Add FindConfig, ParseURIConfig, and GetConfigFiles as exported functions
to allow callers to retrieve database configuration info without
establishing a connection. Useful for version/startup info display.
Add support for PostgreSQL connection URIs via DATABASE_URI env var.
When set, it takes precedence over config files and PoolOptions are
ignored (pool settings can be specified in URI query string).
Add PostgreSQL support to database package alongside existing MySQL support.
Both databases share common infrastructure (pool management, metrics,
transactions) while using database-specific connectors.
database/ changes:
- Add PostgresConfig struct and PostgreSQL connector using pgx/stdlib
- Change MySQL config from DBConfig to *MySQLConfig (pointer)
- Add Config.Validate() to prevent multiple database configs
- Add PostgreSQL connector with secure config building (no password in DSN)
- Add field validation and secure defaults (SSLMode="prefer")
- Support legacy flat PostgreSQL config format for backward compatibility
- Add tests for PostgreSQL configs and validation
New database/pgdb/ package:
- Native pgx connection pool support (*pgxpool.Pool)
- OpenPool() and OpenPoolWithConfigFile() APIs
- CreatePoolConfig() for secure config conversion
- PoolOptions for fine-grained pool control
- Full test coverage and documentation
Security:
- Passwords never exposed in DSN strings
- Set passwords separately in pgx config objects
- Validate all configuration before connection
Architecture:
- Shared code in database/ for both MySQL and PostgreSQL (sql.DB)
- database/pgdb/ for PostgreSQL-specific native pool support
Allow overriding default database.yaml paths via DATABASE_CONFIG_FILE
environment variable. When set, uses single specified file instead of
default ["database.yaml", "/vault/secrets/database.yaml"] search paths.
Maintains backward compatibility when env var not set.
Extract common database functionality from api/ntpdb and monitor/ntpdb
into shared common/database package:
- Dynamic connector pattern with configuration loading
- Configurable connection pool management (API: 25/10, Monitor: 10/5)
- Optional Prometheus metrics integration
- Generic transaction helpers with proper error handling
- Unified interfaces compatible with SQLC-generated code
Foundation for migration to eliminate ~200 lines of duplicate code.
