325 search results - page 30 / 65 » HyperGraphDB: A Generalized Graph Database |
SIGMOD
2009
ACM
14 years 9 months ago
2009
ACM
Reachability queries on large directed graphs have attracted much attention recently. The existing work either uses spanning structures, such as chains or trees, to compress the c...
GIS
2006
ACM
14 years 9 months ago
2006
ACM
The result of a distance join operation on two sets of objects R, S on a spatial network G is a set P of object pairs <p, q>, p R, q S such that the distance of an object ...
SIGMOD
2010
ACM
14 years 1 months ago
2010
ACM
Current relational databases require that a database schema exist prior to data entry and require manual optimization for best performance. We describe the query optimization tech...
PPOPP
2010
ACM
14 years 6 months ago
2010
ACM
Effective data placement strategies can enhance the performance of data-intensive applications implemented on high end computing clusters. Such strategies can have a significant i...
VLDB
1994
ACM
14 years 23 days ago
1994
ACM
A new type of optimization, called predicate move-around, ia introduced. It is shown how this optimization `considerably improvea the efficiency of evaluating SQL queries that hav...