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Sven Helmer

Papers on DiSC'04


Nested Queries and Quantifiers in an Ordered Context

Evaluating Lockbased Protocols for Cooperation on XML Documents

XQuery Processing in Natix with an Emphasis on Join Ordering

Publications


Note: Links lead to the DBLP on the Web.

Sven Helmer

Thomas Neumann , Sven Helmer, Guido Moerkotte : On the Optimal Ordering of Maps and Selections under Factorization. ICDE 2005 : 490-501

Matthias Brantner , Sven Helmer, Carl-Christian Kanne , Guido Moerkotte : Full-fledged Algebraic XPath Processing in Natix. ICDE 2005 : 705-716

Sven Helmer, Carl-Christian Kanne , Guido Moerkotte : Timestamp-Based Protocols for Synchronizing Access on XML Documents. DEXA 2004 : 591-600

Vasco Amaral , Sven Helmer, Guido Moerkotte : PHEASANT: A PHysicist's EAsy ANalysis Tool. FQAS 2004 : 229-242

Norman May , Sven Helmer, Guido Moerkotte : Nested Queries and Quantifiers in an Ordered Context. ICDE 2004 : 239-250

Norman May , Sven Helmer, Carl-Christian Kanne , Guido Moerkotte : XQuery Processing in Natix with an Emphasis on Join Ordering. XIME-P 2004 : 49-54

Sven Helmer, Carl-Christian Kanne , Guido Moerkotte : Evaluating lock-based protocols for cooperation on XML documents. SIGMOD Record 33 (1): 58-63 (2004)

Sven Helmer, Carl-Christian Kanne , Guido Moerkotte : Lock-based Protocols for Cooperation on XML Documents. DEXA Workshops 2003 : 230-234

Sven Helmer, Thomas Neumann , Guido Moerkotte : A Robust Scheme for Multilevel Extendible Hashing. ISCIS 2003 : 220-227

Sven Helmer, Thomas Neumann , Guido Moerkotte : Estimating the Output Cardinality of Partial Preaggregation with a Measure of Clusteredness. VLDB 2003 : 656-667

Norman May , Sven Helmer, Guido Moerkotte : Quantifiers in XQuery. WISE 2003 : 313-316

Norman May , Sven Helmer, Guido Moerkotte : Three Cases for Query Decorrelation in XQuery. Xsym 2003 : 70-84

Sven Helmer, Guido Moerkotte : Indexstrukturen für XML. Web & Datenbanken 2003 : 217-250

Sven Helmer: Evaluating different approaches for indexing fuzzy sets. Fuzzy Sets and Systems 140 (1): 167-182 (2003)

Sven Helmer: Book Review: "Recent issues on fuzzy databases" by G. Bordogna and G. Pasi (Eds.); Physica Verlag, Wurzburg, 2000, 236pp., ISBN: 3-7908-1319-2. Fuzzy Sets and Systems 140 (1): 229-230 (2003)

Sven Helmer, Guido Moerkotte : A performance study of four index structures for set-valued attributes of low cardinality. VLDB J. 12 (3): 244-261 (2003)

Sven Helmer, Carl-Christian Kanne , Guido Moerkotte : XML-Datenbanksysteme und ihre Anwendung. it - Information Technology 45 (3): 137-142 (2003)

Sven Helmer, Carl-Christian Kanne , Guido Moerkotte : Optimized Translation of XPath into Algebraic Expressions Parameterized by Programs Containing Navigational Primitives. WISE 2002 : 215-224

Thorsten Fiebig , Sven Helmer, Carl-Christian Kanne , Guido Moerkotte , Julia Neumann , Robert Schiele , Till Westmann : Natix: A Technology Overview. Web, Web-Services, and Database Systems 2002 : 12-33

Thorsten Fiebig , Sven Helmer, Carl-Christian Kanne , Guido Moerkotte , Julia Neumann , Robert Schiele , Till Westmann : Anatomy of a native XML base management system. VLDB J. 11 (4): 292-314 (2002)

Till Westmann , Donald Kossmann , Sven Helmer, Guido Moerkotte : The Implementation and Performance of Compressed Databases. SIGMOD Record 29 (3): 55-67 (2000)

Sven Helmer, Till Westmann , Guido Moerkotte : Diag-Join: An Opportunistic Join Algorithm for 1:N Relationships. VLDB 1998 : 98-109

Sven Helmer, Guido Moerkotte : Evaluation of Main Memory Join Algorithms for Joins with Set Comparison Join Predicates. VLDB 1997 : 386-395

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