716 search results - page 52 / 144 » Optimizing Queries in Extended Relational Databases |
PODS
2001
ACM
15 years 11 months ago
2001
ACM
Database systems frequently have to execute a set of related queries, which share several common subexpressions. Multi-query optimization exploits this, by finding evaluation plan...
MFDBS
1989
15 years 3 months ago
1989
One of the key problems when extending relational database query languages to include deductive capabilities, is to provide them with efficient methods for answering recursive que...
105
click to vote
DKE
2010
14 years 11 months ago
2010
We describe the Consistency Extractor System (ConsEx) that computes consistent answers to Datalog queries with negation posed to relational databases that may be inconsistent with...
126
click to vote
EDBT
2011
ACM
14 years 2 months ago
2011
ACM
The popularity of batch-oriented cluster architectures like Hadoop is on the rise. These batch-based systems successfully achieve high degrees of scalability by carefully allocati...
SIGMOD
2002
ACM
15 years 11 months ago
2002
ACM
Statistics play an important role in influencing the plans produced by a query optimizer. Traditionally, optimizers use statistics built over base tables and assume independence b...