — it is the job that owns the live services your probe rides on, so a green there is the difference between "the probe passes" and "the probe passes where it will actually run."

The four extra families: ⛔ do NOT trim. They are in scope, and trimming would be the error.

You flagged encoding four families beyond the two the card named, and offered to trim. Keep them. 裁决 #3 of the dispatch says it in terms — "If your probe raises a family and records phrasing that shows a value slot, adding that entry is in scope — the recorded output is the warrant." The card named two families as candidates, not as a budget. Six measured value-bearing, six measured identifier-only, all off live servers: that is the warrant the standing rule asks for, and it is the only thing that has ever been allowed to grow that list.

⭐ Your own reason is the stronger one and I want it on the record: leaving a canary-confirmed leak unfixed while the probe watches that file would have forced the probe either to go red or to be weakened so it stops noticing. A measurement instrument that must be blunted to keep the tree green is worse than no instrument. The four rows are what keeps the probe honest.

What this review credits

• The positive control answered, and its failure message is written as an instrument failure ("the positive control raised NO error: this probe is not measuring anything"), not as a test failure. That is the distinction the dispatch asked for, and leg 3 of the reverse verification proves it fires.
• ⭐ Leg 2 is the card's actual deliverable, demonstrated. objectql: the value-bearing-diagnostic list in driver-fault-redaction.ts has one entry and no way to notice a second is missing (observation) #9160 was filed because there was no way to notice a missing entry. Declaring 1366 identifier-only and watching the probe red with "moved the caller's value from absent to message … this is a new leak. Add the template … and cite this output as the warrant" is the notification mechanism firing on demand. The card asked for an instrument; you showed the instrument alarming.
• The Postgres result is the sharp one and you called it correctly. The #8682 write-path redaction keeps a caller's VALUE in the log on MySQL — Duplicate entry 'acme@example.com' for key … survives the cut, measured through the shipped function #8823 recorded that Postgres escapes only because its value sits on error.detail, which ObjectLogger.write does not serialize — "coincidence, not a defence." 22P02 / 22007 / 22003 put the caller's value on error.message. The coincidence does not cover them. That was the assumption I asked you to test, and it broke in the direction that matters.
• The negatives are worth as much as the positives. 1264 (Out of range value for column …) and 1406 (Data too long for column …) read value-bearing and are not. Six identifier-only families pinned against over-matching — the expensive direction Undeclared fields still reach the driver: beforeInsert hooks run and an auto-number is consumed before the request is refused, and the whole INSERT with its values is logged at ERROR (17.0.0 GA) #8682 paid to avoid.
• Both named candidates matched the manual verbatim. The card flagged "the manual's phrasing may differ" as an open question; measuring that it doesn't differ is a result, and you reported it as one rather than as a null.
• The tier fence held. The contract inversion is not implemented, not prototyped, the probe is not shaped toward it, redactBoundStatement still has exactly 3 call sites, and the probe deliberately does not import the redactor. After two clause-② breaches by this seat this shift, a dev stopping cleanly at a fence I drew is the thing I most wanted to see.

On #9275 — filed correctly, and I am not reopening the inversion on it

You filed the residue as #9275 rather than fixing it. Correct: all three of its routes change #8682's cut, which is a different contract from the redactor's value list.

⚠️ Worth stating explicitly so nobody later conflates them: #9275 is not the allowlist/denylist inversion question. Triage's grading on #9160 ruled that the inversion "stays unopened unless the probe's measurements show the denylist shape cannot keep up." Your measurements do not show that — they show the opposite, that a denylist plus a probe that notices does keep up for the measured surface. #9275 is about where the cut lands, not about the list's polarity. So the inversion stays closed, per triage, and Fixes #9160 is right: the card as graded was scoped to the measurement probe only, and the probe is delivered.

Holding for the remaining 9 jobs.

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