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Abstract: OLAP systems support data analysis through a multidimensional data model, according to which data facts are viewed as points in a space of application-related "dimensions", organized into levels which conform a hierarchy. Although the usual assumption is that these points reflect the dynamic aspect of the data warehouse while dimensions are relatively static, in practice it turns out that dimension updates are often necessary to adapt the multidimensional database to changing requirements.... (Update)
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...tables. We present the details of the implementation of the Reclassify operators. We refer the reader to the full version of this paper [4] for details on the remaining operators. 3.1 Mapping Dimensions to Relations Denormalized Representation The idea in the denormalized...
...instance, we may have T oronto as a member of a level City in a dimension representing locations. In most of the models [CT97] HMV99a] HMV99b] the hierarchy relation is represented by a set of functions between member sets, called rollup functions. Usually, we say that a...
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4: Internet Document httpwww (context) - Data, DWA et al. - 2000
4: Maintaining data cubes under dimension updates - Hurtado, Mendelzon et al. - 1999
3: A foundation for multi-dimensional databases - Gyssens, Lakshmanan - 1997
BibTeX entry: (Update)
C. Hurtado, A. Mendelzon, and A. Vaisman. Updating OLAP dimensions (extended version). URL: ftp://ftp.db.toronto.edu/pub/ papers /fulldolap99.ps.gz. http://citeseer.ist.psu.edu/article/hurtado99updating.html More
@inproceedings{ hurtado99updating,
author = "Carlos A. Hurtado and Alberto O. Mendelzon and Alejandro A. Vaisman",
title = "Updating {OLAP} Dimensions",
booktitle = "International Workshop on Data Warehousing and {OLAP}",
pages = "60-66",
year = "1999",
url = "citeseer.ist.psu.edu/article/hurtado99updating.html" }
Citations (may not include all citations):147 The Data Warehouse Toolkit (context) - Kimball - 1996 ACM
87 Modeling multidimensional databases - Agrawal, Gupta et al. - 1997 ACM DBLP
62 The transitive reduction of a directed graph (context) - Aho, Garey et al. - 1972 DBLP
50 A foundation for multi-dimensional databases - Gyssens, Lakshmanan - 1996 ACM DBLP
44 A logical approach to multidimensional databases - Cabibbo, Torlone - 1998 ACM DBLP
35 Olap and statistical databases: Similarities and differences - Shoshani - 1997 DBLP
28 Special Issue on Materialized Views and Data Warehousing (context) - Lomet, Widom et al. - 1995
18 Maintaining data cubes under dimension updates - Hurtado, Mendelzon et al. - 1999 ACM DBLP
15 Conceptual design of data warehouses from e/r schemes - Golfarelli, Maio et al. - 1998
15 Normal forms for multidimensional databases (context) - Lehner, Albretch et al. - 1998 ACM DBLP
7 Informix OnLine Extended Parallel Server and Informix Univer.. (context) - Corporation - 1996
6 An introduction to OLAP (context) - Software - 1996
1 molap debate: Usage based aggregation and flexible holap (context) - Salka, rolap - 1998
1 Modeling large olap scenarios (context) - Lehner - 1998
Documents on the same site (http://www.db.toronto.edu/~avaisman/papers.html):
Maintaining Data Cubes under Dimension Updates - Carlos Hurtado (1999) (Correct)
Supporting Dimension Updates in an OLAP - Server Alejandro Vaisman (Correct)
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