261 search results - page 15 / 53 » An Optimization Technique for Answering Regular Path Queries |
SIGMOD
1999
ACM
15 years 4 months ago
1999
ACM
In large data warehousing environments, it is often advantageous to provide fast, approximate answers to complex aggregate queries based on statistical summaries of the full data....
180
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ICDE
2007
IEEE
16 years 1 months ago
2007
IEEE
There has been a great deal of work in recent years on processing and optimizing queries against XML data. Typically in these previous works, schema information is not considered,...
SIGMOD
2004
ACM
15 years 12 months ago
2004
ACM
Trees and graphs are widely used to model biological databases. Providing efficient algorithms to support tree-based or graph-based querying is therefore an important issue. In th...
SIGMOD
2002
ACM
15 years 12 months ago
2002
ACM
In this paper, we ask if the traditional relational query acceleration techniques of summary tables and covering indexes have analogs for branching path expression queries over tr...
116
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JACM
2008
14 years 11 months ago
2008
XML queries are usually expressed by means of XPath expressions identifying portions of the selected documents. An XPath expression defines a way of navigating an XML tree and ret...