US Patent 7596550 System and method for query planning and execution

A coordination planner is suitably used for a query framework system for processing a user request for data from one or more data sources. The query framework system comprises multiple query processing components including a set of query operation providers, each being capable of providing a specific query operation. The coordination planner prepares a user request for execution by translating a logical representation of the user request into a physical representation of the user request using the query operation providers, and executes the physical representation of the user request to obtain a result data stream using the query operation providers.