530 search results - page 54 / 106 » Extensible Query Processing in Starburst |
PVLDB
2008
13 years 10 months ago
2008
Estimates of predicate selectivities by database query optimizers often differ significantly from those actually encountered during query execution, leading to poor plan choices a...
VLDB
2007
ACM
14 years 11 months ago
2007
ACM
The growing nature of databases, and the flexibility inherent in the SQL query language that allows arbitrarily complex formulations, can result in queries that take inordinate am...
CIKM
2008
Springer
14 years 1 months ago
2008
Springer
Time is an important dimension of relevance for a large number of searches, such as over blogs and news archives. So far, research on searching over such collections has largely f...
SIGMOD
2006
ACM
14 years 11 months ago
2006
ACM
Given a dataset P and a preference function f, a top-k query retrieves the k tuples in P with the highest scores according to f. Even though the problem is well-studied in convent...
VLDB
1999
ACM
14 years 3 months ago
1999
ACM
XML is fast emerging as the dominant standard for representing data in the World Wide Web. Sophisticated query engines that allow users to effectively tap the data stored in XML d...