IsDuplicateError determines if an error is pq: duplicate key value violates unique constraint error.

IsNotFoundError determines if an error is sql.ErrNoRows.

NewLock returns a Lock with *sql.Conn.

NewUUID returns a new, properly instantiated UUID object.

Transaction is a wrapper function which helps to avoid the use of sql.DB instance directly.

Lock implements the Locker interface.

UUID can be used with the standard sql package to represent a UUID value that can be NULL in the database.