33 search results - page 1 / 7 » Pruning nested XQuery queries |
CIKM
2008
Springer
13 years 6 months ago
2008
Springer
We present in this paper an approach for XQuery optimization that exploits minimization opportunities raised in composition-style nesting of queries. More precisely, we consider t...
SIGMOD
2006
ACM
14 years 5 months ago
2006
ACM
We present and analyze an algorithm for equivalent rewriting of XQuery queries using XQuery views, which is complete for a large class of XQueries featuring nested FLWR blocks, XM...
IDEAS
2003
IEEE
13 years 10 months ago
2003
IEEE
In the past few years, much attention has been paid to the study of semistructured data, i.e., data with irregular, possibly unstable, and rapidly changing structure, and, in part...
ICDE
2004
IEEE
14 years 6 months ago
2004
IEEE
We describe and evaluate a query minimization technique that applies to XQueries, which are nested, perform arbitrary joins, and freely mix bag and set semantics. These features c...
ICDE
2004
IEEE
14 years 6 months ago
2004
IEEE
We present algebraic equivalences that allow to unnest nested algebraic expressions for order-preserving algebraic operators. We illustrate how these equivalences can be applied s...