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Distributed xquery (2004)
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| Venue: | In IIWeb |
| Citations: | 30 - 3 self |
BibTeX
@INPROCEEDINGS{Re04distributedxquery,
author = {Christopher Re and James Brinkley},
title = {Distributed xquery},
booktitle = {In IIWeb},
year = {2004},
pages = {116--121}
}
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Abstract
XQuery is increasingly being used for ad-hoc integration of heterogeneous data sources that are logically mapped to XML. For example, scientists need to query multiple scientific databases, which are distributed over a large geographic area, and it is possible to use XQuery for that. However, the language currently supports only the data shipping query evaluation model (through the document() function): it fetches all data sources to a single server, then runs the query there. This is a major limitation for many applications, especially when some data sources are very large, or when a data source is only a virtual XML view over some other logical data model. We propose here a simple extension to XQuery that allows query shipping to be expressed in the language, in addition to data shipping. Example 1.1 For a simple illustration, consider the following example:
