FlexPref: A Framework for Extensible Preference Evaluation in Database Systems

Personalized database systems give users answers tailored to their personal preferences. While numerous preference evaluation methods for databases have been proposed (e.g., skyline, top-k, k-dominance, k-frequency), the implementation of these methods at the core of a database system is a doubleedged sword. Core implementation provides efficient query processing for arbitrary database queries, however this approach is not practical as each existing (and future) preference method requires a custom query processor implementation. To solve this problem, this paper introduces FlexPref, a framework for extensible preference evaluation in database systems. FlexPref, implemented in the query processor, aims to support a widearray of preference evaluation methods in a single extensible code base. Integration with FlexPref is simple, involving the registration of only three functions that capture the essence of the preference method. Once integrated, the preference method "lives" at ...

• Type: Conference
• Year: 2010
• Where: ICDE
• Authors: Justin J. Levandoski, Mohamed F. Mokbel, Mohamed E. Khalefa
• Keywords: Database, Extensible Preference Evaluation, ICDE 2010, Multi-table Preference Queries, Preference Evaluation Methods