Administration
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View Page History{include:fqp:Home} ----
h1. Overview
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The caGrid Federated Query Processor (FQP) Infrastructure provides a mechanism to perform basic distributed aggregations and joins of queries over multiple data services. As [caGrid data services|dataservices14:Home] all use a uniform query language, [CQL|dataservices:CQL], as well as a uniform grid interface, the Federated Query Infrastructure can be used to express queries over any combination of caGrid data services. Federated queries are expressed with a query language, [DCQL|fqp14:DCQL], which is an extension to CQL to express such concepts as joins against other data services, aggregations, and target data services.
!FQP.png|align=center!
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The caGrid Federated Query Processor (FQP) Infrastructure provides a mechanism to perform basic distributed aggregations and joins of queries over multiple data services. As [caGrid data services|dataservices14:Home] all use a uniform query language, [CQL|dataservices:CQL], as well as a uniform grid interface, the Federated Query Infrastructure can be used to express queries over any combination of caGrid data services. Federated queries are expressed with a query language, [DCQL|fqp14:DCQL], which is an extension to CQL to express such concepts as joins against other data services, aggregations, and target data services.
!FQP.png|align=center!