2228 search results - page 131 / 446 » A System for Semantic Query Optimization |
111
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SIGMOD
2011
ACM
14 years 26 days ago
2011
ACM
An important means of allowing non-expert end-users to pose ad hoc queries — whether over single databases or data integration systems — is through keyword search. Given a set...
CIDR
2007
14 years 11 months ago
2007
While there are known performance trade-offs between database page buffer pool and query execution memory allocation policies, little has been written on the impact of query compi...
ESWA
2008
14 years 10 months ago
2008
Traditional content-based image retrieval (CBIR) systems often fail to meet a user's need due to the `semantic gap' between the extracted features of the systems and the...
ENTCS
2006
14 years 10 months ago
2006
Data integration systems provide a uniform query interface (UQI) to multiple, autonomous data sources [4]. This paper presents the universal data model (UDM) that captures the sem...
151
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SIGMOD
2007
ACM
15 years 10 months ago
2007
ACM
Good cardinality estimates are critical for generating good execution plans during query optimization. Complex predicates, correlations between columns, and user-defined functions...