363 search results - page 19 / 73 » Analyzing Plan Diagrams of Database Query Optimizers |
GIS
2006
ACM
14 years 8 months ago
2006
ACM
Remotely sensed data, in particular satellite imagery, play many important roles in environmental applications and models. In particular applications that study (rapid) changes in...
ICDE
2008
IEEE
14 years 9 months ago
2008
IEEE
Data sources on the web are often accessible through web interfaces that present them as relational tables, but require certain attributes to be mandatorily selected, e.g., via a w...
SIGMOD
2001
ACM
14 years 7 months ago
2001
ACM
We study the problem of generating e cient, equivalent rewritings using views to compute the answer to a query. We take the closed-world assumption, in which views are materialize...
SIGMOD
1995
ACM
13 years 11 months ago
1995
ACM
Text is a pervasive information type, and many applications require querying over text sources in addition to structured data. This paper studies the problem of query processing i...
SIGMOD
2001
ACM
14 years 7 months ago
2001
ACM
Time-referenced data are pervasive in most real-world databases. Recent advances in temporal query languages show that such database applications may benefit substantially from bu...