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http://hdl.handle.net/1942/16405
Title: | Querying an integrated complex-object dataflow database | Authors: | KWASNIKOWSKA, Natalia VAN DEN BUSSCHE, Jan |
Issue Date: | 2013 | Publisher: | Springer | Source: | In Search of Elegance in the Theory and Practice of Computation: Essays Dedicated to Peter Buneman , p. 400-417 | Series/Report: | Lecture Notes in Computer Science | Series/Report no.: | 8000 | Abstract: | We consider an integrated complex-object dataflow database in which multiple dataflow specifications can be stored, together with multiple executions of these dataflows, including the complex-object data that are involved, and annotations. We focus on dataflow applications frequently encountered in the scientific community, involving the manipulation of data with a complex-object structure combined with service calls, which can be either internal or external. Internal services are dataflows acting as a subprogram of an other dataflow, whereas external services are modeled as functions with a possibly non-deterministic behavior. Dataflow specifications are expressed in a high-level programming language based on the nested relational calculus, the operators of which provide the right “glue” needed to combine different service calls into a complex-object dataflow. All entities involved, whether complex-objects, dataflow executions or dataflow specifications, are first-class citizens of the integrated database: they are all data. We discuss how such dataflow repositories can be queried in a variety of ways, including provenance queries. We show that a modern SQL platform with support for (external) routines and SQL/XML suffices to support all types of dataflow repository queries. | Document URI: | http://hdl.handle.net/1942/16405 | Link to publication/dataset: | http://alpha.uhasselt.be/~lucp1080/pbf10.pdf | ISBN: | 978-3-642-41659-0 | DOI: | 10.1007/978-3-642-41660-6_21 | Rights: | Springer-Verlag Berlin Heidelberg | Category: | A1 | Type: | Book Section |
Appears in Collections: | Research publications |
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pbf10.pdf | Peer-reviewed author version | 590.23 kB | Adobe PDF | View/Open |
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