Sciweavers

3269 search results - page 290 / 654
» Query Optimization for XML
Sort
View
ICDE
2006
IEEE
152views Database» more  ICDE 2006»
15 years 10 months ago
Redundancy Awareness in SQL Queries
In this paper, we study SQL queries with aggregate subqueries that share common tables and conditions with the outer query. While several approaches can deal with such queries, th...
Bin Cao, Antonio Badia
DEXA
2006
Springer
113views Database» more  DEXA 2006»
15 years 8 months ago
Dynamic Range Query in Spatial Network Environments
Moving range queries over mobile objects are important in many location management applications. There have been quite a few research works in this area. However, all existing solu...
Fuyu Liu, Tai T. Do, Kien A. Hua
SKG
2006
IEEE
15 years 10 months ago
XML Metadata Services
— As the Service Oriented Architecture (SOA) principles have gained importance, an emerging need has appeared for methodologies to locate desired services that provide access to ...
Mehmet S. Aktas, Sangyoon Oh, Geoffrey Fox, Marlon...
PODS
2003
ACM
142views Database» more  PODS 2003»
16 years 4 months ago
Query containment and rewriting using views for regular path queries under constraints
In this paper we consider general path constraints for semistructured databases. Our general constraints do not suffer from the limitations of the path constraints previously stud...
Gösta Grahne, Alex Thomo
FOIKS
2004
Springer
15 years 10 months ago
Query Answering and Containment for Regular Path Queries under Distortions
Abstract. We give a general framework for approximate query processing in semistructured databases. We focus on regular path queries, which are the integral part of most of the que...
Gösta Grahne, Alex Thomo