Automatically assigned DDC number: 00574
Manually assigned DDC number: 005745
Number of references: 16
Title: pCube: Update-Efficient Online Aggregation with Progressive Feedback and Error Bounds
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Subject: Mirek Riedewald,Divyakant Agrawal,Amr El Abbadi pCube: Update-Efficient Online Aggregation with Progressive Feedback and Error Bounds
Description: Data Cubes are used in large data warehouses as a tool for online aggregation of information. Typically, online aggregation is supported by specifying a range query over a multidimensional data cube. As the number of dimensions increases, supporting efficient range queries as well as updates to the data cube becomes difficult. Another problem that arises with increased dimensionality is the sparseness of the data space. In this paper we develop a new data structure referred to as the pCube (data cube for progressive querying), to support efficient querying and updating of multidimensional data cubes in large data warehouses. pCube provides intermediate results with absolute error bounds (to allow trading accuracy for fast response time), efficient updates, scalability with increasing dimensionality, and preaggregation to support large range queries. We present both a general solution and an implementation of pCube and report the results of experimental evaluations. Key Words: OLAP, Da...
Contributor: The Pennsylvania State University CiteSeer Archives
Publisher: unknown
Date: 2000-02-05
Pubyear: 2000
Format: ps
Identifier: http://citeseer.ist.psu.edu/317445.html
Source: http://www.cs.ucsb.edu/TRs/Docs/TRCS00-02.ps
Language: en
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Rights: unrestricted
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