Data Connect Queries: From Definitions to Client Code

Firebase Data Connect, now renamed SQL Connect, uses GraphQL queries to retrieve schema-defined backend data for applications, with queries written for client use after deployment or run ad hoc from privileged tools such as the Firebase console, VS Code extension, and Admin SDK. A query includes an operation name, typed arguments, optional directives, source tables, filters, ordering, and selected return fields; directives include required client-access authentication policies through @auth, result validation through @check, and response omission through @redact. Local tooling automatically generates single-table fields for retrieving individual records or filtered lists, as well as relational fields for multi-table operations, and these can be explored through the VS Code extension, generated files, local documentation, and the Firebase console. Developers use generated fields to define controlled application queries that expose only selected fields, preventing clients from directly accessing database data or secret fields, while automatically generated SDKs translate deployed GraphQL queries into functions for application platforms.

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