716 search results - page 16 / 144 » Optimizing Queries in Extended Relational Databases |
105
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ICDE
2009
IEEE
14 years 9 months ago
2009
IEEE
Data provenance is information that describes how a given data item was produced. The provenance includes source and intermediate data as well as the transformations involved in pr...
82
Voted
SSDBM
2008
IEEE
15 years 5 months ago
2008
IEEE
Applications requiring the handling of uncertain data have led to the development of database management systems extending the scope of relational databases to include uncertain (p...
PODS
2004
ACM
15 years 11 months ago
2004
ACM
The problem of deciding query containment has important applications in classical query optimization and heterogeneous database systems. Query containment is undecidable for unres...
153
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SIGMOD
2006
ACM
15 years 11 months ago
2006
ACM
Relational XQuery systems try to re-use mature relational data management infrastructures to create fast and scalable XML database technology. This paper describes the main featur...
157
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SIGMOD
2008
ACM
15 years 11 months ago
2008
ACM
Today's query processing engines do not take advantage of the multiple occurrences of a relation in a query to improve performance. Instead, each instance is treated as a dis...