2228 search results - page 69 / 446 » A System for Semantic Query Optimization |
SIGMOD
2010
ACM
14 years 2 months ago
2010
ACM
Current relational databases require that a database schema exist prior to data entry and require manual optimization for best performance. We describe the query optimization tech...
ICEIS
2006
IEEE
14 years 3 months ago
2006
IEEE
The satisfiability test checks, whether or not the evaluation of a query returns the empty set for any input document, and can be used in query optimization for avoiding the submis...
VLDB
1994
ACM
14 years 1 months ago
1994
ACM
In existing relational database systems, processing of group-by and computation of aggregate functions are always postponed until all joins are performed. In this paper, we presen...
SIGMOD
2007
ACM
14 years 9 months ago
2007
ACM
Mashup Feeds is a system that supports integrated web service feeds as continuous queries. We introduce collectionbased stream processing semantics to enable information extractio...
SIGMOD
2008
ACM
14 years 9 months ago
2008
ACM
Text documents often embed data that is structured in nature. This structured data is increasingly exposed using information extraction systems, which generate structured relation...