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Highlights

Preview support for PlanetScale and Neon serverless database drivers

We’re excited to announce Preview support for the Neon and PlanetScale database drivers. The PlanetScale and Neon database drivers allow Prisma to connect to your database using protocols besides TCP — HTTP (PlanetScale) or WebSockets (Neon).

To get started with the serverless database drivers, first enable the driverAdapters Preview feature flag in your Prisma schema:

// schema.prisma
generator client {
  provider        = "prisma-client-js"
  previewFeatures = ["driverAdapters"]
}

Next, to set up Prisma Client to use the serverless database drivers:

PlanetScale

Install the Prisma adapter for PlanetScale and PlanetScale serverless database driver, and undici:

npm install @prisma/adapter-planetscale @planetscale/database undici

Update your Prisma Client instance to use the PlanetScale database driver:

// Import required dependencies
import { connect } from '@planetscale/database';
import { PrismaPlanetScale } from '@prisma/adapter-planetscale';
import { PrismaClient } from '@prisma/client';
import { fetch as undiciFetch } from 'undici';

// Initialize Prisma Client with the PlanetScale serverless database driver
const connection = connect({ url: connectionString, fetch: undiciFetch });
const adapter = new PrismaPlanetScale(connection);
const prisma = new PrismaClient({ adapter });

Neon

Install the Prisma adapter for Neon, Neon database driver and undici (WebSockets):

npm install @prisma/adapter-neon @neondatabase/serverless undici

Update your Prisma Client instance to use the Neon serverless database driver:

// Import required dependencies
import { Pool, neonConfig } from '@neondatabase/serverless';
import { PrismaNeon } from '@prisma/adapter-neon';
import { PrismaClient } from '@prisma/client';
import { WebSocket } from 'undici'

neonConfig.webSocketConstructor = WebSocket;

// Initialize Prisma Client with the Neon serverless database driver
const pool = new Pool({ connectionString: process.env.DATABASE_URL });
const adapter = new PrismaNeon(pool);
const prisma = new PrismaClient({ adapter });

Let us know your feedback about the Neon or Planetscale serverless database drivers in the linked GitHub discussions. Create a bug report if you run into any issues.

Early Access support Turso

Turso is an edge-hosted, distributed database that's based on libSQL, an open-source and open-contribution fork of SQLite, enabling you to bring data closer to your application and minimize query latency.

Since support for Turso is in Early Access, there may be some rough edges which we’re still working on it to improve the API and overall support. Additionally, it is behind the driverAdapters Preview feature flag. Enable it to get started using Turso in your project:

// schema.prisma
generator client {
  provider        = "prisma-client-js"
  previewFeatures = ["driverAdapters"]
}

Next, install the Prisma Client adapter for Turso and the libSQL database client

npm install @prisma/adapter-libsql @libsql/client

Update your Prisma Client instance:

// Import required dependencies
import { PrismaClient } from '@prisma/client'
import { PrismaLibSQL } from '@prisma/adapter-libsql'
import { createClient } from '@libsql/client'

// Create a new instance of the libSQL database client
const libsql = createClient({
  // @ts-expect-error
  url: process.env.TURSO_DATABASE_URL,
  authToken: process.env.TURSO_AUTH_TOKEN 
})

// Create a Prisma "adapter" for libSQL
const adapter = new PrismaLibSQL(libsql)
// Pass the adapter option to the Prisma Client instance
const prisma = new PrismaClient({ adapter })

You can learn more on how to use Prisma together with Turso in the announcement blog post.

Try it out! Let us know what you think and create a bug report if you run into any issues.

Query performance improvements

In our continued efforts to make Prisma Client faster, we identified and improved the performance of different types of queries.

Relation filters improvements

We made the following improvements to relation filters:

• Removed an unnecessary INNER JOIN used in relation filter queries (Big thank you to @KhooHaoYit for helping out)
• Use of LEFT JOIN's for one-to-one relations. Previously, Prisma made use of sub-queries to fetch data.

Example Prisma Client query

prisma.comment.findMany({
  where: {
    post: {
      author: {
        name: "John"
      }
    }
  }
})

Before 5.4.0

SELECT
  "Comment"."id"
FROM
  "Comment"
WHERE
  ("Comment"."id") IN (
    SELECT
      "t0"."id"
    FROM
      "Comment" AS "t0"
      INNER JOIN "Post" AS "j0" ON ("j0"."id") = ("t0"."postId")
    WHERE
      (
        ("j0"."id") IN (
          SELECT
            "t1"."id"
          FROM
            "Post" AS "t1"
            INNER JOIN "User" AS "j1" ON ("j1"."id") = ("t1"."userId")
          WHERE
            (
              "j1"."name" = $ 1
              AND "t1"."id" IS NOT NULL
            )
        )
        AND "t0"."id" IS NOT NULL
      )
  );

After 5.4.0

SELECT
  "Comment"."id"
FROM
  "Comment"
  LEFT JOIN "Post" AS "j1" ON ("j1"."id") = ("Comment"."postId")
  LEFT JOIN "User" AS "j2" ON ("j2"."id") = ("j1"."userId")
WHERE
  (
    "j2"."name" = $ 1
    AND ("j2"."id" IS NOT NULL)
    AND ("j1"."id" IS NOT NULL)
  );

If you’re interested in more details on the relation query filter improvements, you can take a look at this pull request.

Enum improvements on PostgreSQL and CockroachDB

Previously, when an enum value was used in a query, our Postgres driver would make additional queries to resolve the enum types that were used.

In this release, we’re making improvements by casting enums to TEXT to avoid the additional roundtrips when resolving the types.

This change should have the most impact if you’re using pgBouncer or if you’re running Prisma in a serverless environment, where our Postgres driver can’t cache enum types information.

Prisma schema

model User {
  id   Int  @id @default(cuid())
  role Role
}

enum Role {
  User
  Admin
}

Prisma Client query

await prisma.user.findMany({ 
  where: {
    role: "Admin"
  }
})

Before 5.4.0

-- Internal driver query
SELECT t.typname, t.typtype, t.typelem, r.rngsubtype, t.typbasetype, n.nspname, t.typrelid FROM pg_catalog.pg_type t LEFT OUTER JOIN pg_catalog.pg_range r ON r.rngtypid = t.oid INNER JOIN pg_catalog.pg_namespace n ON t.typnamespace = n.oid WHERE t.oid = $1;

-- Internal driver query
SELECT enumlabel FROM pg_catalog.pg_enum WHERE enumtypid = $1 ORDER BY enumsortorder;

-- Prisma Client query
SELECT id, role FROM "User" WHERE role = $1;

After 5.4.0

-- Prisma Client query
SELECT id, role::text FROM "User" WHERE role = CAST($1::text AS "Role);

Bulk delete improvements

We optimized the deleteMany operation by:

• Removing all SELECT queries used to fetch data that would be used as input for the DELETE operation. In some cases, this also improves index usage.
• Removing the transaction previously used as it’s now a single atomic operation.

Prisma Client query

await prisma.post.deleteMany({
  where: {
    id: {
      gt: 1,
      lt: 10,
    }
  }
})

Before 5.4.0

BEGIN
SELECT id FROM "Post" WHERE id > 1 AND id < 10;
SELECT id FROM "Post" WHERE id > 1 AND id < 10 AND id IN (<...select ids>);
DELETE FROM "Post" WHERE id IN (<...select ids>) AND id > 1 AND id < 10;
COMMIT

After 5.4.0

DELETE FROM "Post" WHERE id > 1 AND id < 10;

Upsert improvements

We improved the upsert operation (non-native database upsert) by removing a redundant SELECT query:

Prisma Client query

await prisma.user.upsert({
  where: { email: "[email protected]" },
  create: { email: "[email protected]", firstName: "John" },
  update: { firstName: "Johnny" },
})

Before 5.4.0

SELECT `User`.`id` FROM `User` WHERE `User`.`email` = ?;
SELECT `User`.`id` FROM `User` WHERE `User`.`email` = ?;
UPDATE `prisma`.`User` SET `firstName` = ? WHERE `prisma`.`User`.`id` IN (?) AND `prisma`.`User`.`email` = ?;
SELECT `User`.`id` FROM `User` WHERE `User`.`id` = ?;

After 5.4.0

SELECT `User`.`id` FROM `User` WHERE `User`.`email` = ?;
UPDATE `prisma`.`User` SET `firstName` = ? WHERE `prisma`.`User`.`id` IN (?) AND `prisma`.`User`.`email` = ?;
SELECT `User`.`id` FROM `User` WHERE `User`.`id` = ?;

Fixes and improvements

Prisma Client

• Unnecessary SELECT may be generated by upsert()
• Inefficient deleteMany query generation
• Prisma can generate an overly complex and inefficient query in some cases
• deleteMany optimisation
• CockroachDB: Highly Variable Query Response Times
• Extremely poor relation where clause query
• Enums loaded as part of transaction after UPDATE, slowing down transaction.
• MongoDB deleteMany seems to send 2 identical read queries first before triggering the actual delete
• Query validation messages reference color output even if colors are not enabled
• Prisma generates unnecessary subquery, which is inefficient
• Unnecessary INNER JOIN when doing nested queries
• Semver checks for yarn and typescript could potentially fail
• Prisma overrides type caching when in PGBouncer mode, causing 9,000 enum queries per second on a production system
• deleteMany generates double WHERE filter
• Prisma generate command crashes with RustPanic: RuntimeError: panicked at 'internal error: entered unreachable code', query-engine/prisma-models/src/field/scalar.rs:93:50
• Duplicated keys in metrics properties
• Prisma Client extension with method override and jest-mock-extended or vitest-mock-extended expects never input

Language tools (e.g. VS Code)

• Auto-completion suggests attributes already present
• Quick Fix: when @@schema is defined in a block without the schemas attribute

Prisma Engines

• CockroachDB: get_columns can hit inefficiency inside pg_class

Credits

Huge thanks to @onichandame, @fqazi, @KhooHaoYit, @alencardc, @Oreilles, @christianledgard, @skyzh, @alula, @michaelpoellath, @RobertCraigie, @icanipa, @jiashengguo, @stephenwade, @darthmaim, @ludralph, @Gerschtli, @andyjy for helping!

💼 We're hiring!

If you're interested in joining our growing team to help empower developers to build data-intensive applications, Prisma is the place for you.

We're currently hiring for the following roles: - Software Engineer - Senior Software Engineer (Rust) - Engineering Manager: Prisma Data Platform

Feel free to read the job descriptions and apply using the links provided.