Migrating and Upgrading Projects

Supabase ships fast and we endeavor to add all new features to existing projects wherever possible. In some cases, access to new features require upgrading or migrating your Supabase project.

Upgrade your project#

There are a few methods available to upgrade your project.

pg_upgrade#

pg_upgrade performs an in-place upgrade on your database. For projects larger than 1GB, pg_upgrade is generally faster than a pause+restore cycle, and the speed advantage grows with the size of the database.

1. Plan for an appropriate downtime window, and ensure you have reviewed the caveats section of this document before executing the upgrade.
2. Use the "Upgrade project" button on the Infrastructure section of your dashboard.

Additionally, if a pg_upgrade upgrade should fail, your original DB would be brought back up online and be able to service requests.

As a rough rule of thumb, pg_upgrade operates at ~100mbps (when executing an upgrade on your data). Using the size of your database, you can use this metric to derive an approximate sense of the downtime window necessary for the upgrade. During this window, you should plan for your DB and associated services to be unavailable.

Pause + restore#

When you pause and restore a project, the restored database includes the latest features. This method does include downtime, so be aware that your project will be inaccessible for a short period of time.

1. On the General Settings page in the Dashboard, click Pause project. You will be redirected to the home screen as your project is pausing. This process can take several minutes.
2. After your project is paused, click Restore project. The restoration can take several minutes depending on how much data your database has. You will receive an email once the restoration is complete.

Note that a pause + restore upgrade involves tearing down your project's resources before bringing them back up again. If the restore process should fail, manual intervention from Supabase support will be required to bring your project back online.

Caveats#

Regardless of the upgrade method, a few caveats apply:

Logical replication#

If you are using logical replication, the replication slots will not be preserved by the upgrade process. You will need to manually recreate them after the upgrade with the method pg_create_logical_replication_slot. Refer to the Postgres docs on Replication Management Functions for more details about the method.

Breaking changes#

Newer versions of services can break functionality or change the performance characteristics you rely on. If your project is eligible for an upgrade, you will be able to find your current service versions from within the Supabase dashboard.

Breaking changes are generally only present in major version upgrades of Postgres and PostgREST. You can find their respective release notes at:

• Postgres
• PostgREST

If you are upgrading from a significantly older version, you will need to consider the release notes for any intermediary releases as well.

Disk sizing#

When upgrading, the Supabase platform will "right-size" your disk based on the current size of the database. For example, if your database is 100GB in size, and you have a 200GB disk, the upgrade will reduce the disk size to 120GB (1.2x the size of your database).

Objects dependent on Postgres extensions#

pg_upgrade does not support upgrading of databases containing reg* data types referencing system OIDs. If you have created any objects that depend on the following extensions, you will need to recreate them after the upgrade.

Extensions registering system OID-specific reg* data types:

• plv8
• plcoffee
• plls

As these extensions offer support to create functions in different languages, you will only need to check for functions using the languages enabled by the above extensions. Any objects depending on the detected objects (e.g. triggers, views, tables, etc.) will need to be modified to exclude references to them.

The following query returns the function name and their definitions, to help in recreating them post-upgrade.

Authentication method changes - deprecating md5 in favor of scram-sha-256#

The md5 hashing method has known weaknesses that make it unsuitable for cryptography. As such, we are deprecating md5 in favor of scram-sha-256, which is the default and most secure authentication method used in the latest Postgres versions.

We automatically migrate Supabase-managed roles' passwords to scram-sha-256 during the upgrade process, but you will need to manually migrate the passwords of any custom roles you have created, else you won't be able to connect using them after the upgrade.

To identify roles using the md5 hashing method and migrate their passwords, you can use the following SQL statements after the upgrade:

Database size reduction#

As part of the upgrade process, maintenance operations such as vacuuming are also executed. This can result in a reduction in the reported database size.

Post-upgrade validation#

Supabase performs extensive pre- and post-upgrade validations to ensure that the database has been correctly upgraded. However, you should plan for your own application-level validations, as there might be changes you might not have anticipated, and this should be budgeted for when planning your downtime window.

Migrate your project#

Migrating projects can be achieved using the Supabase CLI. This is particularly useful for older projects (e.g. to use a newer Postgres version).

Before you begin#

• Install Postgres so you can run psql and pg_dump.
• Install Supabase CLI.
• Create a new Supabase project.
• Install Docker Desktop for your platform.
• Set environment variables for the old project's database URL as $OLD_DB_URL and the new project's as $NEW_DB_URL. To find the database URL for a project, go to the project's dashboard page Project Settings/Database and look at Connection string / URI. For example, to set the $OLD_DB_URL you would run export OLD_DB_URL=postgresql://postgres:[YOUR-PASSWORD]@db.[YOUR-PROJECT-REF#].supabase.co:5432/postgres.

Backup your old database#

1. Run the following command from your terminal:

Restore to your new project#

In your new project:

1. Enable Database Webhooks if you enabled them in your old project.
2. Enable any extensions that were enabled in your old project.

If you use column encryption, first copy the root encryption key to your new project using your Personal Access Token.

Then run the following command from your terminal:

Setting the session_replication_role to replica disables all triggers so that columns are not double encrypted.

Troubleshooting notes:

• If you have created any custom roles with login attribute, you have to manually set their passwords in the new project.
• If you run into any permission errors related to supabase_admin during restore, edit the schema.sql file and comment out any lines containing ALTER ... OWNER TO "supabase_admin".

Schema changes to auth and storage#

If you have modified the auth and storage schemas in your old project, such as adding triggers or RLS policies, you have to restore them separately. The Supabase CLI can help you diff the changes to these schemas using the following commands.

Enable publication on tables#

Replication for Realtime is disabled for all tables in your new project. On the Replication page in the Dashboard, select your new project and enable replication for tables that were enabled in your old project.

Migrate storage objects#

The new project has the old project's Storage buckets, but the Storage objects need to be migrated manually. Use this script to move storage objects from one project to another.

Transfer to a different organization#

Note that project migration is for transferring your projects to different regions. If you need to move your project to a different organization without touching the infrastructure, see project transfers.