964 search results - page 54 / 193 » Efficiently Ordering Query Plans for Data Integration |
140
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EOR
2011
14 years 11 months ago
2011
Efficiency measurement is an important issue for any firm or organization. Efficiency measurement allows organizations to compare their performance with their competitors’ and t...
143
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PVLDB
2008
15 years 4 months ago
2008
Data integration systems often provide a uniform query interface, called a mediated schema, to a multitude of data sources. To answer user queries, such systems employ a set of se...
145
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PVLDB
2010
15 years 2 months ago
2010
The need to improve a suboptimal execution plan picked by the query optimizer for a repeatedly run SQL query arises routinely. Complex expressions, skewed or correlated data, and ...
138
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WWW
2006
ACM
16 years 5 months ago
2006
ACM
An important issue arising from large scale data integration is how to efficiently select the top-K ranking answers from multiple sources while minimizing the transmission cost. T...
152
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EDBTW
2006
Springer
15 years 6 months ago
2006
Springer
The need for incremental constraint maintenance within collections of semi-structured documents has been ever increasing in the last years due to the widespread diffusion of XML. T...