2724 search results - page 77 / 545 » Optimizing Queries on Files |
154
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DBPL
2003
Springer
15 years 6 months ago
2003
Springer
Abstract. In the context of XML data management systems, the estimation of query cardinality is becoming more and more important: the information provided by a query result estimat...
220
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GIS
2005
ACM
16 years 2 months ago
2005
ACM
Group nearest neighbor (GNN) queries are a relatively new type of operations in spatial database applications. Different from a traditional kNN query which specifies a single quer...
201
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SIGMOD
2007
ACM
16 years 1 months ago
2007
ACM
Complex queries often contain common or similar subexpressions, either within a single query or among multiple queries submitted as a batch. If so, query execution time can be imp...
201
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ICDE
2009
IEEE
16 years 3 months ago
2009
IEEE
Commercial database systems expose query hints to address situations in which the optimizer chooses a poor plan for a given query. However, current query hints are not flexible eno...
176
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SIGMOD
2005
ACM
16 years 1 months ago
2005
ACM
Research on query optimization has focused almost exclusively on reducing query execution time, while important qualities such as consistency and predictability have largely been ...