NewConnectionPool creates a new ConnectionPool.

NewDBConnection returns a new DBConnection based on the ConnParams and will use the provided stats to collect timing.

ErrConnPoolClosed is returned if the connection pool is closed.

ConnectionPool re-exposes ResourcePool as a pool of PooledDBConnection objects.

DBConnection re-exposes mysql.Conn with some wrapping to implement most of PoolConnection interface, except Recycle.

PooledDBConnection re-exposes DBConnection to be used by ConnectionPool.