1. A computer-executed method comprising: resolving a resource path, identified in one or more queries, to a set of resources; storing a mapping between said resource path and said set of resources in association with a first query cursor for a particular query of the one or more queries; detecting a change in the resource path for one or more resources of the set of resources; and in response to detecting the change, marking the mapping as invalid; wherein the method is performed by one or more computing devices.