}

	s.mu.Lock()
	for _, v := range s.css {
		if v.dc == dc {
			s.mu.Unlock()
			return dc, dc.releaseConn, v.ds, nil
		}
	}
	s.mu.Unlock()

	// No luck; we need to prepare the statement on this connection
	withLock(dc, func() {
		ds, err = s.prepareOnConnLocked(ctx, dc)
	})
	if err != nil {
		dc.releaseConn(err)
		return nil, nil, nil, err
	}