5130 search results - page 251 / 1026 » Constraint Query Languages |
156
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POPL
1999
ACM
15 years 10 months ago
1999
ACM
Superfluous variables are often produced as the byproducts of program transformations, compilation, and poorly written code. These variables are irrelevant to the computational o...
165
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SIGMOD
2004
ACM
16 years 6 months ago
2004
ACM
A rich set of concepts and techniques has been developed in the context of query processing for the efficient and robust execution of queries. So far, this work has mostly focused...
172
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MFCS
2009
Springer
16 years 1 months ago
2009
Springer
We study visibly pushdown automata (VPA) models for expressing and evaluating queries, expressed using MSO formulas, on words with a nesting structure (like XML documents). We deï...
149
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DOOD
1995
Springer
15 years 10 months ago
1995
Springer
Wrappers provide access to heterogeneous information sources by converting application queries into source speci c queries or commands. In this paper we present a wrapper implemen...
154
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ISCI
2008
15 years 6 months ago
2008
This paper considers the theory of database queries on the complex value data model with external functions. Motivated by concerns regarding query evaluation, we first identify re...