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The Relational XQuery Puzzle: A Look-Back at the Pieces Found So Far

Publication Details

Title

The Relational XQuery Puzzle: A Look-Back at the Pieces Found So Far

Authors

Jens Teubner

Published

Computer Science—Research and Development, vol. 24, no 1-2, Springer Verlag, September 2009.

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Abstract

Given the tremendous versatility of relational database implementations toward a wide range of database problems, it seems only natural to consider them as back-ends for XML data processing. Yet, the assumptions behind the language XQuery are considerably different to those in traditional RDBMSs. The underlying data model is a tree, data and results carry an intrinsic order, queries are described using explicit iteration and, after all, problems are everything else but regular.

Solving the relational XQuery puzzle, therefore, has challenged a number of research groups over the past years. The purpose of this article is to summarize and assess some of the results that have been obtained during this period to solve the puzzle. Our main focus is on the Pathfinder XQuery compiler, a full reference implementation of a purely relational XQuery processor. As we dissect its components, we relate them to other work in the field and also point to open problems and limitations in the context of relational XQuery processing.

Publication Log

January 2009

camera-ready

November 2008

submission to Computer Science—Research and Development (accepted)



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Kontakt

Prof. Dr. Jens Teubner
Tel.: 0231 755-6481