243 search results - page 17 / 49 » Selectivity Estimation for Boolean Queries |
BTW
2009
Springer
15 years 2 months ago
2009
Springer
: Cost-based optimizers in relational databases make use of data statistics to estimate intermediate result cardinalities. Those cardinalities are needed to estimate access plan co...
SIGIR
1998
ACM
15 years 1 months ago
1998
ACM
Most casual users of IR systems type short queries. Recent research has shown that adding new words to these queries via adhoc feedback improves the retrieval e ectiveness of such ...
81
Voted
BNCOD
2008
14 years 11 months ago
2008
Abstract. Accurate selectivity estimations are essential for query optimization decisions where they are typically derived from various kinds of histograms which condense value dis...
AAAI
2008
14 years 12 months ago
2008
Compilation is an important approach to a range of inference problems, since it enables linear-time inference in the size S of the compiled representation. However, the main drawb...
ADBIS
2010
Springer
14 years 9 months ago
2010
Springer
Abstract. The last years there is an increasing interest for query processing techniques that take into consideration the dominance relationship between objects to select the most ...