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2004

Dimension Compatibility for Data Mart Integration

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Dimension Compatibility for Data Mart Integration
The problem of integrating autonomous data marts arises when, e.g., a large organization (or a federation thereof) needs to combine independently developed data warehouses. It turns out that this problem can be tackled in a systematic way because of two main reasons. First, data marts are usually structured in a rather uniform way, along dimensions and facts. Second, data quality in data marts is usually higher than in generic databases, since they are obtained by reconciling several data sources. Our scenario of reference is a federation of various data marts that we need to query in a unified way by means of drillacross operations. We propose a novel notion of dimension compatibility and characterize its general properties. We then show the significance of dimension compatibility in performing drill-across queries over autonomous data marts.
Luca Cabibbo, Riccardo Torlone
Added 31 Oct 2010
Updated 31 Oct 2010
Type Conference
Year 2004
Where SEBD
Authors Luca Cabibbo, Riccardo Torlone
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