109 search results - page 22 / 22 » Optimization Using Tuple Subsumption |
194
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SIGMOD
2009
ACM
15 years 12 months ago
2009
ACM
Research has investigated mappings among data sources under two perspectives. On one side, there are studies of practical tools for schema mapping generation; these focus on algor...
103
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SIGMOD
2000
ACM
15 years 4 months ago
2000
ACM
We present WSQ/DSQ (pronounced “wisk-disk”), a new approach for combining the query facilities of traditional databases with existing search engines on the Web. WSQ, for Web-S...
104
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POPL
1998
ACM
15 years 3 months ago
1998
ACM
abstractions, such as closures, tuples, and user-defined abstract data types. The type system ensures that well-typed programs cannot violate these abstractions. In addition, the ...
ISCI
2007
14 years 11 months ago
2007
Selectivity estimation is an important step of query optimization in a database management system, and multidimensional histogram techniques have proved promising for selectivity ...