2514 search results - page 20 / 503 » On the Computation of Approximations of Database Queries |
297
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ICDE
2002
IEEE
16 years 7 months ago
2002
IEEE
XML and other semi-structured data may have partially specified or missing schema information, motivating the use of a structural summary which can be automatically computed from ...
168
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PODS
2004
ACM
16 years 6 months ago
2004
ACM
We study the problem of answering queries over sources with limited access patterns. Given a first-order query Q, the problem is to decide whether there is an equivalent query whi...
177
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IDEAS
2007
IEEE
16 years 14 days ago
2007
IEEE
There is an increasing need for an XML query engine that not only searches for exact matches to a query but also returns “query-like” structures. We have designed and develope...
176
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DEXA
2008
Springer
15 years 8 months ago
2008
Springer
We address the problem of maintaining continuous skyline queries efficiently over dynamic objects with d dimensions. Skyline queries are an important new search capability for mult...
185
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DEXAW
2007
IEEE
15 years 8 months ago
2007
IEEE
Due to the lack of efficient native XML database management systems, XML data manipulation and query evaluation may be resource-consuming, and represent a bottleneck for several ...