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Title: Querying an integrated complex-object dataflow database
Authors: KWASNIKOWSKA, Natalia 
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.
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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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