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PVLDB
2008
15 years 6 months ago
2008
Estimates of predicate selectivities by database query optimizers often differ significantly from those actually encountered during query execution, leading to poor plan choices a...
210
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PVLDB
2008
15 years 6 months ago
2008
This paper studies, for the first time, the management of type information for an important class of semi-structured data: nested DAGs (Directed Acyclic Graphs) that describe exec...
193
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PVLDB
2008
15 years 6 months ago
2008
This paper introduces Clustera, an integrated computation and data management system. In contrast to traditional clustermanagement systems that target specific types of workloads,...
168
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PVLDB
2008
15 years 6 months ago
2008
A fundamental problem in information integration is to precisely specify the relationships, called mappings, between schemas. Designing mappings is a time-consuming process. To al...
162
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PVLDB
2008
15 years 6 months ago
2008
Forms-based query interfaces are widely used to access databases today. The design of a forms-based interface is often a key step in the deployment of a database. Each form in suc...