708 search results - page 50 / 142 » Optimizing SQL Queries over Text Databases |
ICDE
2005
IEEE
14 years 10 months ago
2005
IEEE
In this demonstration, we present a database over complex documents, which, in addition to a structured text content, also has update information, annotations, and embedded object...
SIGMOD
2007
ACM
14 years 9 months ago
2007
ACM
Complex queries often contain common or similar subexpressions, either within a single query or among multiple queries submitted as a batch. If so, query execution time can be imp...
SIGMOD
1999
ACM
14 years 1 months ago
1999
ACM
A major bottleneck in implementing sampling as a primitive relational operation is the ine ciency ofsampling the output of a query. It is not even known whether it is possible to ...
BNCOD
1997
13 years 10 months ago
1997
With the substantial change of declarative query languages from plain SQL to the so-called \object SQLs", in particular OQL, there has surprisingly been not much change in the...
EDBT
2006
ACM
14 years 9 months ago
2006
ACM
: This work describes a method for processing XPath on a relational back-end that significantly limits the number of SQL joins required, takes advantage of the strengths of modern ...