CockroachDB Setup

Configure Prisma ORM 7 with CockroachDB. For an existing Prisma 6 app, keep its configuration and use the Prisma 6 docs; the configuration and adapter examples below are for 7.

Prerequisites

CockroachDB cluster

1. Schema Configuration

In prisma/schema.prisma:

datasource db {
  provider = "cockroachdb"
}

generator client {
  provider = "prisma-client"
  output   = "../generated"
}

2. Config Configuration

In prisma.config.ts:

import 'dotenv/config'
import { defineConfig, env } from 'prisma/config'

export default defineConfig({
  schema: 'prisma/schema.prisma',
  datasource: {
    url: env('DATABASE_URL'),
  },
})

3. Environment Variable

In .env:

DATABASE_URL="postgresql://user:password@host:26257/db?sslmode=verify-full"

Note: CockroachDB uses the PostgreSQL wire protocol, so the URL often looks like postgresql, but the provider MUST be cockroachdb in the schema to handle specific CRDB features correctly.

Driver Adapter

Use a driver adapter for the standard SQL workflow. CockroachDB is PostgreSQL-compatible, so use the PostgreSQL adapter.

Install adapter and driver:
```
npm install @prisma/adapter-pg@7 pg
```

Instantiate Prisma Client with the adapter:

import 'dotenv/config'
import { PrismaClient } from '../generated/client'
import { PrismaPg } from '@prisma/adapter-pg'

const adapter = new PrismaPg({ connectionString: process.env.DATABASE_URL })
const prisma = new PrismaClient({ adapter })

ID Generation

CockroachDB uses BigInt or UUID for IDs efficiently.

model User {
  id BigInt @id @default(autoincrement()) // Uses unique_rowid()
}

Or using string UUIDs:

model User {
  id String @id @default(dbgenerated("gen_random_uuid()")) @db.Uuid
}

Common Issues

Schema Introspection

Always use provider = "cockroachdb" to ensure correct type mapping during db pull.

References

Prisma 7 CockroachDB documentation

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