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IEEECSA
2009
15 years 4 months ago
Improved Query Plans for Unnesting Nested SQL Queries
- The SQL language allows users to express queries that have nested subqueries in them. Optimization of nested queries has received considerable attention over the last few years. ...
Pranav Khaitan, Satish Kumar M, Korra Sathya Babu,...
WSDM
2012
ACM
290views Data Mining» more  WSDM 2012»
14 years 2 months ago
Online selection of diverse results
The phenomenal growth in the volume of easily accessible information via various web-based services has made it essential for service providers to provide users with personalized ...
Debmalya Panigrahi, Atish Das Sarma, Gagan Aggarwa...
ICDE
2007
IEEE
113views Database» more  ICDE 2007»
16 years 8 months ago
Reducing Order Enforcement Cost in Complex Query Plans
Algorithms that exploit sort orders are widely used to implement joins, grouping, duplicate elimination and other set operations. Query optimizers traditionally deal with sort ord...
Ravindra Guravannavar, S. Sudarshan
SIGMOD
2007
ACM
150views Database» more  SIGMOD 2007»
16 years 6 months ago
Exploiting self-monitoring sample views for cardinality estimation
Good cardinality estimates are critical for generating good execution plans during query optimization. Complex predicates, correlations between columns, and user-defined functions...
Jingren Zhou, Per-Åke Larson, Peter Zabback,...
ICCAD
2003
IEEE
98views Hardware» more  ICCAD 2003»
16 years 3 months ago
Achieving Design Closure Through Delay Relaxation Parameter
Current design automation methodologies are becoming incapable of achieving design closure especially in the presence of deep submicron effects. This paper addresses the issue of ...
Ankur Srivastava, Seda Ogrenci Memik, Bo-Kyung Cho...