Diogo Tuler Forlani,  Cristina Dutra de Aguiar Ciferri,  Ricardo Rodrigues Ciferri. 

In this paper we propose two algorithms aimed at increasing the performance of drill-across queries in data warehousing environments. The JMG algorithm is used when numeric measures of different data warehouses are usually required together. The EG-JM algorithm extends the first one also considering storage requirements. The performance tests carried out using the TPC-H benchmark showed a huge improvement on the query performance with a reduced additional storage requirement.

http://www.lbd.dcc.ufmg.br:8080/colecoes/sbbd/2006/021.pdf

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