7 search results - page 1 / 2 » Nested Queries and Quantifiers in an Ordered Context |
ICDE
2004
IEEE
15 years 8 days 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...
BNCOD
2007
14 years 11 days ago
2007
Order is essential for XML query processing. Efficient XML processing with order consideration over relational storage is non-trivial, especially for complex nested XQuery expressi...
ICDT
1997
ACM
14 years 3 months ago
1997
ACM
Abstract. The goal of this paper is to study tractable iteration mechanisms for bags. The presence of duplicates in bags prevents iteration mechanisms developed in the context of s...
ICDE
2010
IEEE
14 years 10 months ago
2010
IEEE
The skyline query returns the most interesting tuples according to a set of explicitly defined preferences among attribute values. This work relaxes this requirement, and allows us...
EURONGI
2008
Springer
14 years 20 days ago
2008
Springer
Current mobility management systems are operator centralized, and focused on single link technologies. In heterogeneous wireless mesh networks, vertical handovers could be a length...