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SIGMOD
2009
ACM

Dictionary-based order-preserving string compression for main memory column stores

9 years 9 months ago
Dictionary-based order-preserving string compression for main memory column stores
Column-oriented database systems [19, 23] perform better than traditional row-oriented database systems on analytical workloads such as those found in decision support and business intelligence applications. Moreover, recent work [1, 24] has shown that lightweight compression schemes significantly improve the query processing performance of these systems. One such a lightweight compression scheme is to use a dictionary in order to replace long (variable-length) values of a certain domain with shorter (fixedlength) integer codes. In order to further improve expensive query operations such as sorting and searching, column-stores often use order-preserving compression schemes. In contrast to the existing work, in this paper we argue that orderpreserving dictionary compression does not only pay off for attributes with a small fixed domain size but also for long string attributes with a large domain size which might change over time. Consequently, we introduce new data structures that effi...
Carsten Binnig, Stefan Hildenbrand, Franz Fär
Added 05 Dec 2009
Updated 05 Dec 2009
Type Conference
Year 2009
Where SIGMOD
Authors Carsten Binnig, Stefan Hildenbrand, Franz Färber
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