409 search results - page 9 / 82 » Plan Databases: Model and Algebra |
VLDB
2005
ACM
15 years 2 months ago
2005
ACM
A “plan diagram” is a pictorial enumeration of the execution plan choices of a database query optimizer over the relational selectivity space. In this paper, we present and an...
TOOLS
1999
IEEE
15 years 1 months ago
1999
IEEE
Class algebra provides a natural framework for sharing of ISA hierarchies between users that may be unaware of each other's definitions. This permits data from relational dat...
AMAI
2006
Springer
2006
Springer
Functional and multivalued dependencies in nested databases generated by record and list constructor
14 years 9 months ago
tor. In order to capture different data models at a time, an abstract algebraic approach based on nested attributes is taken. The presence of the list constructor calls for a new i...
BTW
2007
Springer
15 years 1 months ago
2007
Springer
: Relational database systems are highly efficient hosts to table-shaped data. It is all the more interesting to see how a careful inspection of both, the XML tree structure as wel...
ICDE
1994
IEEE
15 years 1 months ago
1994
IEEE
The relational data model is based on sets of tuples, i.e. it does not allow duplicate tuples in a relation. Many database languages and systems do require multi-set place, the hi...