Writing SQL in SQL Connect

Firebase Data Connect, now called SQL Connect, is a PostgreSQL solution for building Cloud SQL-backed applications through declarative GraphQL schemas and operations, and its new Native SQL feature allows developers to place predefined raw SQL statements in GraphQL operation files for advanced database use cases. Native SQL supports read queries and data-modification commands, including complex aggregations, window functions, Common Table Expressions, bulk updates, PostgreSQL extensions such as PostGIS, and custom return structures that are difficult to model in standard GraphQL. Security is maintained through deployment-time SQL validation, server-controlled query templates, parameter binding, blocked destructive commands, and trusted server-side context injection such as authenticated user IDs. The feature trades Data Connect’s automatically generated strict client types for flexible JSON-based results, requiring client-side validation and careful query-performance testing. For stable, read-only custom queries that still need typed GraphQL objects, the @view directive offers an alternative, while standard GraphQL operations remain recommended for routine CRUD, simple joins, and cases where built-in relation handling, authorization, and end-to-end type safety are most useful.

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