Fix for Prisma connection stuck.

When working with Prisma and Supabase DB, I got an issue with the Prisma CLI getting stuck during prisma db push and prisma db pull. I eventually for to know that the issue often arises when using a Supabase connection string with the pooled connection (port 6543).

For example, running npx prisma db push took 9 minutes here and still failed:

The Fix

To resolve this, I needed to switch to a direct connection string using port 5432 instead. I tried changing it on the Supabase dashboard and then saw this:

What you need to change:

# Old Pooled Connection
DATABASE_URL="postgresql://...@db.supabase.co:6543/db"
DIRECT_URL="postgresql://...@db.supabase.co:6543/db"

# New Direct Connection
DATABASE_URL="postgresql://...@db.supabase.co:6543/db"
DIRECT_URL="postgresql://...@db.supabase.co:5432/db"

// What your Prisma Datasource initialiser should look like
generator client {
  provider = "prisma-client-js"
}

datasource db {
  provider  = "db"
  url       = env("DATABASE_URL")
  directUrl = env("DIRECT_URL")
}

Now, let's see how it runs:

Happy Hacking!

PS: For more details, check out the GitHub discussion.