A unified treatment of null values using constraints
Information Sciences: an International Journal
On supporting containment queries in relational database management systems
SIGMOD '01 Proceedings of the 2001 ACM SIGMOD international conference on Management of data
Holistic twig joins: optimal XML pattern matching
Proceedings of the 2002 ACM SIGMOD international conference on Management of data
Using histograms to estimate answer sizes for XML queries
Information Systems - Special issue: Best papers from EDBT 2002
Indexing and Querying XML Data for Regular Path Expressions
Proceedings of the 27th International Conference on Very Large Data Bases
Quilt: An XML Query Language for Heterogeneous Data Sources
Selected papers from the Third International Workshop WebDB 2000 on The World Wide Web and Databases
UnQL: a query language and algebra for semistructured data based on structural recursion
The VLDB Journal — The International Journal on Very Large Data Bases
Structural Joins: A Primitive for Efficient XML Query Pattern Matching
ICDE '02 Proceedings of the 18th International Conference on Data Engineering
Efficient structural joins with clustered extents
Information Processing Letters - Devoted to the rapid publication of short contributions to information processing
Information Sciences: an International Journal
Efficient structural joins on indexed XML documents
VLDB '02 Proceedings of the 28th international conference on Very Large Data Bases
Holistic twig joins on indexed XML documents
VLDB '03 Proceedings of the 29th international conference on Very large data bases - Volume 29
An indexing method for wireless broadcast XML data
Information Sciences: an International Journal
Energy and quality aware query processing in wireless sensor database systems
Information Sciences: an International Journal
XTREAM: An efficient multi-query evaluation on streaming XML data
Information Sciences: an International Journal
Effective pruning for XML structural match queries
Data & Knowledge Engineering
CIS-X: A compacted indexing scheme for efficient query evaluation of XML documents
Information Sciences: an International Journal
| Hi-index | 0.07 |
For accelerating a structural join operation, current techniques focus on skipping elements that do not contribute to the results. They make use of external index structures (e.g. B+ tree) to determine a bunch of elements to be skipped. However, external indexes are too heavy for a structural join and the overhead of index lookups can reduce the benefit of skipping. In this paper, we proposed element trees and distribution encoded bitmaps for efficient element skipping. With proposed techniques, we can exploit the distribution of elements as well as the context information of a query for efficient skipping of unnecessary elements.