SIGMOD
2005
ACM
14 years 4 months ago
2005
ACM
Data analysts need to understand the quality of data in the warehouse. This is often done by issuing many Group By queries on the sets of columns of interest. Since the volume of ...
SIGMOD
2005
ACM
14 years 4 months ago
2005
ACM
Searching for all occurrences of a twig pattern in an XML document is an important operation in XML query processing. Recently a holistic method TwigStack [2] has been proposed. T...
SIGMOD
2005
ACM
14 years 4 months ago
2005
ACM
The problem of estimating progress for long-running queries has recently been introduced. We analyze the characteristics of the progress estimation problem, from the perspective o...
SIGMOD
2005
ACM
14 years 4 months ago
2005
ACM
SIGMOD
2005
ACM
14 years 4 months ago
2005
ACM
In this paper, we study the evaluation of skyline queries with partially-ordered attributes. Because such attributes lack a total ordering, traditional index-based evaluation algo...
SIGMOD
2005
ACM
14 years 4 months ago
2005
ACM
XML documents are normally stored as plain text files. Hence, the natural and most convenient way to update XML documents is to simply edit the text files. But efficient query eva...
SIGMOD
2005
ACM
14 years 4 months ago
2005
ACM
SIGMOD
2005
ACM
14 years 4 months ago
2005
ACM
SIGMOD
2005
ACM
14 years 4 months ago
2005
ACM
In recent years there has been considerable research on automated selection of physical design in database systems. In current solutions, candidate access paths are heuristically ...
SIGMOD
2005
ACM
14 years 4 months ago
2005
ACM
We present a method to evaluate path queries based on the novel concept of partial path instances. Our method (1) maximizes performance by means of sequential scans or asynchronou...