January 2026 monthly summary for GoogleCloudPlatform/pgadapter. Focused on enabling experimental Spanner host support and validating new connection settings in PGAdapter, with config updates to support testing and evaluation. This work improves early-stage integration with Spanner and informs broader adoption.

Monthly summary for 2025-09 highlighting key feature delivery of experimental Spanner hosts across two repositories, enabling testing with non-production Spanner instances and more robust test configurations. Delivered improved test harness and environment management to support experimental capabilities while preserving production stability.

Month: 2025-05 highlights: Implemented experimental host support for Spanner across two major repos, enabling multiplexed sessions and experimental host usage to optimize connection pooling in experimental environments. Go client gains a new IsExperimentalHost configuration option to tune session management, while Java Spanner pool updates introduce an isExperimentalHost flag and builder changes to support pgAdapter's experimental host functionality. This work enables faster iteration, safer testing, and lays the groundwork for performance benchmarking in experimental setups.

March 2025 performance highlights: Delivered key platform improvements in Spanner-related Java clients, expanding compatibility and experimental capabilities. Implemented multiplexed sessions for experimental Spanner hosts with a configurable session pool and default multiplexing, enabling more scalable connections. Extended JDBC driver compatibility to support both 'jdbc:cloudspanner' and 'jdbc:spanner' URL prefixes, updating connection logic and unit tests. These changes improve reliability for experimental deployments, reduce configuration friction, and broaden integration options for Java-based Spanner clients.

February 2025 monthly summary focusing on configuration defaults and connectivity enhancements for external Spanner usage across two repositories. Delivered default configuration for external hosts, enhanced authentication flow, and flexible JDBC URL handling, along with tests and refactors to improve maintainability and reliability. This work reduces setup friction, improves connect-time reliability, and strengthens security posture through env-var based credentials.

January 2025: Security hardening and external-host connectivity enhancements across Spanner clients. Delivered cross-repo mTLS capabilities and external-host JDBC support, with focused testing and build updates to enable secure deployments and scalable integration.

December 2024: Implemented External Cloud Spanner JDBC support for external host connections in renovate-bot/java-spanner. This update extends ConnectionOptions with external-host URI regex validation and default-port handling, accompanied by unit tests to verify the new functionality. The change broadens connectivity options for customers using external Spanner endpoints, reducing configuration errors and enabling more flexible deployment patterns across environments.