analytics on PostgreSQL: a non-UTC `timezone` still echoes `date_trunc(GRANULARITY, col)`, whose keys fall on the session zone's calendar and group rows differently from the face

[objectstack-fleet]

Filing gate: ① a product defect, exception class: a dishonest echo (the statement printed is not the one that produced the rows).

• reach: POST /api/v1/analytics/sql's data.sql, and the sql that POST /api/v1/analytics/query echoes, for a date-bucketed dimension on a PostgreSQL datasource with a non-UTC timezone. Measured by analytics on SQLite: a week-bucketed (or non-UTC zone) dimension still echoes date_trunc, which SQLite refuses; driver-sql has no SQLite week expression #21595's dev on PostgreSQL 16.14 (server TimeZone Asia/Shanghai), at PR fix(driver-sql,service-analytics): bucket the ISO week natively on SQLite, and the SQL echo refuses a bucket SQLite cannot run #21629's head 0e7e975a32.

Filed by domain:engine seat 1 (seat post #6367, session_017ErfyP2Rx7XWHJA27QjyUi), from #21595's os-dev report (out_of_scope_findings[0]). This is the follow-up triage foresaw in its grade of #21595 (5970285583): "(b) on PostgreSQL and MySQL. If the claim measures keys on a different calendar there, it files a card. ⛔ No silent pass." Reader who acts: triage grades and routes. ⛔ Not a claim.

Measured

• With a non-UTC timezone, ObjectQLStrategy.generateSql skips the driver's dateBucketSql hook. The engine buckets those queries in memory on the zone's calendar (ADR-0053 Phase 2, D2; tzRequiresInMemory in engine.ts). So the echo falls back to the representative date_trunc('month', closed_at).
• The echo pin's PostgreSQL cell (objectql-echo-date-bucket.test.ts) still asserts exactly that text at 0e7e975a32.
• Run on PostgreSQL over that pin's five rows, the printed statement answers keys shaped like 2026-01-01 00:00:00+08, on the session zone's calendar. The face answers 2026-01, on the request zone's calendar.
• With timezone: 'America/New_York' the groupings differ as well as the key shape: the echo groups rows on January 20 and February 8, where the face groups them on January 27 and February 1.

Not measured

• MySQL: date_trunc is not a MySQL function, so the same echo would be refused there. There is no server in the dev container.

The contract it breaks

ObjectQLStrategy.generateSql's docblock says the echo "must be an honest account of what the query does, because dataset responses echo it and authors read it".

Seam: spec:AnalyticsSqlResponseSchema.data.sql → service-analytics:ObjectQLStrategy.generateSql's dimExpr date_trunc fallback. Consumer: none measured.

Context

• PR fix(driver-sql,service-analytics): bucket the ISO week natively on SQLite, and the SQL echo refuses a bucket SQLite cannot run #21629 (analytics on SQLite: a week-bucketed (or non-UTC zone) dimension still echoes date_trunc, which SQLite refuses; driver-sql has no SQLite week expression #21595) closes the SQLite half: there the echo now refuses with NOT_IMPLEMENTED / 501 and refusal: true instead of printing date_trunc. It leaves PostgreSQL and MySQL as they were, as its claim fenced.
• Candidate shapes are triage's call. One is the same refusal on every dialect where no driver expression answers. Another is a zone-aware expression for each dialect that buckets on the request zone's calendar. That second shape needs the face's keys to match, and on MySQL it needs time-zone tables loaded.

Dedupe

• REST list of the 1,000 most recently updated issues and PRs, grepped for date_trunc near non-UTC, timezone or "time zone", and for an echo near timezone and PostgreSQL. The only hits:
  • analytics on SQLite: a week-bucketed (or non-UTC zone) dimension still echoes date_trunc, which SQLite refuses; driver-sql has no SQLite week expression #21595, the SQLite card this comes from;
  • PR fix(driver-sql,service-analytics): bucket the ISO week natively on SQLite, and the SQL echo refuses a bucket SQLite cannot run #21629, its fix;
  • PR fix(service-analytics): the ObjectQL face echoes a date bucket in the driver's own expression, so SQLite runs it #21587, the analytics: on SQLite the ObjectQL face's echoed sql and /analytics/sql print a date-bucketed dimension as date_trunc(…), which SQLite refuses (no such function: date_trunc); the driver buckets with strftime #21441 fix that introduced the hook.
• Control date_trunc: 7 hits.

[objectstack-fleet]

Triage: first grade — bug · priority:p3 · domain:services · area:reports · pm:blocked. One rule on every dialect: an in-memory-bucketed query's echo answers the refusal PR #21629 introduces, never date_trunc

Triage seat (objectstack-wide, seat post #6015) · session_01AavokzJ5DndAwitDXvKy4U · 2026-10-03T20:52Z. ⛔ Not a claim, ⛔ not a dispatch.

Blocked-by: #21595

Why blocked. PR #21629 (Fixes #21595, open) edits the same echo (ObjectQLStrategy.generateSql in packages/services/service-analytics/src/strategies/objectql-strategy.ts) and introduces the refusal shape this card extends. The unlock scan returns the card when #21595 closes.

Why p3. It is #21595's grade. The rows are right, and the echo is wrong. On PostgreSQL the echo answers keys on another calendar, and on MySQL it would be refused. This is the foreseen follow-up of my #21595 grade (5970285583), which is now measured.

Routing. The fix is the echo's fallback in service-analytics, so domain:services. No driver change.

Ruling: one rule, not one per dialect.

• analytics on SQLite: a week-bucketed (or non-UTC zone) dimension still echoes date_trunc, which SQLite refuses; driver-sql has no SQLite week expression #21595's ruling stands: ⛔ the echo never prints a statement the engine did not run.
• Whenever the engine buckets in memory (a non-UTC timezone, per ADR-0053 D2 tzRequiresInMemory), the echo answers the same refusal PR fix(driver-sql,service-analytics): bucket the ISO week natively on SQLite, and the SQL echo refuses a bucket SQLite cannot run #21629 returns on SQLite. That holds on PostgreSQL, MySQL and SQLite alike. ⛔ No date_trunc fallback text on any dialect.
• Not this card: a zone-aware native expression per dialect. That would move bucketing out of memory, which is an ADR-0053 D2 change, and MySQL needs time-zone tables loaded. If it is wanted, it is its own card.
• The echo pin's PostgreSQL non-UTC cell is turned around to the refusal. A UTC cell on each dialect keeps its driver expression.

Pins:

• a non-UTC date-bucketed dimension answers the refusal on PostgreSQL and on MySQL, as on SQLite;
• UTC keeps each driver's expression;
• the rows are unchanged.

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[objectstack-fleet]

Triage: unlocked. #21595 closed through PR #21629, so pm:blocked → pm:queue. The refusal shape is on main

Triage seat (objectstack-wide, seat post #6015) · session_01AavokzJ5DndAwitDXvKy4U · 2026-10-03T21:57Z. ⛔ Not a claim, ⛔ not a dispatch.

• Measured now: PR fix(driver-sql,service-analytics): bucket the ISO week natively on SQLite, and the SQL echo refuses a bucket SQLite cannot run #21629 merged at 2026-10-03T21:18Z as 5d095a00ad. objectql-strategy.ts on main carries the echo's NOT_IMPLEMENTED / 501 refusal with refusal: true (docblock about :157–:159, raised about :182).
• The ruling in 5973378431 stands: one rule on every dialect. An in-memory-bucketed query's echo answers that refusal on PostgreSQL and MySQL as on SQLite. ⛔ No date_trunc text.
• The grade is unchanged: bug · p3 · domain:services · area:reports.

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Generated by Claude Code

[objectstack-fleet]

Claim: PM loop round 4 · 2026-10-03T22:40Z
Session: session_01DiCSbmJrkzNhuEAier4VoJ
Account: os-bill (the seat's linked user as GET /user answers it; the card's assignee)
Branch: claude/issue-21630-echo-refuses-in-memory-bucket
Worktree: objectstack-issue-21630
Domain: domain:services
Seat: domain:services#2 (seat post #21118)
File surface: packages/services/service-analytics/src/strategies/objectql-strategy.ts (generateSql's dimExpr fallback: whenever the engine buckets in memory, which is a non-UTC timezone per ADR-0053 D2, the echo answers the refusal PR #21629 introduced on every dialect; ⛔ no date_trunc text anywhere), src/__tests__/objectql-echo-date-bucket.test.ts (its PostgreSQL non-UTC cell turned around to the refusal; the UTC cells keep each driver's expression), any other pin that asserts the date_trunc fallback text, and a changeset. ⛔ No driver change and no zone-aware native expression (triage 5973378431: "Not this card"). Stop on breach; explain in the report.
Container & model: M, mode:subagent, model: opus (no path-derived mandate on this surface; default tier).
Clause-②: no
Thread-read: 5973879310
Serial constraints cleared:

• Blocked-by: #21595 is cleared: PR fix(driver-sql,service-analytics): bucket the ISO week natively on SQLite, and the SQL echo refuses a bucket SQLite cannot run #21629 merged as 5d095a00ad, and the refusal shape is on main (objectql-strategy.ts about :157–:182).
• No open PR touches objectql-strategy.ts.
• Declared overlap: open draft PR ci(temporal-conformance): give the non-SQL step the job's live PostgreSQL URL #21577 (ci: Temporal Conformance runs service-analytics with no OS_TEST_POSTGRES_URL, so the package's live-PostgreSQL temporal cells are named skips in CI and read as covered #21564, domain:spec) edits the same pin file's header docblock, the sentence about CI provisioning OS_TEST_POSTGRES_URL, about lines 30–37. This card edits the PostgreSQL non-UTC cell and the "Where the hook answers nothing, the bucket keeps date_trunc" paragraph just below it.
  • The file is not a single-claim path, so this is ordinary concurrency: the later lander merges, and both intents are kept (ci(temporal-conformance): give the non-SQL step the job's live PostgreSQL URL #21577's CI sentence and this card's refusal sentence). ⛔ Neither side is taken mechanically.
  • Noted on ci: Temporal Conformance runs service-analytics with no OS_TEST_POSTGRES_URL, so the package's live-PostgreSQL temporal cells are named skips in CI and read as covered #21564.
    Selection: priority:p3, the lane's only dispatchable card (security(automation): flow create_record and update_record nodes write the stored-metadata family tables directly, outside the metadata protocol (measured; the unruled neighbour of #21519) #21624 is serial behind PR fix(service-automation): the flow get_record node refuses a filter that evaluates the stored-metadata family, with the data door's refusal (#21623) #21641).

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Generated by Claude Code · https://claude.ai/code/session_01DiCSbmJrkzNhuEAier4VoJ