Sciweavers

2063 search results - page 15 / 413
» Containment of Aggregate Queries
Sort
View
WAIM
2009
Springer
14 years 4 months ago
Finding Irredundant Contained Rewritings of Tree Pattern Queries Using Views
Contained rewriting and maximal contained rewriting of tree pattern queries using views have been studied recently for the class of tree patterns involving /, //, and []. Given que...
Junhu Wang, Kewen Wang, Jiuyong Li
CIKM
2006
Springer
14 years 1 months ago
Heuristic containment check of partial tree-pattern queries in the presence of index graphs
The wide adoption of XML has increased the interest of the database community on tree-structured data management techniques. Querying capabilities are provided through tree-patter...
Dimitri Theodoratos, Stefanos Souldatos, Theodore ...
ICDE
2006
IEEE
119views Database» more  ICDE 2006»
14 years 11 months ago
Laws for Rewriting Queries Containing Division Operators
Relational division, also known as small divide, is a derived operator of the relational algebra that realizes a many-to-one set containment test, where a set is represented as a ...
Ralf Rantzau, Christoph Mangold
DEDUCTIVE
1994
119views Database» more  DEDUCTIVE 1994»
13 years 11 months ago
Determining Correct View Update Translations via Query Containment
Given an intensional database (IDB) and an extension database (EDB), the view update problem translates updates on the IDB into updates on the EDB. One approach to the view update...
Anthony Tomasic
VLDB
2009
ACM
151views Database» more  VLDB 2009»
14 years 10 months ago
Containment of partially specified tree-pattern queries in the presence of dimension graphs
Dimitri Theodoratos, Pawel Placek, Theodore Dalama...