363 search results - page 48 / 73 » Analyzing Plan Diagrams of Database Query Optimizers |
EDBT
2006
ACM
14 years 9 months ago
2006
ACM
In this paper we present a novel approach for estimating the selectivity of XML twig queries. Such a technique is useful for approximate query answering as well as for determining...
VLDB
1998
ACM
14 years 1 months ago
1998
ACM
Currently the key problems of query optimization are extensibility imposed by object-relational technology, as well as query complexity caused by forthcoming applications, such as...
SIGMOD
1998
ACM
14 years 1 months ago
1998
ACM
Remote data access from disparate sources across a widearea network such as the Internet is problematic due to the unpredictable nature of the communications medium and the lack o...
VLDB
1994
ACM
14 years 1 months ago
1994
ACM
We address the problem of finding parallel plans for SQL queries using the two-phase approach of join ordering followed by parallelization. We focus on the parallelization phase a...
EDBT
1992
ACM
14 years 17 days ago
1992
ACM
The DBGraph storage model, designed for main memory DBMS, ensures both data storage compactness and efficient processing for all database operations. By representing the entire da...