NDLI: Compiling query constraints (extended abstract)

Content Provider	ACM Digital Library
Author	Sudarshan, S. Stuckey, Peter J.
Abstract	We present a general technique to push query constraints (such as length≤1000) into database views and (constraint) logic programs. We introduce the notion of parametrized constraints, which help us push constraints with argument values that are known only at run time, and develop techniques for pushing parametrized constraints into predicate/view definitions. Our technique provides a way of compiling programs with constraint queries into programs with parametrized constraints compiled in, and which can be executed on systems, such as database query evaluation systems, that do not handle full constraint solving. Thereby our technique can push constraint selections that earlier constraint query rewriting techniques could not. Our technique is independent of the actual constraint domain, and we illustrate its use with equality constraints on structures (which are useful in object-oriented query languages) and linear arithmetic constraints.
Starting Page	56
Ending Page	67
Page Count	12
File Format	PDF
ISBN	0897916425
DOI	10.1145/182591.182598
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	1994-05-24
Publisher Place	New York
Access Restriction	Subscribed
Content Type	Text
Resource Type	Article

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Compiling query constraints (extended abstract)