620 search results - page 15 / 124 » Algorithms for Rewriting Aggregate Queries Using Views |
104
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ECEASST
2010
15 years 2 months ago
2010
This short paper explores the potential of embedding-based graph rewriting as a tool for understanding natural computing, and in particular self-assembly. The basic point of view i...
134
Voted
SIS
2007
15 years 6 months ago
2007
Access control models for XML data can be classified in two major categories: node filtering and query rewriting systems. The first category includes approaches that use access ...
161
Voted
CSFW
2003
IEEE
15 years 10 months ago
2003
IEEE
SPKI/SDSI is a language for expressing distributed access control policy, derived from SPKI and SDSI. We provide a first-order logic (FOL) semantics for SDSI, and show that it ha...
134
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EDBT
2000
ACM
15 years 8 months ago
2000
ACM
OLAP applications use precomputation of aggregate data to improve query response time. While this problem has been well-studied in the recent database literature, to our knowledge ...
216
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ICDT
2009
ACM
16 years 5 months ago
2009
ACM
We study the problem of querying data sources that accept only a limited set of queries, such as sources accessible by Web services which can implement very large (potentially inf...