2546 search results - page 42 / 510 » Managing long-running queries |
189
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CCS
2008
ACM
15 years 8 months ago
2008
ACM
We propose an approach for the selective enforcement of access control restrictions in, possibly distributed, large data collections based on two basic concepts: i) flexible autho...
147
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CIKM
2006
Springer
15 years 10 months ago
2006
Springer
The I/O performance of query processing can be improved using two complementary approaches. One can try to improve on the buffer and the file system management policies of the DB ...
240
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ICDE
2012
IEEE
13 years 8 months ago
2012
IEEE
Abstract—Relational database management systems are general in the sense that they can handle arbitrary schemas, queries, and modifications; this generality is implemented using...
144
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WWW
2004
ACM
16 years 6 months ago
2004
ACM
This paper describes a query algebra for queries over XML p2p databases that provides explicit mechanisms for modeling data dissemination, replication constraints, and for capturi...
179
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VLDB
2001
ACM
15 years 10 months ago
2001
ACM
ct Information Integration is among the most important fields in information management. The problem of integrating data from diverse, possibly heterogeneous data sources is ubiqu...