CloseDB closes the underlying sql.DB from a gorm.DB.

IsUniqueViolationError reports whether err is (or wraps at any level) a pgconn.PgError with SQLSTATE corresponding to Postgres "unique_violation" (error code "23505").

NewGORMLogger returns a new logger for GORM.

OpenDB initializes a database session, connecting to the specific database from configuration.

OpenDBWithoutDBName initializes a database session ignoring config.DB.DBName.