# For PostgreSQL
npx wrangler hyperdrive create my-postgres-db \
  --connection-string="postgres://user:password@db-host.cloud:5432/database"

# For MySQL
npx wrangler hyperdrive create my-mysql-db \
  --connection-string="mysql://user:password@db-host.cloud:3306/database"

# Output:
# ✅ Successfully created Hyperdrive configuration
#
# [[hyperdrive]]
# binding = "HYPERDRIVE"
# id = "a76a99bc-7901-48c9-9c15-c4b11b559606"

{
  "name": "my-worker",
  "main": "src/index.ts",
  "compatibility_date": "2024-09-23",
  "compatibility_flags": ["nodejs_compat"],  // REQUIRED for database drivers
  "hyperdrive": [
    {
      "binding": "HYPERDRIVE",                     // Available as env.HYPERDRIVE
      "id": "a76a99bc-7901-48c9-9c15-c4b11b559606"  // From wrangler hyperdrive create
    }
  ]
}

# For PostgreSQL (choose one)
npm install pg           # node-postgres (most common)
npm install postgres     # postgres.js (modern, minimum v3.4.5)

# For MySQL
npm install mysql2       # mysql2 (minimum v3.13.0)

import { Client } from "pg";

type Bindings = {
  HYPERDRIVE: Hyperdrive;
};

export default {
  async fetch(request: Request, env: Bindings, ctx: ExecutionContext) {
    const client = new Client({
      connectionString: env.HYPERDRIVE.connectionString
    });

    await client.connect();

    try {
      const result = await client.query('SELECT * FROM users LIMIT 10');
      return Response.json({ users: result.rows });
    } finally {
      // Clean up connection AFTER response is sent
      ctx.waitUntil(client.end());
    }
  }
};

import { createConnection } from "mysql2/promise";

export default {
  async fetch(request: Request, env: Bindings, ctx: ExecutionContext) {
    const connection = await createConnection({
      host: env.HYPERDRIVE.host,
      user: env.HYPERDRIVE.user,
      password: env.HYPERDRIVE.password,
      database: env.HYPERDRIVE.database,
      port: env.HYPERDRIVE.port,
      disableEval: true  // REQUIRED for Workers (eval() not supported)
    });

    try {
      const [rows] = await connection.query('SELECT * FROM users LIMIT 10');
      return Response.json({ users: rows });
    } finally {
      ctx.waitUntil(connection.end());
    }
  }
};

npx wrangler deploy

# PostgreSQL
postgres://user:password@host:5432/database
postgres://user:password@host:5432/database?sslmode=require

# MySQL
mysql://user:password@host:3306/database

# URL-encode special chars: p@ssw$rd → p%40ssw%24rd

const client = new Client({ connectionString: env.HYPERDRIVE.connectionString });
await client.connect();
const result = await client.query('SELECT ...');
ctx.waitUntil(client.end());  // CRITICAL: Non-blocking cleanup

const pool = new Pool({
  connectionString: env.HYPERDRIVE.connectionString,
  max: 5  // CRITICAL: Workers limit is 6 connections (July 2025: configurable ~20 Free, ~100 Paid)
});
const [result1, result2] = await Promise.all([
  pool.query('SELECT ...'),
  pool.query('SELECT ...')
]);
ctx.waitUntil(pool.end());

import { drizzle } from "drizzle-orm/postgres-js";
import postgres from "postgres";

const sql = postgres(env.HYPERDRIVE.connectionString, { max: 5 });
const db = drizzle(sql);
const allUsers = await db.select().from(users);
ctx.waitUntil(sql.end());

import { PrismaPg } from "@prisma/adapter-pg";
import { PrismaClient } from "@prisma/client";
import { Pool } from "pg";

const pool = new Pool({ connectionString: env.HYPERDRIVE.connectionString, max: 5 });
const adapter = new PrismaPg(pool);
const prisma = new PrismaClient({ adapter });
const users = await prisma.user.findMany();
ctx.waitUntil(pool.end());

export CLOUDFLARE_HYPERDRIVE_LOCAL_CONNECTION_STRING_HYPERDRIVE="postgres://user:password@localhost:5432/local_db"
npx wrangler dev

{ "hyperdrive": [{ "binding": "HYPERDRIVE", "id": "prod-id", "localConnectionString": "postgres://..." }] }

npx wrangler dev --remote  # ⚠️ Uses PRODUCTION database

const sql = postgres(env.HYPERDRIVE.connectionString, {
  prepare: true  // REQUIRED for caching
});

response.headers.get('cf-cache-status');  // HIT, MISS, BYPASS, EXPIRED

npx wrangler cert upload certificate-authority --ca-cert root-ca.pem --name my-ca-cert
npx wrangler hyperdrive create my-db --connection-string="postgres://..." --ca-certificate-id <ID> --sslmode verify-full

npx wrangler cert upload mtls-certificate --cert client-cert.pem --key client-key.pem --name my-cert
npx wrangler hyperdrive create my-db --connection-string="postgres://..." --mtls-certificate-id <ID>

# 1. Install cloudflared (macOS: brew install cloudflare/cloudflare/cloudflared)
# 2. Create tunnel
cloudflared tunnel create my-db-tunnel

# 3. Configure config.yml
# tunnel: <TUNNEL_ID>
# ingress:
#   - hostname: db.example.com
#     service: tcp://localhost:5432

# 4. Run tunnel
cloudflared tunnel run my-db-tunnel

# 5. Create Hyperdrive
npx wrangler hyperdrive create my-private-db --connection-string="postgres://user:password@db.example.com:5432/database"

# Create Hyperdrive configuration
wrangler hyperdrive create <name> --connection-string="postgres://..."

# List all Hyperdrive configurations
wrangler hyperdrive list

# Get details of a configuration
wrangler hyperdrive get <hyperdrive-id>

# Update connection string
wrangler hyperdrive update <hyperdrive-id> --connection-string="postgres://..."

# Delete configuration
wrangler hyperdrive delete <hyperdrive-id>

# Upload CA certificate
wrangler cert upload certificate-authority --ca-cert <file>.pem --name <name>

# Upload client certificate pair
wrangler cert upload mtls-certificate --cert <cert>.pem --key <key>.pem --name <name>

# Option 1: Create new config (zero downtime)
wrangler hyperdrive create my-db-v2 --connection-string="postgres://new-creds..."
# Update wrangler.jsonc, deploy, delete old config

# Option 2: Update existing
wrangler hyperdrive update <id> --connection-string="postgres://new-creds..."