121 search results - page 7 / 25 » A General Framework for Estimating XML Query Cardinality |
WEBI
2001
Springer
15 years 1 months ago
2001
Springer
In the proposed data model for XML databases, an XML element is directly represented as a ground (variable-free) XML expression—a generalization of an XML element by incorporatio...
VLDB
1989
ACM
15 years 1 months ago
1989
ACM
We present a framework for the estimation of the size of binary recursively defined relations. We show how the framework can be used to provide estimating algo rithms for the size...
106
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SIGMOD
2004
ACM
15 years 9 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...
116
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VLDB
2001
ACM
15 years 1 months ago
2001
ACM
Most modern DBMS optimizers rely upon a cost model to choose the best query execution plan (QEP) for any given query. Cost estimates are heavily dependent upon the optimizer’s e...
CIKM
2009
Springer
15 years 4 months ago
2009
Springer
Well-designed indices can dramatically improve query performance. Including query workload information can produce indices that yield better overall throughput while balancing the...