VLDB
1999
ACM
13 years 8 months ago
1999
ACM
The problem of nding the best answers to a query quickly, rather than nding all answers, is of increasing importance as relational databases are applied in multimedia and decision...
IDEAS
1999
IEEE
13 years 8 months ago
1999
IEEE
The number of documents published via WWW in form of SGML/HTML has been rapidly growing for years. Efficient, declarative access mechanisms for this type of documents
DASFAA
1999
IEEE
13 years 8 months ago
1999
IEEE
The spatial query has been processed in two steps, the filter step and the refinement step, due to a large volume and high complexity of the spatial data. However, this approach h...
ICDT
2001
ACM
13 years 8 months ago
2001
ACM
Rewriting queries using views is a powerful technique that has applications in query optimization, data integration, data warehousing etc. Query rewriting in relational databases ...
SIGMOD
2010
ACM
13 years 9 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...
PODS
2010
ACM
13 years 9 months ago
2010
ACM
Both semantic and type-based query optimization rely on the idea that queries often exhibit non-trivial rewritings if the state space of the database is restricted. Despite their ...
IDEAS
2003
IEEE
13 years 9 months ago
2003
IEEE
As the popularity of XML keeps growing rapidly, XML compliant structured document management becomes an interesting and compelling research area. Query optimization for structured...
ICDE
2010
IEEE
13 years 9 months ago
2010
IEEE
— Research on query optimization has traditionally focused on exhaustive enumeration of an exponential number of candidate plans. Alternatively, heuristics for query optimization...
VLDB
2004
ACM
13 years 9 months ago
2004
ACM
PIVOT and UNPIVOT, two operators on tabular data that exchange rows and columns, enable data transformations useful in data modeling, data analysis, and data presentation. They ca...
ADBIS
2004
Springer
13 years 9 months ago
2004
Springer
Abstract. Query reformulation techniques based on semantic knowledge have been used in two ways in database management systems, namely for query optimization and for data integrati...