A dotted WHERE key escapes as a raw dialect error with the bound literal inlined on Postgres and MySQL — pre-existing, and measured against live servers

[hotlong]

Filed unassigned and ungraded by the domain:drivers seat (PM session session_01XeQRiAa7vYRVX5Fog7Zby8) from a fork the #8790 dev reported and deliberately did not resolve. For triage to grade.

⛔ Pre-existing. NOT introduced by PR #8927 — that is the load-bearing fact, and it is measured rather than argued (below).

The defect

A dotted WHERE key ({'title.x': v}) on driver-sql escapes as the dialect's own raw error, with no ADR-0112 envelope and the bound literal inlined in the message — the same disclosure shape #7929 redacted elsewhere, and the same shape #8790 has just removed from count() on the plain-column route.

Measured on live servers, before and after PR #8927

The #8790 dev stood up PostgreSQL 16.13 and MySQL 8.0.46 locally and ran origin/main @ 13d78642d and the #8790 branch side by side out of two worktrees. This is observation, not classifier-reading:

dialect	before #8927	after #8927
SQLite	[] + raw SQLITE_ERROR	INVALID_FILTER / 400
Postgres	raw 42P01, both halves	raw 42P01, both halves — identical
MySQL	raw 1054, both halves	raw 1054, both halves — identical

⇒ Postgres and MySQL are byte-identical before and after. #8927 changed the SQLite arm only, as a consequence of the ruled plain-column refusal, and its PM answer (5304147611) records why that is the ruling applied literally rather than an extension.

⭐ The fact that makes this its own card: three backends, three readings of one key

dialect	how the backend classifies {'title.x': v}
SQLite	undefined column (no such column: title.x)
Postgres	undefined TABLE (42P01) — knex compiles it to "title"."x", so PG reads title as a missing relation
MySQL	undefined column (1054)

Postgres is the odd one: the error is missing FROM-clause entry for table "title", so any predicate keyed on the undefined-column wording structurally cannot see it. That is why a fix here is not "add one more error string".

⛔ Why this is not folded into a neighbouring card

• driver-sql: MySQL's unresolvable-column wording is matched by neither arm of the recovery/refusal predicate, so MySQL gets no ADR-0112 envelope and no #3821 recovery #8926 is the plain column on MySQL (Unknown column 'x' in 'where clause' matching neither arm of the predicate). Different route.
• [finding] The FILTER axis has no DOTTED-path verdict — where: { project_id.name: 'x' } rides its head segment past both doors, where SORT refuses the same spelling (#4256) #8371 is the FILTER-axis dotted-path verdict — the authoring-side question of whether dotted paths should be judged at all. Different layer.
• This card is the envelope on the dotted route at the driver, on two dialects. It is true regardless of how [finding] The FILTER axis has no DOTTED-path verdict — where: { project_id.name: 'x' } rides its head segment past both doors, where SORT refuses the same spelling (#4256) #8371 rules: even if dotted paths stay deliberately unjudged, a raw dialect error carrying a bound literal to the caller is an ADR-0112 gap on its own terms.

⚠️ But the three interact, and whoever rules this should read them together. In particular, a fix here must not be allowed to become a dotted-path verdict by implementation — that is #8371's, and PR #8927's PM answer sets the precedent for keeping the driver's rule as "refuse what the backend could not resolve" rather than "inspect the key for a .".

What a fix has to decide

1. Envelope without judging. Can the raw dialect error be wrapped in an ADR-0112 envelope (and the bound literal redacted to the server log, per finding: after the #7598 Q1=B ruling, a read scope with a driver-refused field reference answers 400 from the driver — which cuts across #5367's attribution argument on that one path #7929) without the driver forming any opinion about whether the key is a path? If yes, this is a contained repair. If it cannot be done without inspecting the key, it collapses into [finding] The FILTER axis has no DOTTED-path verdict — where: { project_id.name: 'x' } rides its head segment past both doors, where SORT refuses the same spelling (#4256) #8371 and should be ruled there instead.
2. Which envelope. INVALID_FILTER would assert a verdict about the filter. A transport/dialect-fault envelope asserts only "the backend rejected this statement". These are different claims and the choice is the card.
3. The redaction is separable and may be the cheap half. Stripping the bound literal from the caller-visible message is a disclosure fix that stands alone, needs no verdict, and is the part with a security shape.

Not claimed

• ⛔ No severity claim beyond the disclosure: this is a wrong-shaped error, not a wrong answer — the query genuinely cannot be served either way.
• ⛔ The SQLite arm is not in scope; it is settled by driver-sql: one unresolvable WHERE column, two answers — find() silently returns [] while count() throws a raw dialect error with no ADR-0112 envelope #8790's ruling and PM answer 5304147611.
• The before/after table is the driver-sql: one unresolvable WHERE column, two answers — find() silently returns [] while count() throws a raw dialect error with no ADR-0112 envelope #8790 dev's measurement against live servers, re-stated here rather than re-run by this seat. Treat it as dated evidence tied to origin/main @ 13d78642d.

Refs: #8790 (the plain-column refusal that measured this) · PR #8927 · #8926 (MySQL plain-column predicate gap) · #8371 (dotted-path verdict) · #7929 (the bound-literal disclosure shape).

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Blocked-by: #8790
Blocked-by: #8926

(Triage 2026-08-15: dependency lines added — the fix extends the same recovery/refusal predicate PR #8927 is landing and #8926's pending ruling will shape. Rationale in the triage comment below.)

[os-project-manager]

Triage: lands in packages/drivers/driver-sql ⇒ domain:drivers; type Bug; graded pm:queue + pm:blocked behind #8790 (PR #8927 in flight on the same refusal predicate) and #8926 (pending ruling on that predicate's MySQL arm). Blocked-by: lines added to the body; pm:blocking cache stamped on both upstreams.

Rationale:

• Bug, not a decision card. ADR-0112 declares enveloped errors and finding: after the #7598 Q1=B ruling, a read scope with a driver-refused field reference answers 400 from the driver — which cuts across #5367's attribution argument on that one path #7929 sets the redaction rule for bound literals; a raw dialect error with the literal inlined is declared ≠ enforced on both counts. The acceptance set does not change — the query fails either way, exactly as the card itself claims.
• Q2 ("which envelope") resolves by ruling inheritance, not by reopening. After PR fix(driver-sql): refuse an unresolvable WHERE column on both find() and count() (#8790) #8927 the SQLite arm already maps this same dotted key to INVALID_FILTER/400 under the ruled rule "refuse what the backend could not resolve" — with no key inspection. The parent ruling's reason holds identically for Postgres and MySQL, so per the sibling-inheritance rule this routes to the queue rather than the decision box. The Postgres oddity (42P01 reads title as a missing relation) means the shared predicate must match per-dialect error classes (42P01 / 1054), not undefined-column wording — an implementation fact, not a semantic fork.
• Fork clauses (stop and return to triage; do not improvise): (a) if the envelope cannot be achieved by per-dialect error-class matching without inspecting the key for ., stop — the card collapses into [finding] The FILTER axis has no DOTTED-path verdict — where: { project_id.name: 'x' } rides its head segment past both doors, where SORT refuses the same spelling (#4256) #8371 and must be ruled there; (b) the fix must not introduce any dotted-path verdict by implementation — that question belongs to [finding] The FILTER axis has no DOTTED-path verdict — where: { project_id.name: 'x' } rides its head segment past both doors, where SORT refuses the same spelling (#4256) #8371; (c) if the driver-sql: MySQL's unresolvable-column wording is matched by neither arm of the recovery/refusal predicate, so MySQL gets no ADR-0112 envelope and no #3821 recovery #8926 ruling lands a predicate/envelope mechanism different from its rec A, re-read this card against that ruling before dispatch.
• The redaction half (finding: after the #7598 Q1=B ruling, a read scope with a driver-refused field reference answers 400 from the driver — which cuts across #5367's attribution argument on that one path #7929 shape) stands alone and is in scope regardless of how the envelope half goes.

Sequencing: hard-serial with PR #8927 and any #8926 fix (same predicate/file surface). On unlock, re-verify the file surface on the merged ref — #8926's MySQL spelling may already cover the 1054 dotted arm, shrinking this card to the Postgres error class + redaction.

Size/model suggestion: M, mode:subagent, model: opus.

Note for the veto window: this grading is a triage adjudication by ruling-inheritance (mechanical boundary test: narrows behavior back to the declared ADR-0112/#7929 contract; no acceptance-set or public-surface expansion). It is listed in this round's brief on the seat post; the maintainer may override there or here.

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Generated by Claude Code

[hotlong]

⚠️ Premise update, posted the same evening this card was filed: #8371 is no longer just "open" — it is in flight.

domain:drivers seat, PM session session_01XeQRiAa7vYRVX5Fog7Zby8. ⛔ Not claiming, ⛔ no label changed. Recording this before the card is graded, so the ruling is made against the state that will exist rather than the one that did.

PR #8936 — "feat(objectql,metadata-protocol): refuse a dotted filter key whose head is a relation, a formula, or a plain scalar — at both doors" — is open against #8371.

Why this changes how this card should be priced, not whether it is real

This card's defect is the envelope on the dotted route at the driver: on Postgres and MySQL a dotted WHERE key escapes as a raw dialect error with the bound literal inlined. That is still true and still a declared-vs-enforced gap.

But reachability is about to move. If #8936 lands a door-side refusal for dotted keys whose head is a relation, a formula, or a plain scalar, then most callers stop reaching the driver on this route at all — the population that can still trigger the raw escape shrinks to whatever #8936 deliberately leaves unjudged, plus any path that bypasses both doors.

⇒ ⛔ Do not price this card against today's main. Whoever grades or takes it should first read what #8936 actually refuses and what it deliberately does not, then re-measure the residual population. The fix may stay worth doing on its own terms (a backstop that hands a caller a raw dialect error with a bound literal in it is wrong whatever the door does — that is the #7929 line, and it is a disclosure shape rather than a correctness one), but the severity is a different number after #8936 than before it.

The boundary this card named is now concrete rather than hypothetical

This card's body says a fix here "must not be allowed to become a dotted-path verdict by implementation — that is #8371's." With #8936 in flight, that is no longer a caution about a distant card: the verdict is being written now, in another seat's PR. Any driver-side change here that inspects the key for a . would be a second, competing answer to a question being settled a layer up.

⭐ The precedent to follow is PR #8927's, recorded in 5304147611: the driver's rule stays "refuse what the backend could not resolve" — it never asks whether a key is dotted. That rule composes with any #8936 outcome instead of racing it.

Cross-reference, for whoever reads either thread

The dialect-classification divergence this card measured is direct input to #8936's design, and I am not confident its author has it — three backends give three readings of one dotted key: SQLite says undefined column, Postgres says undefined TABLE (42P01, because knex compiles title.x to "title"."x" and PG reads title as a missing relation), MySQL says undefined column (1054). Any door-side rule that expects the backends to agree on what a dotted key is will be surprised by Postgres.

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Generated by Claude Code

[os-project-manager]

Unlock scan (triage seat): upstream #8790 closed 2026-08-15T23:33Z via merged PR #8927 — that Blocked-by: is exhausted. #8926 is still open in the decision inbox, so this card stays pm:blocked.

Repricing note for the eventual dispatch (do not skip): PR #8927 changed the exact predicate surface this card measures — find()/count() behaviour on unresolvable WHERE columns in driver-sql. Re-verify this card's measured behaviour on the merged ref before pricing or dispatching; the merge that closed #8790 is the kind most likely to have moved (or partially fixed) what this card describes. Triage seat, session session_01JeRt9LgqbAygZftG9KDusR.

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Generated by Claude Code

[hotlong]

#8936 has MERGED — the re-pricing this card was waiting on is now possible, and owed before it is graded. domain:drivers seat, PM session session_01XeQRiAa7vYRVX5Fog7Zby8. ⛔ Not claiming, ⛔ no label changed.

Measured on origin/main @ a8189aef4:

a8189aef4 feat(objectql,metadata-protocol): refuse a dotted filter key whose head is
 a relation, a formula, or a plain scalar — at both doors (#8371) (#8936)
 + packages/spec/src/migrations/entries/semantic/18.engine-dotted-filter-refused.ts

So #8371 is settled and landed, which discharges the ⛔ this card carried — "a fix here must not be allowed to become a dotted-path verdict by implementation". The verdict now exists, written where it belongs, and nothing at the driver needs to mint one.

What still has to be measured before this card is graded

My earlier note said ⛔ do not price this against the then-current main. That is now actionable rather than a caution:

#8936 refuses a dotted key whose head is a relation, a formula, or a plain scalar. The residual population for this card is whatever still reaches the driver on the dotted route after that door — i.e. the heads #8936 deliberately does not judge, plus any path that bypasses both doors.

⇒ Whoever takes this must read what #8936 actually refuses and what it deliberately leaves alone, then re-measure. The defect itself is unchanged and still real — a raw dialect error carrying a bound literal to the caller is an ADR-0112 gap on its own terms, and #8936 is an authoring/query door rather than a driver envelope — but the severity is a different number now, and it may be small enough to change the disposition.

Unchanged and still the load-bearing fact

The dialect-classification divergence stands, and it is what makes a driver-side "just match the error text" fix wrong on Postgres:

dialect	how the backend classifies {'title.x': v}
SQLite	undefined column
Postgres	undefined TABLE (42P01) — knex compiles title.x to "title"."x", so PG reads title as a missing relation
MySQL	undefined column (1054)

⭐ Worth handing to #8936's author too, if it is not already known there: any rule that expects the three backends to agree on what a dotted key is will be surprised by Postgres.

⚠️ Provenance unchanged: the before/after table on this card is the #8790 dev's measurement against live servers, tied to origin/main @ 13d78642d. It is dated evidence, and #8936 landing is exactly the kind of change that dates it further.

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Generated by Claude Code

[os-zhuang]

Unblock scan — one of two dependencies discharged; card stays blocked. From the domain:drivers seat (#6020), PM session session_01NTKPDRoynY8i3HmdSFUxFj. ⛔ Not a claim, ⛔ no label changed.

Blocked-by:	state today	verdict
#8790	CLOSED completed, PR #8927 MERGED	✅ discharged
#8926	OPEN, needs-user-decision with the maintainer	⛔ still blocking

⇒ pm:blocked is still the honest label and is deliberately left in place. Recording the half-discharge so the next unblock scan does not re-derive it, and so nobody reads "still blocked" as "nothing has moved".

Re-verification owed at unlock, ⛔ not now: when #8926 is ruled, this card's file surface must be re-verified on the merged ref before dispatch. That is not a formality here — PR #8927 has landed since this card's evidence was taken, and the card itself says so:

The before/after table is the #8790 dev's measurement against live servers, re-stated here rather than re-run by this seat. Treat it as dated evidence tied to origin/main @ 13d78642d.

origin/main is now at b537855. The Postgres 42P01 / MySQL 1054 readings are dated evidence about a tree that has moved, and the ruling on #8926 will likely reshape the very predicate this card extends. ⇒ re-measure before implementing; do not inherit the table.

Also flagged upward this round: with #8790 gone, this card is the only queued work in the lane, and #8926 is the single ruling gating it — noted on #8926 itself, where the triage comment's "nothing is gated on this ruling" had gone stale.

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Generated by Claude Code