15033 search results - page 2909 / 3007 » Complexity Theory and Algorithms |
226
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SIGMOD
2007
ACM
16 years 4 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...
198
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SIGMOD
2007
ACM
16 years 4 months ago
2007
ACM
Optimizing SQL subqueries has been an active area in database research and the database industry throughout the last decades. Previous work has already identified some approaches ...
169
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SIGMOD
2004
ACM
16 years 4 months ago
2004
ACM
The rapid adoption of XML as the standard for data representation and exchange foreshadows a massive increase in the amounts of XML data collected, maintained, and queried over th...
135
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PODS
2008
ACM
16 years 4 months ago
2008
ACM
A schema mapping is a specification that describes how data from a source schema is to be mapped to a target schema. Once the data has been transferred from the source to the targ...
150
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PODS
2008
ACM
16 years 4 months ago
2008
ACM
A fundamental problem in distributed computation is the distributed evaluation of functions. The goal is to determine the value of a function over a set of distributed inputs, in ...