Abstract
There has been growing interest in the addition of update operations to languages that operate on XML data, for example, XQuery and XJ. These update operations support efficient and declarative specification of transformations of XML data. The presence of update operations raises the question of detecting data dependencies between reads and updates of XML documents. The ability to optimize the execution of update operations depends on the ability to detect such conflicts. In this paper, we formalize the notions of updates on XML data and conflicts between update operations. We show that conflict detection is NP-complete when the update operations are specified using XPath expressions that support the use of the child and descendant axis, wildcard symbols, and branching. We also provide efficient polynomial algorithms for update conflict detection when the patterns do not use branching.
This is a preview of subscription content, log in via an institution to check access.
Preview
Unable to display preview. Download preview PDF.
Similar content being viewed by others
References
Balmin, A., Papakonstantinou, Y., Vianu, V.: Incremental validation of XML documents. ACM Transactions on Database Systems (TODS) 29(4), 710–751 (2004)
Benedikt, M., Bonifati, A., Flesca, S., Vyas, A.: Verification of tree updates for optimization. In: Etessami, K., Rajamani, S.K. (eds.) CAV 2005. LNCS, vol. 3576, pp. 379–393. Springer, Heidelberg (2005)
Bierman, G., Meijer, E., Schulte, W.: The essence of data access in Cω., http://research.microsoft.com/~emeijer
Gottlob, G., Koch, C., Pichler, R.: Efficient algorithms for processing XPath queries. In: Proceedings of the 28th International Conference on Very Large Data Bases (VLDB), Hong Kong (2002)
Harren, M., Raghavachari, M., Shmueli, O., Burke, M., Bordawekar, R., Pechtchanski, I., Sarkar, V.: XJ: Facilitating XML processing in Java. In: Proceedings of World Wide Web (WWW), pp. 278–287 (May 2005)
Miklau, G., Suciu, D.: Containment and equivalence for a fragment of XPath. J. ACM 51(1), 2–45 (2004)
Neven, F., Schwentick, T.: XPath containment in the presence of disjunction, dTDs, and variables. In: Calvanese, D., Lenzerini, M., Motwani, R. (eds.) ICDT 2003. LNCS, vol. 2572, pp. 312–326. Springer, Heidelberg (2002)
Raghavachari, M., Shmueli, O.: Efficient schema-based revalidation of XML. In: Bertino, E., Christodoulakis, S., Plexousakis, D., Christophides, V., Koubarakis, M., Böhm, K., Ferrari, E. (eds.) EDBT 2004. LNCS, vol. 2992, pp. 639–657. Springer, Heidelberg (2004)
Sur, G., Hammer, J., Sim´eon, J.: UpdateX - an XQuery-based language for processing updates. In: PLAN-X (January 2004)
Tatarinov, I., Ives, Z., Halevy, A., Weld, D.: Updating XML. In: Proc. ACM SIGMOD Int. Conf. on Management of Data (June 2001)
World Wide Web Consortium. XQuery 1.0: An XML Query Language, W3C Working draft (April 2005)
World Wide Web Consortium. XQuery Update Facility Requirements (June 2005)
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2006 Springer-Verlag Berlin Heidelberg
About this paper
Cite this paper
Raghavachari, M., Shmueli, O. (2006). Conflicting XML Updates. In: Ioannidis, Y., et al. Advances in Database Technology - EDBT 2006. EDBT 2006. Lecture Notes in Computer Science, vol 3896. Springer, Berlin, Heidelberg. https://doi.org/10.1007/11687238_34
Download citation
DOI: https://doi.org/10.1007/11687238_34
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-540-32960-2
Online ISBN: 978-3-540-32961-9
eBook Packages: Computer ScienceComputer Science (R0)