Custom SQL functions can now be directly queried in the GraphQL API with PostgreSQL, enhancing the ability to execute complex business logic at the database level rather than on individual clients or through multiple queries. This feature supports only certain types of PostgreSQL functions—those with behaviors marked as STABLE or IMMUTABLE, returning SETOF a table, and using IN argument modes. Access control permissions for the SETOF table apply to the function itself, maintaining security. Examples include a text-search function for an article database, and a PostGIS-based function for finding nearby landmarks to a user, which can be integrated into GraphQL queries. These functions allow for aggregations and various query arguments such as where, limit, and order_by. Future iterations promise expanded function support and integration with mutations. Feedback is encouraged via community channels.