How to Migrate from Fauna to Postgres

How to fix it

Try these in order — the most common fix is first.

1. 1. Import raw JSON into jsonb

   Copy steps
   1. Create a table per collection with an id and a jsonb data column
   2. Bulk-load the exported files with COPY or an import script
   3. Verify row counts
   Did this fix it? Yes No

2. 2. Normalize and rewrite queries

   Copy steps
   1. Move frequently queried fields into real columns and add indexes
   2. Turn Fauna document references into foreign keys
   3. Rewrite each FQL query as SQL and test against the imported data
   Did this fix it? Yes No

Symptoms

You have Fauna JSON exports and need them in a SQL database.

Why it happens

• Document model differs from relational tables
• FQL queries and indexes have no direct SQL match
• References between documents must become foreign keys

This guide also covers

• migrate from fauna to postgres
• fauna to supabase
• fauna to neon
• fauna alternative sql

Other Fauna errors

• Is Fauna Shutting Down? What Happened and What to Do
• How to Export Your Data from Fauna (Before and After Shutdown)
• How to Migrate from Fauna to MongoDB
• Fauna Not Working: Connection Refused or Request Failed
• Is Fauna Open Source? Can You Self-Host It?
• Fauna Billing After Shutdown: Charges, Refunds and Cancel
• Converting FQL Queries to SQL After Fauna
• Fauna GraphQL and REST API Not Responding After Shutdown