Fauna FQL v4 End-of-Life

Hello everyone,

Since launching FQL v10 almost a year ago, customers who moved their production workloads to FQL v10 have given us overwhelmingly positive feedback on it. They have found FQL v10 easier to use, easier to maintain, and more powerful than previous versions of FQL.

As a result of this feedback, we are announcing the end-of-life of version 4 of the Fauna Query Language. FQL v4 will be decommissioned on June 30th, 2025. If you’re currently using FQL v4, you will need to migrate your queries to FQL v10 by that date.

How do I migrate?

The transition from FQL v4 to FQL v10 can be done incrementally and requires no changes to your underlying data. We’ve provided a v4 to v10 Migration Guide and an FAQ to give you more details on this transition. We also highly recommend reading the FQL Language and API Guide to familiarize yourself with FQL v10 and its capabilities. These features include a new typescript-inspired syntax, new lightweight drivers, collection-oriented indexes, improved error responses, static typing, and soon Fauna Schema.