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EDBT
2009
ACM
135views Database» more  EDBT 2009»
14 years 5 days ago
Provenance for nested subqueries
Data provenance is essential in applications such as scientific computing, curated databases, and data warehouses. Several systems have been developed that provide provenance fun...
Boris Glavic, Gustavo Alonso
IDEAS
2002
IEEE
135views Database» more  IDEAS 2002»
14 years 14 days ago
On Implicate Discovery and Query Optimization
Boolean expression simplification is a well-known problem in the history of Computer Science. The problem of determining prime implicates from an arbitrary Boolean expression has...
Kristofer Vorwerk, G. N. Paulley
DBA
2004
72views Database» more  DBA 2004»
13 years 9 months ago
Explicit and Implicit LIST Aggregate Function for Relational Databases
We argue for a new aggregate function we termed the LIST function. It aggregates a set of values of one or more attributes into a single value that is internally a list of these v...
Witold Litwin
EDBT
2008
ACM
118views Database» more  EDBT 2008»
14 years 7 months ago
Robustness in automatic physical database design
Automatic physical database design tools rely on "what-if" interfaces to the query optimizer to estimate the execution time of the training query workload under differen...
Kareem El Gebaly, Ashraf Aboulnaga
XIMEP
2006
ACM
161views Database» more  XIMEP 2006»
14 years 1 months ago
Programming with XQuery
XQuery is a declarative language for querying and updating XML data sources. Interfacing XQuery to a host programming language is difficult because of the type system mismatch, an...
Donald D. Chamberlin, Michael J. Carey, Daniela Fl...