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TKDE
2012
487views Formal Methods» more  TKDE 2012»
13 years 4 months ago
Query Planning for Continuous Aggregation Queries over a Network of Data Aggregators
—Continuous queries are used to monitor changes to time varying data and to provide results useful for online decision making. Typically a user desires to obtain the value of som...
Rajeev Gupta, Krithi Ramamritham
WWW
2007
ACM
16 years 2 months ago
Optimized query planning of continuous aggregation queries in dynamic data dissemination networks
Continuous queries are used to monitor changes to time varying data and to provide results useful for online decision making. Typically a user desires to obtain the value of some ...
Rajeev Gupta, Krithi Ramamritham
CORR
2008
Springer
158views Education» more  CORR 2008»
15 years 1 months ago
Declarative Combinatorics: Isomorphisms, Hylomorphisms and Hereditarily Finite Data Types in Haskell
This paper is an exploration in a functional programming framework of isomorphisms between elementary data types (natural numbers, sets, finite functions, permutations binary deci...
Paul Tarau
PODS
1994
ACM
91views Database» more  PODS 1994»
15 years 5 months ago
A Polymorphic Calculus for Views and Object Sharing
We present a typed polymorphic calculus that supports a general mechanism for view definition and object sharing among classes. In this calculus, a class can contain inclusion spe...
Atsushi Ohori, Keishi Tajima
ICFP
2007
ACM
15 years 5 months ago
iTasks: executable specifications of interactive work flow systems for the web
In this paper we introduce the iTask system: a set of combinators to specify work flows in a pure functional language at a very high level of abstraction. Work flow systems are au...
Rinus Plasmeijer, Peter Achten, Pieter W. M. Koopm...