Title :
Partial-sum queries in OLAP data cubes using covering codes
Author :
Ho, Ching-Tien ; Bruck, Jehoshua ; Agrawal, Rakesh
Author_Institution :
IBM Almaden Res. Center, San Jose, CA, USA
fDate :
12/1/1998 12:00:00 AM
Abstract :
A partial-sum query obtains the summation over a set of specified cells of a data cube. We establish a connection between the covering problem in the theory of error-correcting codes and the partial-sum problem and use this connection to devise algorithms for the partial-sum problem with efficient space-time trade-offs. For example, using our algorithms, with 44 percent additional storage, the query response time can be improved by about 12 percent; by roughly doubling the storage requirement, the query response time can be improved by about 34 percent
Keywords :
data mining; database theory; error correction codes; query processing; OLAP data cubes; data cube; error-correcting codes; multidimensional database; on-line analytical processing; partial-sum problem; partial-sum query; precomputation; query algorithm; query response time; Aggregates; Application software; Control systems; Data analysis; Data models; Data warehouses; Databases; Insurance; Multidimensional systems; Time measurement;
Journal_Title :
Computers, IEEE Transactions on