405 search results - page 38 / 81 » Semantic Assumptions and Query Evaluation in Temporal Databa... |
PODS
2008
ACM
15 years 12 months ago
2008
ACM
In the study of data exchange one usually assumes an openworld semantics, making it possible to extend instances of target schemas. An alternative closed-world semantics only move...
KRDB
1998
15 years 1 months ago
1998
Previous researchers note the problem for semantic optimisation of database queries caused by its production of a large number of semantically equivalent alternative queries, from...
174
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SIGMOD
2006
ACM
15 years 12 months ago
2006
ACM
Recently, there has been extensive research that generated a wealth of new XML full-text query languages, ranging from simple Boolean search to combining sophisticated proximity a...
103
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PPDP
2010
Springer
14 years 10 months ago
2010
Springer
Database query optimizers rely on data statistics in selecting query execution plans. Similar query optimization techniques are desirable for deductive databases and, to make this...
193
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Publication
This paper presents the Scalable On-Line Execution algorithm (SOLE, for short) for continuous and on-line evaluation of concurrent continuous spatio- temporal queries over data str...