XML View Materialization: Models and Implementation

摘要

The view mechanism can provide the user with an appropriate portion of database through data filtering and integration. Views are often materialized for query performance improvement, and in that case, their consistency needs to be maintained against the updates of the underlying data. They can be either recomputed or incrementally refreshed by reflecting only the relevant updates. With the emergence of XML as the standard for data exchange on the Internet, active research is under way for efficient storing and querying XML documents with the DBMS. In this paper, we propose three models of XML view materialization with incremental refresh (Model-R, Model-Rx, and Model-Fx) when the RDBMS is employed for storing XML documents as well as their materialized views. Implementation of XML view materialization with Model-Rx is described, and the experimental results showing the effectiveness of XML view materialization are presented.