Sciweavers

Share
2 search results - page 1 / 1
» CORDS: Automatic Discovery of Correlations and Soft Function...
Sort
View
SIGMOD
2004
ACM
184views Database» more  SIGMOD 2004»
12 years 1 months ago
CORDS: Automatic Discovery of Correlations and Soft Functional Dependencies
The rich dependency structure found in the columns of real-world relational databases can be exploited to great advantage, but can also cause query optimizers--which usually assum...
Ihab F. Ilyas, Volker Markl, Peter J. Haas, Paul B...
VLDB
2004
ACM
123views Database» more  VLDB 2004»
11 years 6 months ago
CORDS: Automatic Generation of Correlation Statistics in DB2
When query optimizers erroneously assume that database columns are statistically independent, they can underestimate the selectivities of conjunctive predicates by orders of magni...
Ihab F. Ilyas, Volker Markl, Peter J. Haas, Paul G...
books