perf(webapp,database): index the newest-task-version lookup - #4518
perf(webapp,database): index the newest-task-version lookup#4518ericallam wants to merge 1 commit into
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Schedule validation seeks (projectId, slug) and then sorts every matching row by createdAt to return one. A project gains a row per task per deploy, so the sort grows with project age. Index the sort key so Postgres scans backward and stops at the first row, and select only the field the check reads.
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WalkthroughThe change adds a composite index on 🚥 Pre-merge checks | ✅ 5✅ Passed checks (5 passed)
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📒 Files selected for processing (4)
.server-changes/faster-schedule-validation-lookup.mdapps/webapp/app/v3/services/checkSchedule.server.tsinternal-packages/database/prisma/migrations/20260806100000_add_background_worker_task_project_id_slug_created_at_index/migration.sqlinternal-packages/database/prisma/schema.prisma
📜 Review details
🧰 Additional context used
📓 Path-based instructions (11)
internal-packages/database/prisma/migrations/**/migration.sql
📄 CodeRabbit inference engine (internal-packages/database/CLAUDE.md)
internal-packages/database/prisma/migrations/**/migration.sql: When adding indexes to existing tables, useCREATE INDEX CONCURRENTLY IF NOT EXISTSto avoid production table locks.
Keep eachCONCURRENTLYindex in its own separate migration file, and add only one index per migration file.
Indexes on newly created tables may be created withoutCONCURRENTLYin the same migration asCREATE TABLE.
When adding an index for a new column on an existing table, use two migrations: firstALTER TABLE ... ADD COLUMN IF NOT EXISTS ..., then a separate migration containingCREATE INDEX CONCURRENTLY IF NOT EXISTS ....
Files:
internal-packages/database/prisma/migrations/20260806100000_add_background_worker_task_project_id_slug_created_at_index/migration.sql
**/*.{ts,tsx}
📄 CodeRabbit inference engine (.github/copilot-instructions.md)
**/*.{ts,tsx}: Use types over interfaces for TypeScript
Avoid using enums; prefer string unions or const objects instead
**/*.{ts,tsx}: Prefer static imports over dynamicimport(); use dynamic imports only for unresolvable circular dependencies, genuine performance code splitting, or conditional runtime loading.
Import Trigger.dev tasks from@trigger.dev/sdk; never use@trigger.dev/sdk/v3or deprecatedclient.defineJob.
Add agentcrumbs while writing code using approved namespaces; mark lines with//@Crumbsor blocks with `// `#region` `@crumbs, and strip them before merging.
Files:
apps/webapp/app/v3/services/checkSchedule.server.ts
{packages/core,apps/webapp}/**/*.{ts,tsx}
📄 CodeRabbit inference engine (.github/copilot-instructions.md)
Use zod for validation in packages/core and apps/webapp
Files:
apps/webapp/app/v3/services/checkSchedule.server.ts
**/*.{ts,tsx,js,jsx}
📄 CodeRabbit inference engine (.github/copilot-instructions.md)
Use function declarations instead of default exports
Files:
apps/webapp/app/v3/services/checkSchedule.server.ts
**/*.ts
📄 CodeRabbit inference engine (.cursor/rules/otel-metrics.mdc)
**/*.ts: When creating or editing OTEL metrics (counters, histograms, gauges), ensure metric attributes have low cardinality by using only enums, booleans, bounded error codes, or bounded shard IDs
Do not use high-cardinality attributes in OTEL metrics such as UUIDs/IDs (envId, userId, runId, projectId, organizationId), unbounded integers (itemCount, batchSize, retryCount), timestamps (createdAt, startTime), or free-form strings (errorMessage, taskName, queueName)
When exporting OTEL metrics via OTLP to Prometheus, be aware that the exporter automatically adds unit suffixes to metric names (e.g., 'my_duration_ms' becomes 'my_duration_ms_milliseconds', 'my_counter' becomes 'my_counter_total'). Account for these transformations when writing Grafana dashboards or Prometheus queries
Files:
apps/webapp/app/v3/services/checkSchedule.server.ts
apps/webapp/**/*.{ts,tsx}
📄 CodeRabbit inference engine (.cursor/rules/webapp.mdc)
apps/webapp/**/*.{ts,tsx}: Access environment variables through theenvexport ofenv.server.tsinstead of directly accessingprocess.env
Use subpath exports from@trigger.dev/corepackage instead of importing from the root@trigger.dev/corepathDo not reintroduce the removed v1 execution path;
RunEngineVersion.V1branches may only reject or finalize gracefully so v3 clients receive a clean 4xx, never a 5xx.
Files:
apps/webapp/app/v3/services/checkSchedule.server.ts
apps/**/*.{ts,tsx}
📄 CodeRabbit inference engine (AGENTS.md)
For apps, use
typecheckfor verification and never usebuildas the correctness check.
Files:
apps/webapp/app/v3/services/checkSchedule.server.ts
apps/webapp/app/**/*.{ts,tsx}
📄 CodeRabbit inference engine (apps/webapp/CLAUDE.md)
apps/webapp/app/**/*.{ts,tsx}: For dashboard changes, visually verify the running Remix app with Chrome DevTools MCP, using snapshots, screenshots, interaction, and console-message checks as appropriate.
UseuseCallbackanduseMemoonly for context provider values, expensive derived data used as a dependency, or stable references required by dependency arrays; do not wrap ordinary event handlers or trivial computations.
Use named constants for sentinel or placeholder values instead of scattering raw string literals across comparisons.
Files:
apps/webapp/app/v3/services/checkSchedule.server.ts
apps/webapp/app/**/*.ts
📄 CodeRabbit inference engine (apps/webapp/CLAUDE.md)
apps/webapp/app/**/*.ts: Never userequest.signalto detect client disconnects. UsegetRequestAbortSignal()fromapp/services/httpAsyncStorage.server.ts, which is wired to Express response close events.
Access environment variables through theenvexport fromapp/env.server.ts; never useprocess.envdirectly.
Always use PrismafindFirstinstead offindUnique.
Always use the$transactionhelper from~/db.server, never callprisma.$transactionor$replica.$transactiondirectly. Pass isolation levels as strings, useSerializablefor correctness-critical read-then-write invariants, and guard possibly undefined helper results when a definite value is required.
Files:
apps/webapp/app/v3/services/checkSchedule.server.ts
apps/webapp/app/v3/**/*.ts
📄 CodeRabbit inference engine (apps/webapp/CLAUDE.md)
New code must target Run Engine V2 through the singleton in
app/v3/runEngine.server.ts; do not reintroduce V1 execution paths. V1 branches may only reject or finalize gracefully with a clean 4xx.
Files:
apps/webapp/app/v3/services/checkSchedule.server.ts
internal-packages/database/prisma/schema.prisma
📄 CodeRabbit inference engine (internal-packages/database/CLAUDE.md)
internal-packages/database/prisma/schema.prisma: Define the database schema inprisma/schema.prismausing Prisma 6.14.0 for PostgreSQL.
New code must always targetRunEngineVersion.V2;V1is retired and retained only for historical rows and rejection.
Files:
internal-packages/database/prisma/schema.prisma
🧠 Learnings (22)
📚 Learning: 2026-02-03T18:48:31.790Z
Learnt from: 0ski
Repo: triggerdotdev/trigger.dev PR: 2994
File: internal-packages/database/prisma/migrations/20260129162810_add_integration_deployment/migration.sql:14-18
Timestamp: 2026-02-03T18:48:31.790Z
Learning: For Prisma migrations targeting PostgreSQL: - When adding indexes to existing tables, create the index in a separate migration file and include CONCURRENTLY to avoid locking the table. - For indexes on newly created tables (in CREATE TABLE statements), you can create the index in the same migration file without CONCURRENTLY. This reduces rollout complexity for new objects while protecting uptime for existing structures.
Applied to files:
internal-packages/database/prisma/migrations/20260806100000_add_background_worker_task_project_id_slug_created_at_index/migration.sql
📚 Learning: 2026-03-22T13:49:20.068Z
Learnt from: ericallam
Repo: triggerdotdev/trigger.dev PR: 3244
File: internal-packages/database/prisma/migrations/20260318114244_add_prompt_friendly_id/migration.sql:5-5
Timestamp: 2026-03-22T13:49:20.068Z
Learning: For Prisma migration SQL files under `internal-packages/database/prisma/migrations/`, it is acceptable to create indexes with `CREATE INDEX` / `CREATE UNIQUE INDEX` (i.e., without `CONCURRENTLY`) when the parent table is introduced in the same PR and has no existing production rows yet. Only require `CREATE INDEX CONCURRENTLY` (or otherwise account for existing production data/locks) when the table already exists in production with data.
Applied to files:
internal-packages/database/prisma/migrations/20260806100000_add_background_worker_task_project_id_slug_created_at_index/migration.sql
📚 Learning: 2026-05-14T14:54:39.095Z
Learnt from: ericallam
Repo: triggerdotdev/trigger.dev PR: 3545
File: .server-changes/agent-view-sessions.md:10-10
Timestamp: 2026-05-14T14:54:39.095Z
Learning: In the `trigger.dev` repository, do not flag inconsistent dot vs slash notation in route/path strings inside `.server-changes/*.md` files. These markdown files are consumed verbatim into the changelog, so the mixed notation (e.g., `resources.orgs.../runs.$runParam/...`) is intentional and should be preserved as-is.
Applied to files:
.server-changes/faster-schedule-validation-lookup.md
📚 Learning: 2026-07-26T13:14:02.968Z
Learnt from: ericallam
Repo: triggerdotdev/trigger.dev PR: 4378
File: .server-changes/realtime-run-reads-from-primary.md:0-0
Timestamp: 2026-07-26T13:14:02.968Z
Learning: For files in the .server-changes directory, the body text is published verbatim as dashboard-facing user release notes. Write entries in terms of user-visible behavior (what users can do/see), and avoid implementation-oriented details such as environment-variable names, internal mechanisms, or configuration knobs. If you need to include operational/configuration specifics, put those details in the PR description instead of the .server-changes entry.
Applied to files:
.server-changes/faster-schedule-validation-lookup.md
📚 Learning: 2026-03-10T17:56:20.938Z
Learnt from: samejr
Repo: triggerdotdev/trigger.dev PR: 3201
File: apps/webapp/app/v3/services/setSeatsAddOn.server.ts:25-29
Timestamp: 2026-03-10T17:56:20.938Z
Learning: Do not implement local userId-to-organizationId authorization checks inside org-scoped service classes (e.g., SetSeatsAddOnService, SetBranchesAddOnService) in the web app. Rely on route-layer authentication (requireUserId(request)) and org membership enforcement via the _app.orgs.$organizationSlug layout route. Any userId/organizationId that reaches these services from org-scoped routes has already been validated. Apply this pattern across all org-scoped services to avoid redundant auth checks and maintain consistency.
Applied to files:
apps/webapp/app/v3/services/checkSchedule.server.ts
📚 Learning: 2026-03-22T13:26:12.060Z
Learnt from: ericallam
Repo: triggerdotdev/trigger.dev PR: 3244
File: apps/webapp/app/components/code/TextEditor.tsx:81-86
Timestamp: 2026-03-22T13:26:12.060Z
Learning: In the triggerdotdev/trigger.dev codebase, do not flag `navigator.clipboard.writeText(...)` calls for `missing-await`/`unhandled-promise` issues. These clipboard writes are intentionally invoked without `await` and without `catch` handlers across the project; keep that behavior consistent when reviewing TypeScript/TSX files (e.g., usages like in `apps/webapp/app/components/code/TextEditor.tsx`).
Applied to files:
apps/webapp/app/v3/services/checkSchedule.server.ts
📚 Learning: 2026-03-22T19:24:14.403Z
Learnt from: matt-aitken
Repo: triggerdotdev/trigger.dev PR: 3187
File: apps/webapp/app/v3/services/alerts/deliverErrorGroupAlert.server.ts:200-204
Timestamp: 2026-03-22T19:24:14.403Z
Learning: In the triggerdotdev/trigger.dev codebase, webhook URLs are not expected to contain embedded credentials/secrets (e.g., fields like `ProjectAlertWebhookProperties` should only hold credential-free webhook endpoints). During code review, if you see logging or inclusion of raw webhook URLs in error messages, do not automatically treat it as a credential-leak/secrets-in-logs issue by default—first verify the URL does not contain embedded credentials (for example, no username/password in the URL, no obvious secret/token query params or fragments). If the URL is credential-free per this project’s conventions, allow the logging.
Applied to files:
apps/webapp/app/v3/services/checkSchedule.server.ts
📚 Learning: 2026-05-18T08:21:27.694Z
Learnt from: d-cs
Repo: triggerdotdev/trigger.dev PR: 3632
File: apps/webapp/sentry.server.ts:4-21
Timestamp: 2026-05-18T08:21:27.694Z
Learning: When handling Prisma error P1001 ("Can't reach database server") in TypeScript, don’t assume a single error shape. Prisma can surface P1001 via two different error classes/fields: `PrismaClientKnownRequestError` exposes it as `err.code === "P1001"` (common during mid-query connection drops), while `PrismaClientInitializationError` exposes it as `err.errorCode === "P1001"` (common on client startup failure). Therefore, predicates should use `err.code === "P1001" || err.errorCode === "P1001"`. Do not flag `err.code === "P1001"` as “unreachable/never matches,” as it is expected in production.
Applied to files:
apps/webapp/app/v3/services/checkSchedule.server.ts
📚 Learning: 2026-05-18T08:21:27.694Z
Learnt from: d-cs
Repo: triggerdotdev/trigger.dev PR: 3632
File: apps/webapp/sentry.server.ts:4-21
Timestamp: 2026-05-18T08:21:27.694Z
Learning: When handling Prisma errors for P1001 ("Can't reach database server"), do not assume it only appears under a single property name. Prisma may surface P1001 via either `PrismaClientKnownRequestError` (`err.code === "P1001"`, e.g., mid-query connection drops) or `PrismaClientInitializationError` (`err.errorCode === "P1001"`, e.g., client startup connection failure). To reliably detect the condition, check `err.code === "P1001" || err.errorCode === "P1001"`, and avoid review rules that would incorrectly flag `err.code === "P1001"` as unreachable/never-matching.
Applied to files:
apps/webapp/app/v3/services/checkSchedule.server.ts
📚 Learning: 2026-06-13T19:53:13.759Z
Learnt from: ericallam
Repo: triggerdotdev/trigger.dev PR: 3937
File: packages/trigger-sdk/skills/realtime-and-frontend/SKILL.md:258-260
Timestamp: 2026-06-13T19:53:13.759Z
Learning: When reviewing code that uses `trigger.dev/react-hooks`’s `useRealtimeRun`, preserve the call signature where the first argument is the full realtime handle object (not `handle.id`). This is intentional to maintain type-safety and is consistent with the official docs; do not suggest changing the first argument from the handle object to `handle.id`.
Applied to files:
apps/webapp/app/v3/services/checkSchedule.server.ts
📚 Learning: 2026-06-17T17:13:49.929Z
Learnt from: matt-aitken
Repo: triggerdotdev/trigger.dev PR: 3948
File: apps/webapp/app/routes/_app.orgs.$organizationSlug.projects.$projectParam.env.$envParam.bulk-actions.$bulkActionParam/route.tsx:48-62
Timestamp: 2026-06-17T17:13:49.929Z
Learning: In triggerdotdev/trigger.dev, within `dashboardLoader`/`dashboardAction` (or similar context resolver code) whenever you resolve an organization ID from an organization slug for RBAC/enterprise authorization scope, always read from the primary Prisma client (`prisma`), not `$replica`. Using `$replica` can hit replica-lag and cause the RBAC lookup/authorization to run without the correct org scope (bypassing intended role enforcement). Implement the slug→org lookup with `prisma.organization.findFirst(...)` (or equivalent primary-client query) and add an inline comment documenting why the primary client is required (replica lag could lead to unscoped RBAC checks).
Applied to files:
apps/webapp/app/v3/services/checkSchedule.server.ts
📚 Learning: 2026-06-23T13:04:21.413Z
Learnt from: carderne
Repo: triggerdotdev/trigger.dev PR: 4023
File: apps/webapp/app/services/upsertBranch.server.ts:14-18
Timestamp: 2026-06-23T13:04:21.413Z
Learning: In TypeScript, it’s valid to `import { type X }` and then use `typeof X` in a type-only position, e.g. `type Alias = z.infer<typeof X>`. The `type` modifier suppresses the runtime import, but the type checker still has the full exported type so `z.infer<typeof X>` can resolve correctly. In code reviews, don’t flag this as a TypeScript compile error as long as `typeof X` is used in a type context (e.g., with `z.infer`, `type` aliases, generics), not as a runtime value.
Applied to files:
apps/webapp/app/v3/services/checkSchedule.server.ts
📚 Learning: 2026-03-29T19:16:28.864Z
Learnt from: nicktrn
Repo: triggerdotdev/trigger.dev PR: 3291
File: apps/webapp/app/v3/featureFlags.ts:53-65
Timestamp: 2026-03-29T19:16:28.864Z
Learning: When reviewing TypeScript code that uses Zod v3, treat `z.coerce.*()` schemas as their direct Zod type (e.g., `z.coerce.boolean()` returns a `ZodBoolean` with `_def.typeName === "ZodBoolean"`) rather than a `ZodEffects`. Only `.preprocess()`, `.refine()`/`.superRefine()`, and `.transform()` are expected to wrap schemas in `ZodEffects`. Therefore, in reviewers’ logic like `getFlagControlType`, do not flag/unblock failures that require unwrapping `ZodEffects` when the input schema is a `z.coerce.*` schema.
Applied to files:
apps/webapp/app/v3/services/checkSchedule.server.ts
📚 Learning: 2026-06-09T16:27:26.195Z
Learnt from: myftija
Repo: triggerdotdev/trigger.dev PR: 3878
File: apps/webapp/app/v3/services/computeTemplateCreation.server.ts:0-0
Timestamp: 2026-06-09T16:27:26.195Z
Learning: When working in triggerdotdev/trigger.dev code related to worker-group/region default resolution (e.g., defaultWorkerInstanceGroupId handling used by getGlobalDefaultWorkerGroup, getDefaultWorkerGroupForProject, and RegionsPresenter), do NOT add org-level featureFlags overrides in only one resolution site. That can cause template creation routing/decisions to diverge from actual run routing. If org-level override of the default region/worker group is required, it must be centralized in getGlobalDefaultWorkerGroup so every resolution path remains aligned.
Applied to files:
apps/webapp/app/v3/services/checkSchedule.server.ts
📚 Learning: 2026-05-05T09:38:02.512Z
Learnt from: d-cs
Repo: triggerdotdev/trigger.dev PR: 3523
File: apps/webapp/app/routes/api.v3.batches.ts:178-181
Timestamp: 2026-05-05T09:38:02.512Z
Learning: When reviewing code that catches `ServiceValidationError` in `*.server.ts` files, do not blindly forward `error.status` to HTTP responses, because SVEs may be thrown with non-default statuses (e.g., 400/500) and forwarding them can cause client-visible behavioral regressions (e.g., surfacing 500s to clients). Prefer a safe default response status of `error.status ?? 422`, but only after confirming via the reachable call graph that the caught `ServiceValidationError` instances are expected to carry those non-default statuses; otherwise, normalize to `422` to avoid unexpected client-visible 5xx behavior.
Applied to files:
apps/webapp/app/v3/services/checkSchedule.server.ts
📚 Learning: 2026-05-12T21:04:05.815Z
Learnt from: ericallam
Repo: triggerdotdev/trigger.dev PR: 3542
File: apps/webapp/app/components/sessions/v1/SessionStatus.tsx:1-3
Timestamp: 2026-05-12T21:04:05.815Z
Learning: In this Remix + TypeScript codebase, do not flag a server/client boundary violation when a file imports only types from a module matching `*.server`.
Specifically, it’s safe to import types using `import type { Foo } from "*.server"` or `import { type Foo } from "*.server"` because TypeScript erases type-only imports at compile time and they emit no JavaScript, so they won’t cross the Remix server/client bundle boundary.
Only raise the boundary concern for value imports (e.g., `import { Foo }` without `type`, or `import Foo`), since those produce JavaScript output.
Applied to files:
apps/webapp/app/v3/services/checkSchedule.server.ts
📚 Learning: 2026-06-25T18:21:51.905Z
Learnt from: carderne
Repo: triggerdotdev/trigger.dev PR: 4039
File: apps/webapp/app/routes/invite-revoke.tsx:0-0
Timestamp: 2026-06-25T18:21:51.905Z
Learning: During the Zod v4 migration in the triggerdotdev/trigger.dev webapp, ensure any imports from `conform-to/zod` use the Zod-4 subpath: `conform-to/zod/v4` (e.g., `import { parseWithZod } from "conform-to/zod/v4"`). Do not import from the package root `conform-to/zod`, because it is the Zod 3 implementation and may load Zod-3-only symbols (e.g., `ZodBranded`, `ZodEffects`), which can throw at module load (notably with `zod4.4.3`). This should be enforced across `apps/webapp/**/*` where helpers like `parseWithZod` and `conformZodMessage` are used.
Applied to files:
apps/webapp/app/v3/services/checkSchedule.server.ts
📚 Learning: 2026-07-03T17:10:21.498Z
Learnt from: 0ski
Repo: triggerdotdev/trigger.dev PR: 4148
File: apps/webapp/app/models/orgMember.server.ts:149-168
Timestamp: 2026-07-03T17:10:21.498Z
Learning: In triggerdotdev/trigger.dev, `User.email` (Prisma schema: `internal-packages/database/prisma/schema.prisma`) currently does NOT use `citext` and does NOT have a `lower(email)` functional unique index. Therefore, do not introduce Prisma queries like `where: { email: { equals: <value>, mode: "insensitive" } }` (or any case-insensitive lookup) against `User.email`, because it can force sequential scans of the `users` table under load. During review, ensure email is normalized (e.g., lowercased/trimmed) before both writes and subsequent lookups, and if true case-insensitive behavior/uniqueness is required, implement it via a separate app-wide migration (e.g., switch to `citext` and/or add a functional unique index with backfill) rather than bolting it onto individual feature PRs.
Applied to files:
apps/webapp/app/v3/services/checkSchedule.server.ts
📚 Learning: 2026-05-14T08:21:07.614Z
Learnt from: d-cs
Repo: triggerdotdev/trigger.dev PR: 3614
File: apps/webapp/app/v3/mollifier/mollifierGate.server.ts:48-52
Timestamp: 2026-05-14T08:21:07.614Z
Learning: When using Trigger.dev v3 feature flags in the webapp, prefer the existing per-org gating mechanism supported by `flag()` via the `overrides` argument. Pass `Organization.featureFlags` (from `environment.organization.featureFlags`) as the `overrides` value; overrides must take precedence over the global `featureFlag` row. Do not require schema changes or add an `orgId` field to `FlagsOptions` for per-org gating—use the overrides pattern consistently (e.g., in gate flows like `resolveOrgFlag` and any server code that threads `environment.organization.featureFlags` into the gate call).
Applied to files:
apps/webapp/app/v3/services/checkSchedule.server.ts
📚 Learning: 2026-06-04T18:16:35.386Z
Learnt from: nicktrn
Repo: triggerdotdev/trigger.dev PR: 3836
File: apps/supervisor/src/backpressure/backpressureMonitor.ts:3-5
Timestamp: 2026-06-04T18:16:35.386Z
Learning: When reviewing TypeScript in this repo, apply the rule “prefer type aliases over interfaces” only to data/object shapes and union/intersection type modeling. If an interface is being used as a behavioral contract for collaborators to implement (e.g., method-shape interfaces that define required behavior, such as `BackpressureLogger` / `BackpressureSignalSource` in `apps/supervisor/src/backpressure/backpressureMonitor.ts`), keep it as an `interface` and do not flag it as a type-alias-vs-interface violation.
Applied to files:
apps/webapp/app/v3/services/checkSchedule.server.ts
📚 Learning: 2026-06-09T17:58:04.699Z
Learnt from: 0ski
Repo: triggerdotdev/trigger.dev PR: 3879
File: apps/webapp/app/models/vercelIntegration.server.ts:619-630
Timestamp: 2026-06-09T17:58:04.699Z
Learning: In this codebase, outbound raw `fetch` calls should typically rely on Node/undici’s default request timeout (about ~300s) rather than adding a per-call `AbortController` + `setTimeout` wrapper inside individual functions (e.g. in files like `apps/webapp/app/models/vercelIntegration.server.ts`). During code review, do not flag the absence of a per-call timeout on a single `fetch` as an issue; if per-call timeouts are needed, they should be implemented via a codebase-wide convention (e.g., a shared fetch wrapper or documented pattern) rather than ad-hoc per-function changes.
Applied to files:
apps/webapp/app/v3/services/checkSchedule.server.ts
📚 Learning: 2026-04-30T21:28:35.705Z
Learnt from: samejr
Repo: triggerdotdev/trigger.dev PR: 3473
File: internal-packages/database/prisma/schema.prisma:59-60
Timestamp: 2026-04-30T21:28:35.705Z
Learning: When reviewing Prisma schema files in this repository, do not suggest using Prisma’s `@check` model/table-level attribute or any native Prisma schema syntax for CHECK constraints. Prisma does not implement CHECK constraints (see prisma/prisma#3388). If a CHECK constraint is required, add it only via raw SQL in a handwritten migration (e.g., `ALTER TABLE ... ADD CONSTRAINT ... CHECK (...)`).
Applied to files:
internal-packages/database/prisma/schema.prisma
🔇 Additional comments (3)
internal-packages/database/prisma/schema.prisma (1)
755-755: LGTM!internal-packages/database/prisma/migrations/20260806100000_add_background_worker_task_project_id_slug_created_at_index/migration.sql (1)
1-1: LGTM!apps/webapp/app/v3/services/checkSchedule.server.ts (1)
48-50: LGTM!
2 participants
Implementing PlanetScale Insights improvement.
Summary
Validating a schedule (creating or updating one through the API or the dashboard, and deploying a project that declares schedules) looks up the newest version of a task by slug. That lookup reads every version of the task and sorts them to return one. A project gains a row per task on every deploy, so the work grows with the project's age: the oldest projects pay the most, and dev-mode redeploys make it worse. This was picked because it was the largest single consumer of database time on the schedules path, and the fix is a sort key with no index behind it.
Fix
BackgroundWorkerTaskis indexed on(projectId, slug), which serves the equality but not theORDER BY createdAt DESC. Postgres seeks the index, then bitmap-scans and top-N sorts the whole group to produce a single row. AddingcreatedAtto the index lets it scan backward and stop at the first row.The same call site also selected all 21 columns, including five JSON blobs, to read one field (
triggerSource), so it now selects that field alone.Benchmark
Local Postgres 17, 997,000 seeded rows / 748 MB, group sizes chosen to match the distribution seen in production.
An ascending index scanned backward is enough here, so no descending index is needed.
Impact and risk
Real-world gain lands between the two rows above and scales with how many deploys a project has accumulated. Projects with few deploys will see little change, since there is barely anything to sort.
The new index costs noticeably more than the existing two-column one: 43 MB against 7.3 MB on the benchmark rig. Adding
createdAtmakes every key unique, which defeats btree deduplication, so this is a real disk and write cost rather than a rounding error. Writes to this table happen at deploy time, not on the run path, so the write amplification is acceptable. The existing(projectId, slug)index is now a redundant prefix and could be dropped, but this PR keeps it so index usage can be observed before removing it.Behavior is unchanged: same predicate, same ordering, same row returned. The narrowed select is the only code change, and the field it keeps is the only one the caller read.
Deploy note: the migration is
20260806100000_add_background_worker_task_project_id_slug_created_at_indexand usesCREATE INDEX CONCURRENTLY IF NOT EXISTS, so it can be pre-applied by hand before the deploy.