2027 search results - page 217 / 406 » An Adaptive Query Execution System for Data Integration |
182
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VLDB
2004
ACM
15 years 11 months ago
2004
ACM
At a fundamental level, the key challenge in data integration is to reconcile the semantics of disparate data sets, each expressed with a different database structure. I argue th...
145
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BTW
2007
Springer
16 years 18 days ago
2007
Springer
B-tree and index into two layers of abstraction. In addition, this paper provides algorithms for (i) concurrency control and recovery including locking of individual keys and of co...
153
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ICDE
2010
IEEE
16 years 1 months ago
2010
IEEE
Abstract— In parallel query-processing environments, accurate, time-oriented progress indicators could provide much utility given that inter- and intra-query execution times can ...
200
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VLDB
2005
ACM
15 years 12 months ago
2005
ACM
Developing cost models for query optimization is significantly harder for XML queries than for traditional relational queries. The reason is that XML query operators are much mor...
265
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SIGMOD
2007
ACM
16 years 6 months ago
2007
ACM
An emerging challenge in modern distributed querying is to efficiently process multiple continuous aggregation queries simultaneously. Processing each query independently may be i...