964 search results - page 3 / 193 » Efficiently Ordering Query Plans for Data Integration |
152
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ICDE
2000
IEEE
15 years 10 months ago
2000
IEEE
Execution plans produced by traditional query optimizers for data integration queries may yield poor performance for several reasons. The cost estimates may be inaccurate, the mem...
EDBT
2004
ACM
15 years 9 months ago
2004
ACM
Abstract. Non-contiguous subsequence pattern queries search for symbol instances in a long sequence that satisfy some soft temporal constraints. In this paper, we propose a methodo...
164
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ICDE
2003
IEEE
15 years 10 months ago
2003
IEEE
Structural join operations are central to evaluating queries against XML data, and are typically responsible for consuming a lion's share of the query processing time. Thus, ...
165
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ICDE
2006
IEEE
15 years 10 months ago
2006
IEEE
Counting in general, and estimating the cardinality of (multi-) sets in particular, is highly desirable for a large variety of applications, representing a foundational block for ...
78
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IJCAI
2003
14 years 10 months ago
2003
Information integration systems provide a uniform query interface to a set of sources. One of the key challenges for an information integration system is to provide maximally comp...