Sciweavers

14248 search results - page 98 / 2850
» Queries
Sort
View
GRID
2003
Springer
14 years 2 months ago
Scoped and Approximate Queries in a Relational Grid Information Service
We are developing a grid information service, RGIS, that is based on the relational data model. RGIS supports complex queries written in SQL that search for compositions (using jo...
Dong Lu, Peter A. Dinda, Jason A. Skicewicz
PODS
2010
ACM
249views Database» more  PODS 2010»
14 years 2 months ago
Semantic query optimization in the presence of types
Both semantic and type-based query optimization rely on the idea that queries often exhibit non-trivial rewritings if the state space of the database is restricted. Despite their ...
Michael Meier 0002, Michael Schmidt, Fang Wei, Geo...
ITCC
2002
IEEE
14 years 1 months ago
Analysis of Combining Multiple Query Representations with Varying Lengths in a Single Engine
We examine the issues of combining multiple query representations in a single IR engine. Differing query representations are used to retrieve different documents. Thus, when combi...
Abdur Chowdhury, Steven M. Beitzel, Eric C. Jensen
SIGMOD
2010
ACM
171views Database» more  SIGMOD 2010»
14 years 1 months ago
Variance aware optimization of parameterized queries
Parameterized queries are commonly used in database applications. In a parameterized query, the same SQL statement is potentially executed multiple times with different parameter ...
Surajit Chaudhuri, Hongrae Lee, Vivek R. Narasayya
EDBT
2009
ACM
160views Database» more  EDBT 2009»
14 years 1 months ago
Estimating aggregates in time-constrained approximate queries in Oracle
The concept of time-constrained SQL queries was introduced to address the problem of long-running SQL queries. A key approach adopted for supporting time-constrained SQL queries i...
Ying Hu, Seema Sundara, Jagannathan Srinivasan