Skip to content
Cloudflare Docs

Prisma Postgres

Connect Hyperdrive to a Prisma Postgres database.

This example shows you how to connect Hyperdrive to a Prisma Postgres ↗ database.

1. Allow Hyperdrive access

You can connect Hyperdrive to any existing Prisma Postgres database by using your existing database connection string.

Prisma Data Platform

  1. Go to the Prisma Data Platform Console ↗ and select the project (database) you wish to connect to.
  2. Navigate to your database settings, select Connect to your database, select Any client, and copy the connection string for your Prisma Postgres database.
  3. You must append postgres as the database in your connection string. Ensure the connection string includes the necessary credentials according to the format documented below: 
    postgres://USERNAME:PASSWORD@HOSTNAME_OR_IP_ADDRESS:PORT/database_name

With the connection string, you can now create a Hyperdrive database configuration.

2. Create a database configuration

To configure Hyperdrive, you will need:

  • The IP address (or hostname) and port of your database.
  • The database username (for example, hyperdrive-demo) you configured in a previous step.
  • The password associated with that username.
  • The name of the database you want Hyperdrive to connect to. For example, postgres.

Hyperdrive accepts the combination of these parameters in the common connection string format used by database drivers:

postgres://USERNAME:PASSWORD@HOSTNAME_OR_IP_ADDRESS:PORT/database_name

Most database providers will provide a connection string you can directly copy-and-paste directly into Hyperdrive.

To create a Hyperdrive configuration with the Wrangler CLI, open your terminal and run the following command. Replace <NAME_OF_HYPERDRIVE_CONFIG> with a name for your Hyperdrive configuration and paste the connection string provided from your database host, or replace user, password, HOSTNAME_OR_IP_ADDRESS, port, and database_name placeholders with those specific to your database:

Terminal window
npx wrangler hyperdrive create <NAME_OF_HYPERDRIVE_CONFIG> --connection-string="postgres://user:password@HOSTNAME_OR_IP_ADDRESS:PORT/database_name"

This command outputs a binding for the Wrangler configuration file:

{
  "name": "hyperdrive-example",
  "main": "src/index.ts",
  "compatibility_date": "2024-08-21",
  "compatibility_flags": [
    "nodejs_compat"
  ],
  "hyperdrive": [
    {
      "binding": "HYPERDRIVE",
      "id": "<ID OF THE CREATED HYPERDRIVE CONFIGURATION>"
    }
  ]
}

3. Use Hyperdrive from your Worker

Install the node-postgres driver:

Terminal window
npm i pg@>8.16.3

If using TypeScript, install the types package:

Terminal window
npm i -D @types/pg

Add the required Node.js compatibility flags and Hyperdrive binding to your wrangler.jsonc file:

{
  "compatibility_flags": [
    "nodejs_compat"
  ],
  "compatibility_date": "2024-09-23",
  "hyperdrive": [
    {
      "binding": "HYPERDRIVE",
      "id": "<your-hyperdrive-id-here>"
    }
  ]
}

Create a new Client instance and pass the Hyperdrive connectionString:

// filepath: src/index.ts
import { Client } from "pg";


export default {
  async fetch(request: Request, env: Env, ctx: ExecutionContext): Promise<Response> {
    // Create a new client instance for each request.
    const client = new Client({
      connectionString: env.HYPERDRIVE.connectionString,
    });


    try {
      // Connect to the database
      await client.connect();
      console.log("Connected to PostgreSQL database");


      // Perform a simple query
      const result = await client.query("SELECT * FROM pg_tables");


      // Clean up the client after the response is returned, before the Worker is killed
      ctx.waitUntil(client.end());


      return Response.json({
        success: true,
        result: result.rows,
      });
    } catch (error: any) {
      console.error("Database error:", error.message);


      new Response('Internal error occurred', { status: 500 });
    }
  },
};

4. Configure Hyperdrive maximum connections

Prisma Postgres has limits on the amount of connections that can be made direct to the database using Hyperdrive. Refer to Prisma Postgres limits ↗ to know the specific limits that apply to your database.

  1. From the Cloudflare Hyperdrive dashboard ↗, select your newly created Hyperdrive configuration.
  2. Navigate to Settings.
  3. In Origin connection limit, select Edit Settings and set your max connections to a number that is less than your Prisma connection limit.

Next steps