186 search results - page 6 / 38 » Queries and materialized views on probabilistic databases |
SIGMOD
2001
ACM
15 years 9 months ago
2001
ACM
Materialized views can provide massive improvements in query processing time, especially for aggregation queries over large tables. To realize this potential, the query optimizer ...
VLDB
2004
ACM
15 years 2 months ago
2004
ACM
XML languages, such as XQuery, XSLT and SQL/XML, employ XPath as the search and extraction language. XPath expressions often define complicated navigation, resulting in expensive...
VLDB
2005
ACM
15 years 2 months ago
2005
ACM
As a simple XML query language but with enough expressive power, XPath has become very popular. To expedite evaluation of XPath queries, we consider the problem of rewriting XPath...
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ICDE
2007
IEEE
15 years 10 months ago
2007
IEEE
Queries containing outer joins are common in data warehousing applications. Materialized outer-join views could greatly speed up many such queries but most database systems do not...
WAIM
2010
Springer
14 years 7 months ago
2010
Springer
Materialized views which are derived from base relations and stored in the database are often used to speed up query processing. In this paper, we leverage them in a traceable peer...