SYSTEM AND METHOD FOR FACILITATING ASYNCHRONOUS DISCONNECTED OPERATIONS FOR DATA ACCESS OVER A NETWORK

摘要

A system and method for facilitating asynchronous disconnected operations for data access over a network are described. In one preferred embodiment, a query in a database language is received from a user in a network. The query is converted into a plurality of network messages, each network message containing a fragment of the query. The network messages are transmitted through a network of a plurality of dynamic query routing nodes toward a plurality of data sources that are relevant to the query. When the network message reaches a leaf router with a corresponding relevant data source, a determination is made whether each data source of a plurality of disparate data sources is either in a connected or disconnected state, each data source storing data related to the query fragment within each network message. The query is further stored for a predetermined period of time at the leaf router until each data source has entered a connected state to the corresponding router within the network or until the specified lifetime limit for the query.. Upon the data source entering a connected state, the leaf router will forward the query fragment network message to that particular data source. The data source will then process the query for the specified times and return the results to the user. If the data source returns again to a disconnected state, then the data source will store the query and any query result sets until it returns to a connected state or until the specified lifetime limit for the query.