feat(postgres): SQL function entities + refuse client-generator raw defaults - #30355
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Capture the client vs DB default plane mismatch, issue draft, and sliced plan so maintainers can direction-fit before larger follow-ups. Co-authored-by: Cursor <cursoragent@cursor.com> Signed-off-by: Rhae-Shane <omeshkumar9813499778@gmail.com> Co-authored-by: Cursor <cursoragent@cursor.com>
Bare nanoid/uuid/cuid/ulid calls in sql`...` or dbgenerated() almost always mean the Prisma client generator, not a Postgres function. Fail authoring with a fix hint instead of emitting DEFAULT that breaks migrate. Signed-off-by: Rhae-Shane <omeshkumar9813499778@gmail.com> Co-authored-by: Cursor <cursoragent@cursor.com>
Add PostgresFunction authoring (PSL + pgFunction), schema-IR, and CREATE/DROP planning in the dep/dropType buckets so a declared function exists before column defaults that call it. Signed-off-by: Rhae-Shane <omeshkumar9813499778@gmail.com> Co-authored-by: Cursor <cursoragent@cursor.com>
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Included review availability: Your plan provides up to 10 included reviews per hour; 6 remain after this review. 📝 WalkthroughWalkthroughThe change rejects raw defaults that resemble client-side generators and adds managed PostgreSQL function entities. PostgreSQL authoring, schema representation, migration planning, SQL operations, control policies, tests, and documentation cover these behaviors. ChangesClient generator validation
PostgreSQL function support
Priority: ➖ Normal Estimated code review effort: 4 (Complex) | ~60 minutes Change: Feature Sequence Diagram(s)sequenceDiagram
participant Authoring
participant Contract
participant IssuePlanner
participant PostgresMigration
Authoring->>Contract: lower function definition
Contract->>IssuePlanner: provide function schema node
IssuePlanner->>PostgresMigration: createFunction or dropFunction
PostgresMigration->>PostgresMigration: render SQL operation
Suggested reviewers: 🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
✨ Finishing Touches🧪 Generate unit tests (beta)
Comment |
… policy Function schema nodes were missing from postgresNodeStorageCoordinate, so ownership and control-policy partitions could not treat them as first-class entities. Wire the coordinate and add managed/external/tolerated/observed DROP coverage plus sibling-ownership selectivity. Signed-off-by: Rhae-Shane <omeshkumar9813499778@gmail.com> Co-authored-by: Cursor <cursoragent@cursor.com>
Align DDL with the planner: body/signature drift is a conflict (drop and recreate), so migrate must not emit CREATE OR REPLACE and imply replace works. Signed-off-by: Rhae-Shane <omeshkumar9813499778@gmail.com> Co-authored-by: Cursor <cursoragent@cursor.com>
Document name-only identity (overloads unsupported), bucket-only deps for simple app-owned helpers, opaque unchecked bodies, create/drop-only updates, and that app_nanoid naming is temporary — not a permanent ban on DB nanoid. Signed-off-by: Rhae-Shane <omeshkumar9813499778@gmail.com> Co-authored-by: Cursor <cursoragent@cursor.com>
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Inline comments:
In `@packages/2-sql/1-core/contract/src/default-sql-body.ts`:
- Line 4: Update CLIENT_GENERATOR_CALL to recognize quoted generator names and
optional whitespace around schema qualification and the dot, while preserving
existing unquoted forms. Ensure authoring and lowering paths classify PostgreSQL
and SQLite defaults such as quoted nanoid calls as client-generator functions,
and add tests covering these spellings and emitted defaults.
In
`@packages/3-targets/3-targets/postgres/src/core/migrations/operations/functions.ts`:
- Line 76: Update DropFunctionCall and its SQL generation so DROP FUNCTION uses
only input argument types, excluding argument names, modes, and DEFAULT clauses,
rather than reusing the CREATE signature. Preserve the full declaration for
CREATE while providing a separate normalized identity signature to generate
valid removal SQL.
In
`@packages/3-targets/3-targets/postgres/src/core/migrations/postgres-migration.ts`:
- Around line 221-247: Update createFunction and dropFunction to pass
this.controlAdapterFor('createFunction') and
this.controlAdapterFor('dropFunction') respectively into their
CreateFunctionCall and DropFunctionCall toOp calls, preserving the shared
control-stack guard used by other operation builders.
In
`@packages/3-targets/3-targets/postgres/test/migrations/function-planner.test.ts`:
- Line 73: Update the test setups using buildPostgresPlanDiff and planIssues to
match the current planner APIs: provide actualSchema and frameworkComponents,
pass a single IssuePlannerOptions object, use the expected roles shape instead
of {}, and read result.failure rather than result.error. Apply these changes
consistently to both affected test cases while preserving their existing
assertions.
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projects/postgres-sql-functions/README.mdis excluded by!projects/**projects/postgres-sql-functions/github-issue.mdis excluded by!projects/**projects/postgres-sql-functions/plan.mdis excluded by!projects/**projects/postgres-sql-functions/spec.mdis excluded by!projects/**
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docs/reference/error-reference.mdpackages/1-framework/2-authoring/ids/README.mdpackages/2-sql/1-core/contract/src/default-sql-body.tspackages/2-sql/1-core/contract/src/exports/validators.tspackages/2-sql/2-authoring/contract-psl/README.mdpackages/2-sql/2-authoring/contract-psl/test/interpreter.defaults.tagged-literal.test.tspackages/2-sql/2-authoring/contract-ts/src/contract-errors.tspackages/2-sql/2-authoring/contract-ts/src/sql-default-literal.tspackages/2-sql/2-authoring/contract-ts/test/sql-default-literal.test.tspackages/2-sql/9-family/src/core/sql-default-literal-tag.tspackages/2-sql/9-family/src/exports/control.tspackages/2-sql/9-family/test/sql-default-literal-tag.test.tspackages/3-extensions/postgres/src/contract/function.tspackages/3-extensions/postgres/src/exports/contract-builder.tspackages/3-extensions/postgres/test/contract-builder/function-entity.test.tspackages/3-targets/3-targets/postgres/src/core/authoring.tspackages/3-targets/3-targets/postgres/src/core/entity-kinds.tspackages/3-targets/3-targets/postgres/src/core/migrations/contract-to-postgres-database-schema-node.tspackages/3-targets/3-targets/postgres/src/core/migrations/control-policy.tspackages/3-targets/3-targets/postgres/src/core/migrations/issue-planner.tspackages/3-targets/3-targets/postgres/src/core/migrations/op-factory-call.tspackages/3-targets/3-targets/postgres/src/core/migrations/operations/functions.tspackages/3-targets/3-targets/postgres/src/core/migrations/planner.tspackages/3-targets/3-targets/postgres/src/core/migrations/postgres-migration.tspackages/3-targets/3-targets/postgres/src/core/postgres-function.tspackages/3-targets/3-targets/postgres/src/core/postgres-schema.tspackages/3-targets/3-targets/postgres/src/core/postgres-validators.tspackages/3-targets/3-targets/postgres/src/core/schema-ir/node-storage-coordinate.tspackages/3-targets/3-targets/postgres/src/core/schema-ir/postgres-function-schema-node.tspackages/3-targets/3-targets/postgres/src/core/schema-ir/postgres-namespace-schema-node.tspackages/3-targets/3-targets/postgres/src/core/schema-ir/schema-node-kinds.tspackages/3-targets/3-targets/postgres/src/exports/types.tspackages/3-targets/3-targets/postgres/test/migrations/function-control-policy.test.tspackages/3-targets/3-targets/postgres/test/migrations/function-planner.test.tspackages/3-targets/3-targets/postgres/test/postgres-schema.test.tspackages/3-targets/6-adapters/postgres/src/core/control-mutation-defaults.tspackages/3-targets/6-adapters/sqlite/src/core/control-mutation-defaults.ts
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…ching Normalize DROP FUNCTION to input types only, wire controlAdapterFor for create/dropFunction, broaden CLIENT_GENERATOR_CALL for quoted/whitespace forms, and align function planner tests with current planner APIs. Co-authored-by: Cursor <cursoragent@cursor.com>
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Actionable comments posted: 4
- 🪄 Fix CodeRabbit comments on this PR
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Inline comments:
In `@packages/2-sql/1-core/contract/src/default-sql-body.ts`:
- Line 9: Update the generator-default regex so the i flag applies only to bare
identifiers, while quoted generator names match exact lowercase casing; ensure
quoted "NANOID"(16) is rejected and returns undefined in the default parsing
flow.
In
`@packages/3-targets/3-targets/postgres/src/core/migrations/operations/functions.ts`:
- Line 98: Update the DEFAULT detection condition in the argument parsing logic
to require a left token boundary as well as the existing right boundary, so
DEFAULT is recognized only at the start or after whitespace and identifiers such
as mydefault are not truncated.
- Around line 47-49: Update splitTopLevelArgs to recognize PostgreSQL
dollar-quoted strings, including tagged delimiters, and ignore commas and
nesting inside them while splitting. Preserve existing single- and double-quote
handling and ensure declarations such as DEFAULT $$a,b$$ produce the correct
top-level argument list.
- Line 153: In the argument-processing logic, replace the stripLeadingArgName
call with the already-cleaned body value when appending to types. Preserve the
existing removal of defaults, modes, and OUT arguments so DROP FUNCTION retains
complete unnamed PostgreSQL type expressions.
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packages/2-sql/1-core/contract/src/default-sql-body.tspackages/2-sql/1-core/contract/test/default-sql-body.test.tspackages/2-sql/2-authoring/contract-psl/test/interpreter.defaults.tagged-literal.test.tspackages/2-sql/2-authoring/contract-ts/test/sql-default-literal.test.tspackages/2-sql/9-family/test/sql-default-literal-tag.test.tspackages/3-targets/3-targets/postgres/src/core/migrations/op-factory-call.tspackages/3-targets/3-targets/postgres/src/core/migrations/operations/functions.tspackages/3-targets/3-targets/postgres/src/core/migrations/postgres-migration.tspackages/3-targets/3-targets/postgres/test/migrations/function-planner.test.tspackages/3-targets/3-targets/postgres/test/postgres-migration-op-builders.test.tspackages/3-targets/6-adapters/postgres/test/control-mutation-defaults.test.tspackages/3-targets/6-adapters/sqlite/test/control-mutation-defaults.test.ts
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- packages/3-targets/3-targets/postgres/src/core/migrations/postgres-migration.ts
- packages/3-targets/3-targets/postgres/test/migrations/function-planner.test.ts
- packages/3-targets/3-targets/postgres/src/core/migrations/op-factory-call.ts
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Require exact lowercase for quoted client-generator names, skip dollar-quoted DEFAULT values when splitting args, keep full type expressions after stripping defaults/modes, and avoid matching DEFAULT inside identifiers. Co-authored-by: Cursor <cursoragent@cursor.com>
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Inline comments:
In `@packages/2-sql/1-core/contract/src/default-sql-body.ts`:
- Around line 12-14: Update CLIENT_GENERATOR_QUOTED and CLIENT_GENERATOR_BARE to
accept doubled quotes within the optional quoted schema qualifier, while
preserving existing generator matching behavior. Add regression coverage for
quoted and bare generator names qualified by an escaped schema identifier such
as "app""id".
In
`@packages/3-targets/3-targets/postgres/src/core/migrations/operations/functions.ts`:
- Around line 24-25: Update the dollar-quote detection in skipDollarQuoted to
require an identifier boundary before matching DOLLAR_TAG, rejecting delimiters
immediately preceded by an identifier character while preserving valid
standalone dollar quotes. Add a regression case covering an argument name such
as foo$tag$ int DEFAULT 1 and verify functionIdentitySignature does not retain
the DEFAULT clause.
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packages/2-sql/1-core/contract/src/default-sql-body.tspackages/2-sql/1-core/contract/test/default-sql-body.test.tspackages/3-targets/3-targets/postgres/src/core/migrations/op-factory-call.tspackages/3-targets/3-targets/postgres/src/core/migrations/operations/functions.tspackages/3-targets/3-targets/postgres/test/migrations/function-planner.test.ts
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Accept doubled quotes in schema-qualified client-generator lookalikes, reject dollar-quote delimiters glued to identifiers, and treat doubled double-quotes as escapes inside double-quoted function argument names. Co-authored-by: Cursor <cursoragent@cursor.com>
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Inline comments:
In
`@packages/3-targets/3-targets/postgres/src/core/migrations/operations/functions.ts`:
- Line 27: Update the parser’s identifier-boundary predicate in functions.ts at
lines 27-27 and 116-116 to recognize all PostgreSQL identifier characters,
including non-ASCII letters, rather than relying on [\w$]. Apply the same
predicate both before dollar-quote parsing and before recognizing DEFAULT,
preserving valid boundaries while preventing incorrect parsing after identifiers
such as é$tag$ or within éDEFAULT.
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packages/2-sql/1-core/contract/src/default-sql-body.tspackages/2-sql/1-core/contract/test/default-sql-body.test.tspackages/3-targets/3-targets/postgres/src/core/migrations/operations/functions.tspackages/3-targets/3-targets/postgres/test/migrations/function-planner.test.ts
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Use a Unicode-aware identifier predicate for dollar-quote and DEFAULT token boundaries so names like e-acute$tag$ or e-acuteDEFAULT are not misparsed. Co-authored-by: Cursor <cursoragent@cursor.com>
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Thanks for this, @Rhae-Shane. Here's a review of both parts, so you know why we're not merging it and what a future version would need.
Refusing raw defaults that look like client generators
We won't take this part.
dbgenerated(...)no longer exists in Prisma 8. #30380 removed it, along withlowerDbgenerated, which this PR edits. Raw SQL defaults are now written@default(sql`...`).- The body of a
sqldefault is opaque on purpose. ADR 129 refuses onlynow()andautoincrement(), because those two strings have a special meaning to Prisma inside the contract. Every other body passes through unchanged, and a test checks exactly that withsql`uuid()`. This PR deletes that case. nanoidis a real name for a database function. The common Postgres nanoid implementation is callednanoid, so refusingsql`nanoid(16)`would break working schemas.@default(nanoid(16))already means the client-side generator, andsql`...`already means "this is database SQL".
Postgres functions as contract entities
We're interested in this idea, and wiring it in alongside native enums is the right approach: the entity kind, the schema IR node, the storage coordinate, the control policy and the create and drop operations. But it isn't ready to build on as it stands:
- Functions are never read back from the database. Introspection builds each namespace from tables and native enums only, and this PR doesn't change that.
db initanddb updateintrospect the live database and plan from the difference, so a declared function always looks missing. The first run creates it. The next run issuesCREATE FUNCTIONagain and fails, because the function already exists. Every test in the PR is a unit test, so nothing runs the generated SQL against a database. - Functions are compared as raw text. Once functions are read back, Postgres prints signatures and return types in its own form:
size int DEFAULT 16comes back assize integer DEFAULT 16. Comparing text would then report differences that aren't there. This needs either typed parameters or normalization. For raw defaults, ADR 129 normalizes by running both sides through the target's parser. - The volatility default is wrong. Postgres defaults to
VOLATILE, but this defaults toSTABLE. A nanoid function returns a different value on every call, so it must beVOLATILE. DROP FUNCTIONdepends on a hand-written argument-list parser. It's only needed because the signature is stored as a string. Once introspection exists, the database reports a function's identity directly withpg_get_function_identity_arguments.- A function can't be changed. Editing the body is refused with "drop and recreate". A function that a column default uses can't be dropped until the default is removed, so every edit takes two migrations.
- Writing a body in PSL is awkward. The body is a double-quoted string, so multi-line PL/pgSQL needs escaped newlines.
- Some code was left over from the native enum implementation.
pgFunction()validation raisesCONTRACT.ENUM_INVALID, the PSL block's@@mapreusesnativeEnumMapAttribute, and the operations label their target as atype.
There are also design questions we need to settle before anyone implements this. How is a function identified, including overloads? How are changes migrated? How are functions ordered against the tables, types and extensions they depend on? For example, Postgres checks a LANGUAGE sql function's body when the function is created. Creating functions before tables means such a function can't reference a table created in the same migration.
Until then, a hand-written migration can create the function with a rawSql operation placed before the table that uses it. See this migration, which does the same for an extension.
For next time
- CONTRIBUTING.md asks for an issue before substantive work. You'd already drafted one in
projects/postgres-sql-functions/github-issue.md. Filing it first would have let us point out thedbgeneratedremoval and the open design questions before you wrote the code. - Four commits (
c234465,53a6423,31aa484,bf1850f) are missing the DCOSigned-off-by:line.
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Hi @Rhae-Shane, thanks for taking the time on this, we really appreciate it! However I'm going to close this PR because it isn't the right fix for this problem.
Regarding function entities, I love that you took this on, and the way you wired it in alongside native enums is a good starting point. Before it can go into the public API we need to settle a few things: how functions are identified (including overloads), how changes to them are migrated, how we read them back from the database, and dependency ordering. If you'd like to help work that out, come find me on Discord: https://discord.gg/J9xxuQQQq |
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Summary
projects/postgres-sql-functionscontribution for declaring Postgres SQL functions so storage defaults likeDEFAULT app_nanoid(16)can be migrated without inventing undeclared objects.dbgenerateddefaults that look like client ID generators (nanoid(),cuid(), …) with a clear diagnostic pointing authors at either client defaults or a declared DB function.pgFunction/ function IR) withCREATE OR REPLACE/DROPmigration ops, planner wiring, and dependency ordering before column defaults.Commits
docs: shape postgres SQL functions project for nanoid defaultsfeat(sql): refuse raw defaults that look like client ID generatorsfeat(postgres): manage SQL functions as contract entities in migrationsTest plan
pnpm testfor affected packages (contract,contract-ts,9-family,postgres) on Node ≥24@default(dbgenerated(nanoid(16)))/ equivalent TS raw defaultspgFunctionround-trips authoring → planner →CREATE OR REPLACE FUNCTION/DROP FUNCTIONSummary by CodeRabbit
New Features
Bug Fixes
nanoid()oruuid(), are now rejected with guidance for valid alternatives.Documentation