cache

type Cacher interface {
	// Get must return a pointer to the item, a boolean representing whether
	// item is present or not, and an error (must be nil when key is not
	// present).
	Get(ctx context.Context, key string) (*Item, bool, error)
	// Set sets the item into cache with the given TTL.
	Set(ctx context.Context, key string, item *Item, ttl time.Duration) error
}

type Item struct {
	Cols []string
	Rows [][]driver.Value
}