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AIPS
2006
13 years 9 months ago
Optimal STRIPS Planning by Maximum Satisfiability and Accumulative Learning
Planning as satisfiability (SAT-Plan) is one of the best approaches to optimal planning, which has been shown effective on problems in many different domains. However, the potenti...
Zhao Xing, Yixin Chen, Weixiong Zhang
VLDB
2004
ACM
118views Database» more  VLDB 2004»
14 years 1 months ago
Green Query Optimization: Taming Query Optimization Overheads through Plan Recycling
PLASTIC [1] is a recently-proposed tool to help query optimizers significantly amortize optimization overheads through a technique of plan recycling. The tool groups similar quer...
Parag Sarda, Jayant R. Haritsa
BNCOD
2006
55views Database» more  BNCOD 2006»
13 years 9 months ago
On the Optimal Ordering of Maps, Selections, and Joins Under Factorization
We examine the problem of producing the optimal evaluation order for queries containing joins, selections, and maps. Specifically, we look at the case where common subexpressions i...
Thomas Neumann, Sven Helmer, Guido Moerkotte
PODS
2004
ACM
100views Database» more  PODS 2004»
14 years 7 months ago
Weighted Hypertree Decompositions and Optimal Query Plans
Francesco Scarcello, Gianluigi Greco, Nicola Leone
AIPS
2007
13 years 10 months ago
Structural Patterns of Tractable Sequentially-Optimal Planning
We study the complexity of sequentially-optimal classical planning, and discover new problem classes for whose such optimization is tractable. The results are based on exploiting ...
Michael Katz, Carmel Domshlak