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DATESO
2008
131views Database» more  DATESO 2008»
11 years 6 months ago
Towards Cost-based Optimizations of Twig Content-based Queries
Abstract In recent years, many approaches to indexing XML data have appeared. These approaches attempt to process XML queries efficiently and sufficient query plans are built for t...
Michal Krátký, Radim Baca
DEXAW
2007
IEEE
124views Database» more  DEXAW 2007»
11 years 9 months ago
XML Query Optimisation: Specify your Selectivity
The problem of efficiently evaluating XPath and XQuery queries has become increasingly significant since more and more XML data is stored in its native form. We propose a novel op...
Sven Hartmann, Sebastian Link
VLDB
2001
ACM
113views Database» more  VLDB 2001»
11 years 9 months ago
Querying XML Views of Relational Data
XML has emerged as the standard data exchange format for Internet-based business applications. This has created the need to publish existing business data, stored in relational da...
Jayavel Shanmugasundaram, Jerry Kiernan, Eugene J....
ECWEB
2001
Springer
206views ECommerce» more  ECWEB 2001»
11 years 9 months ago
Extracting Object-Oriented Database Schemas from XML DTDs Using Inheritance
As XML has become an emerging standard for information exchange on the World Wide Web, it has gained attention in database communities to extract information from XML seen as a dat...
Tae-Sun Chung, Sangwon Park, Sang-Yong Han, Hyoung...
DBPL
2003
Springer
144views Database» more  DBPL 2003»
11 years 10 months ago
A General Framework for Estimating XML Query Cardinality
Abstract. In the context of XML data management systems, the estimation of query cardinality is becoming more and more important: the information provided by a query result estimat...
Carlo Sartiani
VLDB
2004
ACM
124views Database» more  VLDB 2004»
11 years 10 months ago
Containment of Nested XML Queries
Query containment is the most fundamental relationship between a pair of database queries: a query Q is said to be contained in a query Q if the answer for Q is always a subset of...
Xin Dong, Alon Y. Halevy, Igor Tatarinov
VLDB
2005
ACM
139views Database» more  VLDB 2005»
11 years 10 months ago
Statistical Learning Techniques for Costing XML Queries
Developing cost models for query optimization is significantly harder for XML queries than for traditional relational queries. The reason is that XML query operators are much mor...
Ning Zhang 0002, Peter J. Haas, Vanja Josifovski, ...
CIKM
2009
Springer
11 years 12 months ago
Towards non-directional Xpath evaluation in a RDBMS
XML query languages use directional path expressions to locate data in an XML data collection. They are tightly coupled to the structure of a data collection, and can fail when ev...
Sourav S. Bhowmick, Curtis E. Dyreson, Erwin Leona...
WWW
2009
ACM
12 years 1 days ago
Performing grouping and aggregate functions in XML queries
Since more and more business data are represented in XML format, there is a compelling need of supporting analytical operations in XML queries. Particularly, the latest ver
Huayu Wu, Tok Wang Ling, Liang Xu, Zhifeng Bao
SIGMOD
2002
ACM
196views Database» more  SIGMOD 2002»
12 years 5 months ago
Storing and querying ordered XML using a relational database system
XML is quickly becoming the de facto standard for data exchange over the Internet. This is creating a new set of data management requirements involving XML, such as the need to st...
Igor Tatarinov, Stratis Viglas, Kevin S. Beyer, Ja...
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