3269 search results - page 246 / 654 » Query Optimization for XML |
182
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SIGMOD
2004
ACM
16 years 4 months ago
2004
ACM
Virtually every commercial query optimizer chooses the best plan for a query using a cost model that relies heavily on accurate cardinality estimation. Cardinality estimation erro...
125
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ICDE
2010
IEEE
15 years 11 months ago
2010
IEEE
—Many modern optimizers use a transformation rule based framework. While there has been a lot of work on identifying new transformation rules, there has been little work focused ...
166
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EWDW
1994
15 years 8 months ago
1994
For object-oriented databases we propose a new technique for optimizing queries containing method invocations. This technique is based on the definition of inverse methods and que...
145
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PVLDB
2010
15 years 2 months ago
2010
The need to improve a suboptimal execution plan picked by the query optimizer for a repeatedly run SQL query arises routinely. Complex expressions, skewed or correlated data, and ...
SIGMOD
2002
ACM
16 years 4 months ago
2002
ACM
Statistics play an important role in influencing the plans produced by a query optimizer. Traditionally, optimizers use statistics built over base tables and assume independence b...