17-09-2009, 10:13 PM
ONLINE INDEX RECOMMENDATIONS FOR HIGH-DIMENSIONAL DATABASES USING QUERY WORKLOADS
Abstract: Usually users are interested in querying data over a relatively small subset of the entire attribute set at a time. A potential solution is to use lower dimensional indexes that accurately represent the user access patterns. If the query pattern change, then the query response using the physical database design that is developed based on a static snapshot of the query workload may significantly degrade To address these issues, we introduce a parameterizable technique to recommend indexes based on index types that are frequently used for high-dimensional data sets and to dynamically adjust indexes as the underlying query workload changes. We incorporate a query pattern change detection mechanism to determine when the access patterns have changed enough to warrant change in the physical database design.
