منابع مشابه
Quality-adaptive Query Processing
For non-collaborative data sources, both cost estimate-based optimization and quality-driven query processing are difficult to achieve because the sources do not export cost information nor data quality indicators. In this paper, we first propose an expressive query language extension using QML syntax for defining in a flexible way dimensions, metrics of data quality and data source quality. We...
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ژورنال
عنوان ژورنال: Foundations and Trends® in Databases
سال: 2007
ISSN: 1931-7883,1931-7891
DOI: 10.1561/1900000001