3225 search results - page 203 / 645 » Query Optimization by Stored Queries |
141
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VLDB
2004
ACM
15 years 10 months ago
2004
ACM
This paper presents a novel and complementary technique to optimize an XPath query by minimizing its wildcard steps. Our approach is based on using a general composite axis called...
169
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APPT
2003
Springer
15 years 9 months ago
2003
Springer
The increase number of mobile users in wireless environment affects query access time substantially. To minimise the query access time, one possible way is to employ data broadcast...
261
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ICDE
2001
IEEE
16 years 5 months ago
2001
IEEE
Semi-join reducers were introduced in the late seventies as a means to reduce the communication costs of distributed database systems. Subsequent work in the eighties showed, howe...
149
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PVLDB
2010
15 years 2 months ago
2010
Optimization of join queries based on average selectivities is suboptimal in highly correlated databases. In such databases, relations are naturally divided into partitions, each ...
130
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IDEAS
2008
IEEE
15 years 11 months ago
2008
IEEE
1 We propose a new framework for the summarization of XML document properties called EXsum (Element-wise XML summarization), which can capture statistical information of all import...