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SIGMOD
2003
ACM
129views Database» more  SIGMOD 2003»
14 years 7 months ago
Efficient Processing of Joins on Set-valued Attributes
Object-oriented and object-relational DBMS support setvalued attributes, which are a natural and concise way to model complex information. However, there has been limited research...
Nikos Mamoulis
IEEEARES
2008
IEEE
14 years 2 months ago
haplog: A Hash-Only and Privacy-Preserved Secure Logging Mechanism
A secure logging mechanism named haplog is proposed. In essence, haplog uses only one-way hash functions to achieve the security and functional requirements of logging. This makes...
Chih-Yin Lin
IFL
2003
Springer
128views Formal Methods» more  IFL 2003»
14 years 26 days ago
With-Loop Scalarization - Merging Nested Array Operations
Construction of complex array operations by composition of more basic ones allows for abstract and concise specifications of algorithms. Unfortunately, na¨ıve compilation of suc...
Clemens Grelck, Sven-Bodo Scholz, Kai Trojahner
PODS
1999
ACM
89views Database» more  PODS 1999»
13 years 12 months ago
Type Inference in the Polymorphic Relational Algebra
We give a polymorphic account of the relational algebra. We introduce a formalism of \type formulas" speci cally tuned for relational algebra expressions, and present an algo...
Jan Van den Bussche, Emmanuel Waller
CSL
2007
Springer
14 years 1 months ago
Qualitative Temporal and Spatial Reasoning Revisited
Abstract. Establishing local consistency is one of the main algorithmic techniques in temporal and spatial reasoning. In this area, one of the central questions for the various pro...
Manuel Bodirsky, Hubie Chen