PODS'04 - Query Execution and Optimization Weighted Hypertree Decompositions and Optimal Query Plans Francesco Scarcello Gianluigi Greco Nicola Leone Synopses for Query Optimization: A Space-Complexity Perspective Raghav Kaushik Raghu Ramakrishnan Venkatesan Chakaravarthy On the Memory Requirements of XPath Evaluation over XML Streams Ziv Bar-Yossef Marcus Fontoura Vanja Josifovski Conjunctive Queries over Trees Georg Gottlob Christoph Koch Klaus Schulz Return to PODS'04 Sessions ©2005 Association for Computing Machinery