121 search results - page 3 / 25 » A General Framework for Estimating XML Query Cardinality |
SIGMOD
2007
ACM
14 years 8 months ago
2007
ACM
Good cardinality estimates are critical for generating good execution plans during query optimization. Complex predicates, correlations between columns, and user-defined functions...
VLDB
2001
ACM
14 years 29 days ago
2001
ACM
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...
EDBT
2006
ACM
14 years 8 months ago
2006
ACM
In this paper we present a novel approach for estimating the selectivity of XML twig queries. Such a technique is useful for approximate query answering as well as for determining...
SIGMOD
2004
ACM
14 years 8 months ago
2004
ACM
Cardinality estimation during query optimization relies on simplifying assumptions that usually do not hold in practice. To diminish the impact of inaccurate estimates during opti...
PVLDB
2008
13 years 8 months ago
2008
Past work has suggested that query execution feedback can be useful in improving the quality of plans by correcting cardinality estimation errors in the query optimizer. The state...